研究者紹介システム

佐藤 春実
サトウ ハルミ
大学院人間発達環境学研究科 人間環境学専攻
教授
学長補佐
応用化学関係
Last Updated :2022/01/10

研究者情報

所属

  • 【主配置】

    大学院人間発達環境学研究科 人間環境学専攻
  • 【配置】

    国際人間科学部 環境共生学科, 発達科学部 人間環境学科, 分子フォトサイエンス研究センター

学位

  • 博士(工学), 群馬大学

授業科目

ジャンル

  • 科学・技術 / 化学

コメントテーマ

  • 高分子化学
  • 生分解性高分子
  • 循環型社会
  • 次世代プラスチック

研究活動

研究キーワード

  • X線回折
  • 赤外分光
  • 生分解性ポリマーメソ構造
  • 生分解性ポリマー
  • ラマン分光
  • メソ構造
  • 時間分解小角X線散乱法
  • 時間分解小角X線散乱
  • 高分子構造・物性
  • ラメラ構造
  • ポリヒドロキシブタン酸
  • 熱的挙動
  • 生体高分子
  • 結晶構造
  • 水素結合
  • 生分解性高分子

研究分野

  • ナノテク・材料 / 高分子材料
  • ナノテク・材料 / 高分子化学
  • ナノテク・材料 / 基礎物理化学

受賞

  • 2009年06月 資生堂, 第2回 資生堂 女性研究者サイエンスグラント, 女性研究者

    佐藤 春実

  • 2007年11月 ひょうご女性未来会議, ひょうご女性未来会議 縹(はなだ)賞, 女性

    佐藤 春実

  • 2005年10月 株式会社堀場, 第2回 堀場雅夫賞, 振動分光

    佐藤 春実

  • 2004年02月 高分子学会, 高分子学会研究奨励賞, 高分子研究

    佐藤 春実

  • 2002年12月 P&G, P&G Recognition Award (業績賞), Out standing scientific contribution toward the fundamental understanding of bio-based biodegradable polymers.

    佐藤 春実

論文

  • Mao Nochi, Yukihiro Ozaki, Harumi Sato

    Elsevier BV, 2021年11月, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 260, 119900 - 119900

    [査読有り]

    研究論文(学術雑誌)

  • Huiqiang Lu, Harumi Sato, Sergei G. Kazarian

    Inter- and intramolecular interactions in multicomponent polymer systems influence their physical and chemical properties significantly and thus have implications on their synthesis and processing. In the present study, chemical images were obtained by plotting the peak position of a spectral band from the data sets generated using in situ attenuated total reflection Fourier transform infrared (ATR FT-IR) spectroscopic imaging. This approach was successfully used to visualize changes in intra- and intermolecular interactions in poly(3-hydroxybutyrate)/poly(L-lactic acid) (PHB/PLLA) blends during the isothermal melt crystallization. The peak position of ν(C=O) band, which reflects the nature of the intermolecular interaction, shows that the intermolecular interactions between PHB and PLLA in the miscible state (1733 cm−1) changes to the inter- and intramolecular interaction (CH3⋯O=C, 1720 cm−1) within PHB crystal during the isothermal melt crystallization. Compared with spectroscopic images obtained by plotting the distribution of absorbance of spectral bands, which reveals the spatial distribution of blend components, the approach of plotting the peak position of a spectral band reflects the spatial distribution of different intra- and intermolecular interactions. With the process of isothermal melt-crystallization, the disappearance of the intermolecular interaction between PHB and PLLA and the appearance of the inter- and intramolecular interactions within the PHB crystal were both visualized through the images based on the observation of the band position. This work shows the potential of using in-situ ATR FT-IR spectroscopic imaging to visualize different types of inter- or intramolecular interactions between polymer molecules or between polymer and other additives in various types of multicomponent polymer systems.

    SAGE Publications, 2021年04月22日, Applied Spectroscopy, 000370282110102 - 000370282110102

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    研究論文(学術雑誌)

  • Tatsuro Nasu, Yukihiro Ozaki, Harumi Sato

    Elsevier BV, 2021年04月, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 250, 119305 - 119305

    [査読有り]

    研究論文(学術雑誌)

  • Yumiko Yamamoto, Hiromichi Hoshina, Harumi Sato

    © Herein, differences in the intermolecular interactions and flexibility between poly(ethylene terephthalate) (PET) and poly(butylene terephthalate) (PBT) are studied by far-infrared, terahertz (THz), and low-frequency Raman spectroscopy and quantum chemical calculations (QCCs). Interatomic distance calculations based on the reported crystal structures and natural bond orbital analysis indicate that PBT exhibits intermolecular hydrogen bonding between a C=O group and a CH2 group in the adjacent molecular chains, while PET does not have such hydrogen bonding. The results of infrared measurements also suggest that the C=O and CH2 groups of PBT are involved in intermolecular hydrogen bonding. Both PET and PBT show a THz band at around 113 cm-1 and a Raman band at around 111 cm-1. These bands indicate different thermal behaviors of PET and PBT. The results of QCCs performed using the Cartesian coordinate tensor transfer method suggest that these bands of PBT include the CH2 bending mode, while those of PET have only a small contribution from the corresponding mode. These differences in the thermal behavior and vibrational modes of the 113 cm-1 bands can be possibly attributed to the difference in flexibility between PET and PBT due to the different number of CH2 groups. In addition, these bands of PBT seem to reflect the intermolecular C=O···H-C hydrogen bonding. Therefore, it may be concluded that the difference in the number of CH2 groups causes the difference in the flexibility of the molecular chains between PBT and PET and the existence or non-existence of intermolecular C=O···H-C hydrogen bonding. It is worth noting that THz and low-frequency Raman spectroscopy can clearly reveal the difference in flexibility. It is also very likely that both the flexibility of the molecular chains and the intermolecular hydrogen bonding affect the difference in the crystallization rate between PET and PBT.

    2021年01月07日, Macromolecules, 54 (542), 1052 - 1062

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    研究論文(学術雑誌)

  • Huiqiang Lu, Sergei G. Kazarian, Harumi Sato

    © 2020 American Chemical Society. The detection of phase separation and crystallization in biopolymer blends is an important aspect of biopolymer processing. In this study, attenuated total reflection (ATR)-Fourier transform infrared (FTIR) spectroscopic imaging has been applied to visualize the crystallization and phase separation of a poly(3-hydroxybutyrate) (PHB)/poly(L-lactic acid) (PLLA) blend simultaneously in situ. The peak shift of the ν(C=O) band of PHB during the isothermal crystallization process revealed a transformation of the intermolecular interaction between PHB and PLLA in the miscible state to the inter- and intramolecular interactions between PHBs in the immiscible state. The appearance and gradual separation of crystalline PHB-rich domains and crystalline PLLA-rich domains in the acquired ATR-FTIR spectroscopic images clearly showed the whole dynamic process of phase separation. With increasing isothermal crystallization time, the larger size of crystalline polymer-rich domains and the increasing integrated absorbance of the ν(C=O) band of crystalline polymers both revealed the increasing degree of crystallization in the polymer blend, which is constant with the isothermal crystallization process of pure polymers. The extent of phase separation between crystalline PHB-rich domains and crystalline PLLA-rich domains is enhanced with increasing isothermal crystallization temperature. This is because the higher isothermal crystallization temperature slows down the crystallization, which leaves more time for phase separation. The degree of crystallization in the blend decreased with increasing isothermal crystallization temperature, which was also constant with the isothermal crystallization process of the pure polymers. Finally, a new proposal for the mechanism of phase separation and crystallization in the polymer blend has been discussed. It was found that decreasing the isothermal crystallization temperature is an effective method to restrict the phase separation and control the final morphology in the upper critical solution temperature (UCST) crystallizable polymer blend.

    2020年10月27日, Macromolecules, 53 (20), 9074 - 9085

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    研究論文(学術雑誌)

  • Dian Marlina, Harumi Sato

    © Published under licence by IOP Publishing Ltd. Biodegradable polymer is preferred material to replace the conventional petroleum based polymer materials to protect the nature and conserve oil supplies. Information related to higher-order structure and hydrogen bonding among polymers can be observed in the low-frequency region (3.3-333 cm-1) using terahertz (THz) spectroscopy. THz spectra measurement of temperature-dependent investigation of poly(3-hydroxybutyrate) (PHB) homopolymer and polymer blend of PHB/glycol chitosan with the blend ratios of (80/20) and (60/40) have been performed to investigate the change in higher-order structure and intermolecular hydrogen bonding formed by polymer blends of PHB and glycol chitosan. The THz spectra revealed that the peak at 82 cm-1 does not collapse even in the high temperature indicating the important role of hydrogen bonding interaction between poly(3-hydroxybutyrate) (PHB) and glycol chitosan in maintaining the higher-order structure of the PHB in its blending system.

    2020年05月22日, IOP Conference Series: Materials Science and Engineering, 835 (1)

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    研究論文(国際会議プロシーディングス)

  • Pavel Pleskunov, Daniil Nikitin, Renata Tafiichuk, Artem Shelemin, Jan Hanuš, Jaroslav Kousal, Zdeněk Krtouš, Ivan Khalakhan, Peter Kúš, Tatsuro Nasu, Tomoki Nagahama, Chihiro Funaki, Harumi Sato, Marcel Gawek, Andreas Schoenhals, Andrei Choukourov

    Copyright © 2020 American Chemical Society. Polymer nanoparticles (NPs) can be highly attractive in numerous applications, including biomedicine, where the use of inorganic matter may be detrimental for living tissues. In conventional wet chemistry, polymerization and functionalization of NPs with specific chemical groups involves complex and often numerous reactions. Here, we report on a solvent-free, single-step, low-temperature plasma-based synthesis of carboxylated NPs produced by the polymerization of acrylic acid under the conditions of a glow discharge. In a monomer-deficient regime, the strong fragmentation of monomer molecules by electron impact results in the formation of 15 nm-sized NPs with <1% retention of the carboxyl groups. In an energy-deficient regime, larger 90 nm-sized NPs are formed with better retention of carboxyl groups that reaches 16%. All types of NPs exhibit a glass transition above room temperature, which makes them highly stable in an aqueous environment with no dissolution or swelling. The NPs are also found to degrade thermally when heated above 150 °C, with a decrease in the mean NP size but with retention of the chemical composition. Thus, plasma polymerization proves to be a versatile approach for the production of polymer NPs with a tunable size distribution, chemical composition, and physical properties.

    2020年01月30日, Journal of Physical Chemistry B, 124 (4), 668 - 678

    [査読有り]

    研究論文(学術雑誌)

  • Dian Marlina, Yeonju Park, Hiromichi Hoshina, Yukihiro Ozaki, Young Mee Jung, Harumi Sato

    © 2020 The Japan Society for Analytical Chemistry. An intensive analysis of far-infrared (far-IR), low-frequency Raman, and wide angle X-ray diffraction (WAXD) data has been performed by two-dimensional correlation spectroscopy (2D-C0S) as a function of the blend ratio of poly(3-hydro\ybutyrate)/poly(4-vinylphenol) (PHB/PVPh). Honiospectral 2D-C0S revealed that a weak band at 128 cm-1 in the far-IR spectra appeared more clearly in the 2D correlation spectra. Heterospectral 2D-C0S (far-IR/Iow-frequency Raman and far-IRAVAXD) provided very important results that were hardly detected in the conventional 2D-COS. A far-IR peak at 130 cm-1 in the heterospectral 2D-COS had negative correlations with the peaks in the low-frequency Raman spectra at 81, 100, and 110 cm-1 and \\v\XD profile 8.78 and 11.01°. These results indicated that those peaks have different origins; the 130 cm-1 peak comes from the intermolecular C=0-H-0 hydrogen bond between PHB and PVPh, while those for low-frequency Raman and WAXD peaks are the features of PHB crystalline structure.

    2020年, Analytical Sciences, 36 (6), 731 - 737

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    研究論文(学術雑誌)

  • Nami Ueno, Tomonari Wakabayashi, Harumi Sato, Yusuke Morisawa

    Copyright © 2019 American Chemical Society. This study investigates the electronic transitions of complexes of lithium with polyethylene glycol (PEG) by the absorption bands of solvent molecules via attenuated total reflectance spectroscopy in the far-UV region (ATR-FUV). Alkali-metal complexes are interesting materials because of their functional characteristics such as good ionic conductivity. These complexes are used as polymer electrolytes for Li batteries and as one of the new types of room-temperature ionic liquids, termed solvation ionic liquids. Considering these applications, alkali-metal complexes have been studied mainly for their electrochemical characteristics; there is no fundamental study providing a clear understanding of electronic states in terms of electronic structures for the ground and excitation states near the highest occupied molecular orbital-lowest occupied molecular orbital transitions. This study explores the electronic transitions of ligand molecules in alkali-metal complexes. In the ATR-FUV spectra of the Li-PEG complex, a decrease in intensity and a large blue shift (over 4 nm) were observed to result from an increase in the concentration of Li salts. This observation suggests the formation of a complex, with coordinate bonding between Li+ and the O atoms in PEG. Comparison of the experimental spectrum with a simulated spectrum of the Li-PEG complex calculated by time-dependent density functional theory indicated that changes in the intensities and peak positions of bands at approximately 155 and 177 nm (pure PEG shows bands at 155, 163, and 177 nm) are due to the formation of coordinate bonding between Li+ and the O atoms in the ether molecule. The intensity of the 177 nm band depends on the number of residual free O atoms in the ether, and the peak wavelength at approximately 177 nm changes with the expansion of the electron clouds of PEG. We assign a band in the 145-155 nm region to the alkali-metal complex because we observed a new band at approximately 150 nm in the ATR-FUV spectra of very highly concentrated binary mixtures.

    AMER CHEMICAL SOC, 2019年12月19日, Journal of Physical Chemistry A, 123 (50), 10746 - 10756, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Dian Marlina, Hiromichi Hoshina, Yukihiro Ozaki, Harumi Sato

    © 2019 Elsevier Ltd Composition- and temperature-dependent far-infrared (FIR), terahertz (THz), and low-frequency Raman spectra of poly(3-hydroxybutyrate) (PHB)/Poly(4-vinylphenol) (PVPh) polymer blends were measured to investigate the effects of PVPh in PHB crystallization. FIR, low-frequency Raman, and wide angle X-ray diffraction (WAXD) studies revealed that PVPh reduces the crystallinity of PHB in blends without a significant change in the crystal structure. The FIR and low-frequency Raman spectra divided the blends into three categories: high-ordered crystalline, less-ordered crystalline, and amorphous. A new peak was observed at 135 cm−1 in the FIR spectra of the PHB/PVPh blends, which may be assigned to the less-ordered crystalline phase of PHB, predicting the inter-molecular hydrogen-bond interactions of PHB/PVPh. The intensity ratio of the peaks at 97 and 82 cm−1 changed with the blending ratio variations owing to the crystalline dynamics of PHB. Deformation of the PHB helical structure occurred first, followed by weakening of the intra-molecular hydrogen-bond within PHB. Shifts of several peaks were observed in the FIR and low-frequency Raman spectra, suggesting that the intra-molecular hydrogen-bond (C[dbnd]O⋯H-C-) within PHB weakened with temperature. The novelty of the present study is to demonstrate that low-frequency vibrational spectroscopy is very sensitive to monitor changes from the intra-molecular hydrogen bonding to inter-molecular hydrogen bonding between PHB and PVPh.

    ELSEVIER SCI LTD, 2019年10月24日, Polymer, 181, 英語

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    研究論文(学術雑誌)

  • Taizo Aoyama, Harumi Sato, Yukihiro Ozaki

    © 2019 Wiley Periodicals, Inc. Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH) is a biodegradable and highly flexible polymer, which should have various applications like inflation film, T die extruded films and sheets, injection-molded and blow-molded articles, etc. Despite its attractive features, it suffers from the limitation of slow crystallization during molding, and none of the numerous nucleating agents examined to resolve this issue has yet proven successful. The addition of a higher-melting biodegradable polyester is reported to be an effective solution, with the residual crystals preserved during PHBH melting being important for subsequent crystallization. However, this phenomenon is only observed under static conditions, for example, during differential scanning calorimetry and spectroscopic analysis using a variable temperature cell. In this study, the relationship between the amount of residual crystals and the subsequent crystal behavior was investigated under dynamic conditions, such as practical extrusion molding. Online near-infrared spectroscopy was used to analyze the residual amount of crystals at the extruder outlet and explore the crystallization behavior of the extruded strands in real time. Even under the dynamic conditions, a close relationship was found between the amount of residual crystals and the subsequent crystallization behavior. In addition, the Avrami exponent (n) and the crystallization rate constant (k) were analyzed.

    2019年08月, Polymer Crystallization, 2 (4)

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    研究論文(学術雑誌)

  • Shigeki Yamamoto, Erika Ohnishi, Harumi Sato, Hiromichi Hoshina, Daitaro Ishikawa, Yukihiro Ozaki

    © 2019 American Chemical Society. Far-infrared (FIR) and low-frequency Raman bands in the 90-400 cm1 region of crystalline nylon 6 in-form were assigned based on comparisons of experimental spectra and quantum mechanical calculations. A fragment methodology was applied in the calculations for explicit consideration of interchain interactions and crystal symmetry. The main features in both Raman and FIR spectra were reproduced well, which enabled the band assignments based on density functional theory and the significant improvement of the conventional assignments for which there had been a big dispute. Temperature dependence of the experimental FIR spectra has revealed that both bands at 222 and 111 cm1 are characteristic of the α-form structure. Their intensities linearly decreased with increasing temperature with marked two transition points, which correspond to glass and Brill transitions. Both bands can be indicators of the lattice length of α-form nylon 6. On the basis of the calculations, the FIR and Raman bands at ∼100 cm1 were successfully assigned to methylene torsion and transverse motion of amide groups in which NH and O atoms move out of the amide plane. Decomposition of the calculated spectra revealed that the intensities at ∼100 cm1 in both spectra mainly originate from the amide groups and only secondarily from the methylene groups. Moreover, the FIR intensities at ∼100 cm1 were nearly perfectly governed by the amide groups, which could be a reason why this FIR band is particularly sensitive to hydrogen bonds among the low-frequency bands. The FIR band at 222 cm1 was assigned to methylene torsion and transverse motion of NH groups. Both FIR bands at 222 and 111 cm1 contain perpendicular motions of methylene and amide groups. This will be a reason for their sensitivity to interchain interactions in α-form nylon 6. Contrarily, the FIR band at 294 cm1 is in parallel polarization to the chain direction and assigned to a deformation of C-CH2-CH2 and bending motion of C-O in the amide plane. This is the reason why this band is not sensitive to the structural transitions of nylon 6. Our previous works revealed that in regions of 125 and 70 cm1, there are specific vibrational peaks of crystalline polyesters primarily arising from out-of-plane motion of ester groups. We can find a similarity in 125 and 70 cm1 regions between crystalline polyesters and nylon 6 that both polymers show specific out-of-plane vibrational peaks around 100 cm1, which are sensitive to the lattice length among polymer chains.

    AMER CHEMICAL SOC, 2019年06月27日, Journal of Physical Chemistry B, 123 (25), 5368 - 5376, 英語

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    研究論文(学術雑誌)

  • Jian Hu, Jiping Wang, Mengfan Wang, Yukihiro Ozaki, Harumi Sato, Jianming Zhang

    © 2019 Elsevier Ltd In the present study, isothermal crystallization of asymmetric PLLA/PDLA blend (4/1) at around 100 °C was investigated by in-situ time-resolved FTIR and Raman Imaging measurement. FTIR result indicated that crystallization of homo-crystal (HC) was retarded due to the formation of large amount of stereocomplex (SC) in the isothermal process. A unique spherulite morphology was observed through polarized optical microscopy (POM) and the distribution of SC and HC in and out of the big spherulite was revealed under the assistance of Raman imaging measurement. These results demonstrated that the SC crystal dispersed homogeneously both in the amorphous and spherulite region. However, the HC mainly located in the big spherulite area. A possible isothermal crystallization process for the asymmetric PLLA/PDLA blend was proposed.

    2019年05月20日, Polymer, 172 (20), 1 - 6, 英語

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    研究論文(学術雑誌)

  • Fumita Nishimura, Hiromichi Hoshina, Yukihiro Ozaki, Harumi Sato

    © 2018, The Society of Polymer Science, Japan. Isothermal crystallization of poly(glycolic acid) (PGA) has been studied using terahertz (THz) and infrared (IR) spectroscopy and simultaneous small-angle X-ray scattering (SAXS)/wide-angle X-ray diffraction (WAXD) measurements. Changes in the intermolecular interactions in PGA during the isothermal crystallization were monitored using THz spectroscopy, which is an efficient technique for analyzing the higher-order structure of polymers. In the THz spectra, the temporal difference in the intensity observed in the isothermal crystallization is due to the difference in the vibrational origins of two bands at 192 and 65 cm−1. The band at 192 cm−1 primarily originates from the intramolecular vibrational mode (twisting of the local structure of the PGA molecular chain). Furthermore, the band at 65 cm−1 exists due to the intermolecular vibration mode (C = O···H-C hydrogen bonds between polymer chains). In addition, these THz bands appeared after the appearance of the SAXS and WAXD peaks. When a lamellar structure is formed and the molecular chains are oriented, the THz band originating from the intermolecular vibration is observed. It is highly possible that the intermolecular vibration appearing in the THz spectra requires the molecular chains to be oriented.

    NATURE PUBLISHING GROUP, 2019年02月01日, Polymer Journal, 51 (2), 237 - 245, 英語

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    研究論文(学術雑誌)

  • Mateusz. Z. Brela, Marek J. Wόjcik, Marek Boczar, Erika Onishi, Harumi Sato, Takahito Nakajima, Yukihiro Ozaki

    © 2018 Wiley Periodicals, Inc. Proton dynamics of hydrogen bonds (HBs) in the α and γ form of Nylon 6 were investigated by Born–Oppenheimer molecular dynamics (BOMD). Our results show differences in the dynamic effects of interchain HB interactions between the α form and the γ form of Nylon 6. Analysis of the time course of the geometrical parameters of HBs along the BOMD simulations has shown that HBs are dynamically favored in the γ form of Nylon. The quantization of the NH stretching mode enables a detailed discussion of the strengths of HB interactions. Solving the Schrödinger equation for the snapshots of one-dimensional proton potentials, extracted from the ab initio MD, enables the consideration of anharmonicity, thermodynamics, and approximate quantum effects on proton movement. A larger red shift of the NH stretching band was observed in the γ form compared with the α form. Our study shows that HBs are more stabilized in the γ form than in the α form, which is mainly due to the higher number of HBs. The distribution of HBs along the trajectory clearly reveals the preference of the γ form. The quantization of the NH motion enables the discussion of the differences in the IR spectra between the two forms.

    2018年07月15日, Int. J. Quantum Chem, 118 (14), e25595, 英語

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    研究論文(学術雑誌)

  • Seika Tatsuoka, Harumi Sato

    © 2018 Elsevier B.V. We measured terahertz (THz) and low-frequency Raman spectra of Poly (butylene succinate) (PBS) which shows the crystal transition from α to β by stretching. For the assignment of the absorption peaks in the low-frequency region, we performed quantum chemical calculations with Cartesian-coordinate tensor transfer (CCT) method. Four major peaks appeared in the THz spectra of PBS at around 58, 76, 90, and 100 cm−1, and in the low-frequency Raman spectra a peak was observed at 88 cm−1. The THz peak at 100 cm−1 and the Raman peak at 88 cm−1 show a shift to a lower wavenumber region with increasing temperature. The quantum chemical calculation of β crystal form reveals the new peak appears above 100 cm−1. It was found that two kinds of peaks overlapped at around 100 cm−1 in the THz spectra of PBS. One of them can be assigned to a weak hydrogen bond between the C=O and CH2 groups in the intermolecular chains, which is perpendicular to the molecular chain of the α crystal form. Another one showed a parallel polarization which can be assigned to the intramolecular interaction between O (ether) and H-C groups in the β crystal form. The position of the peak at around 100 cm−1 in the perpendicular polarization changed to a lower wavenumber region with stretching, because of the weakening of the intermolecular hydrogen bonding by increasing the interatomic distances. On the other hand, that of the parallel polarization shifts to a higher wavenumber region because of the shortening of the interatomic distance from α to β crystal form (the strength of the intramolecular hydrogen bonding became stronger) by stretching.

    Elsevier B.V., 2018年05月15日, Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 197 (197), 95 - 102, 英語

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    研究論文(学術雑誌)

  • Chihiro Funaki, Shigeki Yamamoto, Hiromichi Hoshina, Yukihiro Ozaki, Harumi Sato

    © 2018 Elsevier Ltd The long range structure of poly(ε-caprolactone) (PCL) has been studied by terahertz (THz) spectroscopy, infrared (IR) spectroscopy and quantum chemical calculations (QCCs). Natural bond orbital (NBO) analysis and the calculation of the interatomic distances between C-H and O=C groups in PCL crystalline indicate that the PCL chain has three kinds of weak intermolecular interactions between the CH2 and C=O groups. In the IR spectra, significant changes due to the influence of hydrogen bondings were observed in the CH2 and C=O stretching vibration regions. The results of QCCs performed by using the Cartesian Coordinate Tensor Transfer (CCT) method to assign the THz spectra of PCL suggest that the peaks at 47 and 67 cm−1 reflect the atomic motions of the C=O + CH2 moiety derived from the weak C-H⋯O=C hydrogen bondings. THz spectroscopy allows us to observe the intermolecular hydrogen bondings of the polymer separately, since hydrogen bondings with different strengths yield different peaks in a THz spectrum. The results of THz and IR spectral analysis, and QCCs all indicate that PCL forms three kinds of weak intermolecular C-H⋯O=C hydrogen bondings between the CH2 and C=O groups. This may be one of the causes for the low melting temperature but high crystallinity of PCL. There are about six interactions in PCL and about sixteen interactions in polyglycolic acid (PGA), within the lamellar thickness. Therefore, it is suggested that the difference in the number of intermolecular interactions within the lamellar thickness leads to the difference in melting points between the two polymers.

    ELSEVIER SCI LTD, 2018年02月14日, Polymer, 137, 245 - 254, 英語

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    研究論文(学術雑誌)

  • Morihisa Terasaki, Khasanah, Yukihiro Ozaki, Isao Takahashi, Harumi Sato

    © 2017 Elsevier Ltd The phase separation of poly(methyl methacrylate) (PMMA)/poly(4-vinyl phenol) (PVPh) (50/50 wt%) ultra-thin films was investigated by infrared reflection absorption spectroscopy (IR-RAS). Of particular note is that we succeeded in measuring the IR-RAS spectra of ultra-thin films of PMMA/PVPh (50/50 wt%) polymer blend with a film thickness of only 2.14 nm. It was found from the present study that the PMMA/PVPh polymer blends were clearly separated as the film thickness was thinner than the radius of gyration of PMMA. The IR-RAS spectra reveal that the hydrogen bond between the C=O group of PMMA and the OH group of PVPh is broken upon the phase separation in the ultra-thin film. In the spectra, many peaks are observed in the OH stretching region of the ultra-thin PMMA/PVPh films, indicating the existence of several weak hydrogen bonds with slightly different interactions, presumably due to the quasi-stable molecular chain configurations resulting from the strong confinement. This is in sharp contrast to the corresponding bulk sample for which a broad band is usually observed in this region because of the continuous distribution of the hydrogen bonding, which is typical for the blends.

    ELSEVIER SCI LTD, 2018年01月17日, Polymer, 135, 69 - 75, 英語

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    研究論文(学術雑誌)

  • Dian Marlina, Harumi Sato, Hiromichi Hoshina, Yukihiro Ozaki

    © 2017 Elsevier Ltd Composition-, temperature-, and polarization-dependent low-frequency Raman and terahertz (far-infrared; FIR) spectra were measured for poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (P(HB-co-HV)) with PHB-type crystal structure and PHV-type crystal structure to investigate their intermolecular interactions. Band assignments were attempted by comparing the low-frequency Raman and terahertz (FIR) spectra of P(HB-co-HV) with the varying HV content with the corresponding spectra of PHB and by observing spectral variations. The spectra of P(HB-co-HV) (HV = 9, 15, and 21 mol%) are similar to the corresponding spectra of PHB. There are two bands at 97 and 82 cm−1 which are assigned to a spring type vibrational mode of the helical structure and to the mode reflecting the intermolecular interaction (CH3⋯O=C hydrogen bond), respectively. The low-frequency Raman and terahertz spectra of P(HB-co-HV) with HV content of 66 and 88.6 mol% show bands at 91 and 78 cm−1. The 78 cm−1 band is assigned to the intermolecular interaction (CH2⋯O=C hydrogen bond). In contrast to the 97 cm−1 band of P(HB-co-HV) with the low HV content, the 91 cm−1 band of P(HB-co-HV) with the high HV content show a temperature-dependent shift by 4 cm−1. Thus, although it seems that both 97 and 91 cm−1 bands are due to spring-like vibrational modes, the nature of two vibrational modes seems to be significantly different, reflecting the difference in the intermolecular interaction.

    Elsevier Ltd, 2018年01月17日, Polymer, 135 (135), 331 - 337, 英語

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    研究論文(学術雑誌)

  • Krzysztof B. Beć, Yusuke Morisawa, Kenta Kobashi, Justyna Grabska, Ichiro Tanabe, Erika Tanimura, Harumi Sato, Marek J. Wójcik, Yukihiro Ozaki

    © 2018 the Owner Societies. We investigated the surface (<50 nm) of poly(3-hydroxybutyrate) (PHB) and its nanocomposite with graphene by attenuated total reflection far- and deep-ultraviolet (ATR-FUV-DUV; 145-300 nm; 8.55-4.13 eV) spectroscopy and quantum mechanical calculations. The major absorption of polymers occurs in FUV and is related to Rydberg transitions. ATR-FUV-DUV spectroscopy allows for direct measurements of these transitions in the solid phase. Using ATR-FUV-DUV spectroscopy, periodic density functional theory (DFT) and time-dependent DFT (TD-DFT), we explained the origins of the FUV-DUV absorption of PHB and provided insights into structural changes of PHB which occur upon formation of a graphene nanocomposite and upon heating of the pure polymer. The structural changes cause specific and gradual spectral variations in FUV-DUV. We systematically studied the relaxation of the polymer helix and concluded that the common feature of all models of the unfolded helix lies in a specific and consistent FUV-DUV spectral signature. Relaxed structures feature a blue-shift of the major FUV transition (non-bonding molecular orbital to Rydberg 3p and π to π∗) as compared with crystalline PHB. The FUV absorption of the relaxed structures was determined to be significantly stronger than that of the crystalline state. These results are consistent with the observed temperature-dependent spectra of the pure PHB. The simulation of the thermal expansion of the crystalline polymer by a periodic-DFT study allows us to exclude the possibility that spectral variations observed experimentally are influenced by changes in the crystalline phase. We concluded that the crystallinity of PHB at the sample surface increases with an increase in graphene content in the nanocomposite. However, it is unlikely that the polymer structure inside the crystal is affected; instead the FUV-DUV spectral variations result from changes in the polymer morphology that occur at the sample surface. The phase transition of PHB is affected by temperature and addition of graphene content. These changes are likely to be the opposite of those occurring in the bulk sample.

    ROYAL SOC CHEMISTRY, 2018年, Physical Chemistry Chemical Physics, 20 (13), 8859 - 8873, 英語

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    研究論文(学術雑誌)

  • Hotsumi Iwasaki, Madoka Nakamura, Nozomu Komatsubara, Makoto Okano, Masayoshi Nakasako, Harumi Sato, Shinichi Watanabe

    © 2017 American Chemical Society. We report a correlation between the dielectric property and structure of stretched poly(lactic acid) (PLA) films, revealed by polarization-sensitive terahertz time-domain spectroscopy and two-dimensional (2D) wide-angle X-ray scattering (WAXS). The experiments evidence that the dielectric function of the PLA film becomes more anisotropic with increasing draw ratio (DR). This behavior is explained by a classical Lorentz oscillator model assuming polarization-dependent absorption. The birefringence can be systematically altered from 0 to 0.13 by controlling DR. The combination of terahertz spectroscopy and 2D WAXS measurement reveals a clear correlation between the birefringence in the terahertz frequency domain and the degree of orientation of the PLA molecular chains. These findings imply that the birefringence is a result of the orientation of the PLA chains with anisotropic macromolecular vibration modes. Because of a good controllability of the birefringence, polymer-based materials will provide an attractive materials system for phase retarders in the terahertz frequency range.

    AMER CHEMICAL SOC, 2017年07月20日, Journal of Physical Chemistry B, 121 (28), 6951 - 6957, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Chihiro Funaki, Takuya Toyouchi, Hiromichi Hoshina, Yukihiro Ozaki, Harumi Sato

    © 2017, © The Author(s) 2017. The distribution of crystallinity and the crystalline orientation of a poly(ɛ-caprolactone) (PCL) film have been studied using terahertz (THz) imaging. Terahertz images were developed by using the intensity ratio of the two spectral eaks at 1.42 and 2.03 THz that are assigned to the crystalline modes parallel and perpendicular to the c-axis (I⊥/I || ) of the PCL film. The obtained THz images show that the distribution of crystallinity and crystalline orientation vary considerably between the different regions in the PCL film, even though this inhomogeneity is not visible in the corresponding optical image. Our results clearly illustrate that THz imaging is a promising technique to characterize the physical properties of semi-crystalline polymers.

    SAGE PUBLICATIONS INC, 2017年07月01日, Applied Spectroscopy, 71 (7), 1537 - 1542, 英語

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    研究論文(学術雑誌)

  • Mateusz Z.Brela, Marek Boczar, Marek J.Woicik, Harumi Sato, Takahito Nakajima, Yukihiro Ozaki

    In this letter we present results of study of weak C-H center dot center dot center dot O=C hydrogen bonds of crystalline poly-(R)-3-hydroxybutyrate (PHB) by using Born-Oppenheimer molecular dynamics. The-polymeric structure and IR spectra of PHB result from the presence of the weak hydrogen bonds. We applied the post-molecular dynamics analysis to consider a C=O motion as indirectly involved in the hydrogen bonds. Quantization of the nuclear motion of the oxygens was,done to perform detailed analysis of the strength and properties of the C=O bands involved in the weak hydrogen bonds. We have also shown the dynamic character of the weak hydrogen bond interactions. (C) 2017 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2017年06月, Chemical Physics Letters, 678 (678), 112 - 118, 英語

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    研究論文(学術雑誌)

  • Mengfan Wang, Sanpon Vantasin, Jiping Wang, Harumi Sato, Jianming Zhang, Yukihiro Ozaki

    Poly(butylene adipate) (PBA), an important biodegradable polymer, can crystallize into a particular type of ring banded spherulite, in each of which two crystal forms, alpha and beta, coexist. However, the distribution of the polymorphic crystals and the molecular chains orientation within the ring-banded PBA spherulites are still unclear. To determine these, in our present study, Raman spectroscopy and high spatial resolution Raman imaging were used. Characteristic Raman peaks were identified for both the alpha- and beta-forms and for amorphous structures. Using these peaks, we investigated the polymorphic crystal distribution and molecular chain orientation within the spherulites through Raman imaging. The two crystal forms are found to be unevenly distributed in the center, ring-banded, and out-layer ringless region. The results of this study also suggested that the two crystal forms can nucleate and grow in the same temperature range (31-33 degrees C), but the relative content of the alpha-form in the ring banded region becomes higher with the higher crystallization temperature. The image based on the Hermans orientation function for the ring-banded spherulite shows both bow-tie and ring-banded patterns, which means that the molecular chains in the ring-banded region orient not only about the radial direction of the spherulites but also about the substrate plane. Moreover, the molecular chain orientations also show periodically change along the radial direction of the ring-banded spherulite. The present study shows that Raman imaging is a very powerful technique in polymer crystal structure research.

    AMER CHEMICAL SOC, 2017年04月, MACROMOLECULES, 50 (8), 3377 - 3387, 英語

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    研究論文(学術雑誌)

  • Shigeki Yamamoto, Mai Miyada, Harumi Sato, Hiromichi Hoshina, Yukihiro Ozaki

    Low-frequency vibrational modes of lamellar crystalline poly(glycolic acid) (PGA) were measured on Raman and far-infrared (FIR) spectra. Among the observed bands, an FIR band at similar to 70 cm(-1) and a Raman band at 125 cm(-1) showed a gradual lower-frequency shift with increasing temperature from 20 degrees C to the melting point at similar to 230 degrees C. Their polarization direction was perpendicular to the chain axis of PGA. Both spectra were quantum-mechanically simulated with the aid of a fragment method, the Cartesian-coordinate tensor transfer, which enabled an explicit consideration of molecular interactions between two adjacent polymer chains. Good agreement was achieved between the experiment and theory in both spectra. The temperature-sensitive bands at similar to 70 cm(-1) in FIR and at 125 cm(-1) in Raman comprise the out-of-plane C=O bending motion. The temperature-dependent shifts of the low-frequency bands were successfully simulated by the DFT-spectral calculation, exploring that the main origin of the shifts is the thermal expansion of the crystal lattice. This result indicates that the thermally shifted bands may be used as an indicator of the lattice expansion of PGA. Possible changes in intermolecular interactions of PGA under temperature rising were ascribed on the basis of natural bond,orbital theory. The steric repulsion between the carbonyl O atom in one chain and the H-C bond in the adjacent chain will be a dominant interaction in the lattice-expanding process, which would cause the observed thermal shifts of the bending modes. Comparisons of the spectral assignment for PGA obtained in this study and that for poly-(R)-3-hydroxybutyrate (PHB) reported by us suggest that crystalline polyesters give vibrational modes composed of out-of-plane bending motion of C=O groups between similar to 70 and similar to 125 cm(-1), the modes of which are sensitive to the thermal expansion of crystal lattice and its concomitant changes in their intermolecular interactions.

    AMER CHEMICAL SOC, 2017年02月, JOURNAL OF PHYSICAL CHEMISTRY B, 121 (5), 1128 - 1138, 英語

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    研究論文(学術雑誌)

  • Khasanah, Kummetha Raghunatha Reddy, Shigesaburo Ogawa, Harumi Sato, Isao Takahashi, Yukihiro Ozaki

    The crystallization behavior and crystalline structures of poly(3-hydroxybutyrate) (PHB) ultrathin films similar to 52 nm) under spatial confinement were investigated using infrared reflection absorption-spectroscopy (IR-RAS) and two-dimensional grazing incidence X-ray diffraction (2DGIXD). Intermediate and highly ordered crystalline states were observed during heating and melt -cooling of these films. In the ultrathin films, the intermediate state was noticeably stable at lower temperatures, whereas the highly ordered state was more stable at higher temperatures. A transformation from the intermediate state into the highly ordered state occurred as the temperature increased, as the crystals in the intermediate state acquire sufficient thermal energy to overcome the energy barrier. 2D-GIXD results show that the intermediate state was dominant in edge -on lamellae configuration where the crystallographic b-axis is normal to the film surface. Meanwhile, the highly ordered state was predominant in flat -on lamellae configuration where the b-axis is parallel to the film surface. In the surface region, crystals strongly tended to align in an edge -on lamellae configuration.

    AMER CHEMICAL SOC, 2016年06月, MACROMOLECULES, 49 (11), 4202 - 4210, 英語

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    研究論文(学術雑誌)

  • Xinlei Yan, Harumi Sato, Yukihiro Ozaki

    Recently, tip-enhanced Raman scattering (TERS) has made tremendous progress and is often used as a powerful technique for nanoscience and technology. TERS is an emerging spectroscopic tool that combines scanning probe microscopy and Raman spectroscopy. Compared with normal Raman spectroscopy, TERS has much higher spatial resolution and sensitivity, and thus is very suitable for the structure and interactions of polymer nanocomposites. This review reports Raman and TERS studies of polymer nanocomposites containing carbon nanotubes or graphenes. The principle and advantages of TERS are described briefly first in comparison with those of normal Raman spectroscopy. Then, the usefulness of Raman and TERS spectroscopy in studying structure and interactions of polymer nanocomposites is demonstrated by introducing four examples.

    Elsevier Inc., 2016年02月12日, Spectroscopy of Polymer Nanocomposites, 88 - 111, 英語

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    論文集(書籍)内論文

  • Birefringent properties of poly-lactic acid at terahertz range

    Hotsumi Iwasaki, Makoto Okano, Nozomu Komatsubara, Madoka Nakamura, Atsuto Moriwaki, Harumi Sato, Shinichi Watanabe

    We report on a drawing-ratio dependence of the refractive index difference between the two optic axes (Delta n) of poly lactic acid films in terahertz frequency range. We found that Delta n can be controlled in a range of 0-0.04 by changing the drawing ratio. The result shows that we can design a terahertz wave plate with arbitral retardation, which will be useful for establishing polymer-based terahertz optical component with low cost and easy implementation in mass production.

    IEEE, 2016年, 2016 41ST INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ), 英語

    [査読有り]

    研究論文(国際会議プロシーディングス)

  • Harumi Sato, Mai Miyada, Shigeki Yamamoto, Kummetha Raghunatha Reddy, Yukihiro Ozaki

    Polyglycolic acid (PGA), a biodegradable polyester with a simple molecular structure, shows an abnormally high melting point of 220 degrees C which is the highest among biopolyesters. In order to investigate this peculiar physical property and the structure of PGA, its temperature-dependent infrared (IR) spectra and wide angle X-ray diffraction (WAXD) were measured. Of note in the IR spectra is that among the many bands, those due to antisymmetric and symmetric CH2 stretching modes and that due to the C-O-C stretching mode show a significantly lower wavenumber shift with temperature increase. These experimental results suggest the existence of weak C-H center dot center dot center dot O (ether) hydrogen bonding along the (110) direction in PGA. WAXD results support this suggestion by an observed noticeable decrease of a unit cell length along the (110) direction. The natural bond orbital (NBO) calculations indicate there is weak intermolecular bonding between the C-H bond of the CH2 group and the oxygen atom of the -C-O-C- linkage. The quantum chemical calculations of the IR spectra were carried out for models of PGA based on the crystalline structure by using a partial optimization in the normal mode. The results can qualitatively explain the observed temperature dependence of the CH2 stretching modes of PGA, which is due to weakening of the C-H center dot center dot center dot O interactions among polymer chains with a temperature increase. All the experimental and theoretical calculation results suggest that there is weak hydrogen bonding between the CH2 group and the ether oxygen atom. This intermolecular interaction may be the cause for the abnormally high melting point of PGA.

    ROYAL SOC CHEMISTRY, 2016年, The Royal Society of Chemistry, 6 (20), 16817 - 16823, 英語

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    研究論文(学術雑誌)

  • Mengfan Wang, Khasanah, Harumi Sato, Isao Takahashi, Jianming Zhang, Yukihiro Ozaki

    Solvent evaporation crystallization (SEC) of poly(3-hydroxybutyrate) (PHB) in a PHB/chloroform solution was investigated by time-resolved attenuated total reflection Fourier-transform infrared (ATR-FTIR) spectroscopy and grazing incidence wide angle X-ray diffraction (GI-WAXD). The ATR-FTIR investigation reveals that the PHB/chloroform solution was in a homogeneous state at first, and with the evaporation of chloroform, the separated PHB from the chloroform solvent was in the mixture of intermediate and amorphous states, but no crystal structure formed due to the presence of chloroform. Subsequently, further evaporation induced a transition from intermediate to crystal structure and the formation of C=O center dot center dot center dot H-C intramolecular interactions within the latter. As the crystal structure developed, the intramolecular interaction changed from weak to strong due to the reduced intra-molecular distance within the lamella structure. The results of the GI-WAXD investigation suggest the presence of two kinds of intermediate structures with different order (less ordered and highly ordered). During SEC, the intermediate structures formed first, subsequently transforming into a crystal structure.

    ROYAL SOC CHEMISTRY, 2016年, RSC ADVANCES, 6 (97), 95021 - 95031, 英語

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    研究論文(学術雑誌)

  • Khasanah, Kummetha Raghunatha Reddy, Harumi Sato, Isao Takahashi, Yukihiro Ozaki

    Crystallization behavior and intermolecular hydrogen-bonding interactions of poly(3-hydroxybutyrate) (PHB)/chitin blends on as-solution cast films were studied as a function of composition and temperature by differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD) and infrared (IR) spectroscopy. The significant changes were observed in the DSC curves, WAXD patterns and IR spectra of the blends with PHB <= 50 wt%. We found that the crystallinity of PHB decreases in the blends, however, its crystal structure is not much affected by blending with chitin. The appearance of a new band at around 1710-1714 cm(-1) clearly reveals the formation of intermolecular hydrogen bondings between the C=O groups of PHB and the O-H and N-H groups of chitin (C=O center dot center dot center dot H-O and C=O center dot center dot center dot H-N). It is very likely that these intermolecular C=O center dot center dot center dot H-N and C=O center dot center dot center dot H-O hydrogen bondings occur in the amorphous phase because of the reduction in the chain mobility in the blends with increasing chitin content, even above the melting temperature of PHB. The C=O center dot center dot center dot H-N and C=O center dot center dot center dot H-O hydrogen bondings are formed upon the cleavage of weak C=O center dot center dot center dot H3C hydrogen bondings of PHB. Thus, the formation of the C=O center dot center dot center dot H-N and C=O center dot center dot center dot H-O hydrogen bondings is accompanied by the decrease in the crystallinity of PHB in the blends. (C) 2015 Elsevier Ltd. All rights reserved.

    ELSEVIER SCI LTD, 2015年09月, POLYMER, 75 (75), 141 - 150, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Harumi Sato, Miriam Unger, Dieter Fischer, Yukihiro Ozaki, Heinz W. Siesler

    Wiley Blackwell, 2015年02月09日, Characterization of Polymer Blends: Miscibility, Morphology and Interfaces, 705 - 730, 英語

    [査読有り]

    論文集(書籍)内論文

  • Daitaro Ishikawa, Daiki Furukawa, Tseng Tsai Wei, Kummetha Raghunatha Reddy, Asako Motomura, Yoko Igarashi, Harumi Sato, Sergei G. Kazarian, Yukihiro Ozaki

    We aimed to achieve wide area rapid monitoring of the crystallinity change in poly(lactic acid) (PLA) during photodegradation caused by ultraviolet (UV) light by using a newly developed near-infrared (NIR) camera (Compovison). Several kinds of PLA samples with different crystallinities and their blends with poly[(3)-(R)-hydroxybutyrate] were prepared. Their two-dimensional NIR spectra in the 1,000-2,350-nm region were measured by Compovision at a 5-min interval during photolysis. An intensity decrease of the band in the 1,900-1,925-nm region due to the second overtone of the C = O stretching vibration of PLA was observed during photolysis. This suggests that an anhydride carbonyl is produced during photolysis. The NIR image of the crystallinity change monitored by the band at 1,917 nm in the standard normal variate spectra clearly shows the inhomogeneity of crystal evolution. A logarithmic increase was observed for all identified areas in the PLA film; however, the time to reach the maximum crystallinity was slightly different according to the initial crystallinity of the sample. It is likely that the initial crystallinity of the sample influences the degradation speed more than the degradation amount. These imaging results have provided fundamental chemical insights into the photolytic process for PLA, and at the same time they have demonstrated that the two-dimensional spectral data obtained by Compovision are useful for process monitoring of polymers.

    SPRINGER HEIDELBERG, 2015年01月, ANALYTICAL AND BIOANALYTICAL CHEMISTRY, 407 (2), 397 - 403, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Yusuke Morisawa, Manaka Yasunaga, Harumi Sato, Ryoichi Fukuda, Masahiro, Ehara, Yukihiro Ozaki

    Attenuated total reflection far ultraviolet (ATR-FUV) spectra in the 145-260 nm region were measured for surfaces (thickness 50-200 nm) of various kinds of nylons in cast films to explore their electronic transitions in the FUV region. ATR-FUV spectra show two major bands near 150 and 200 nm in the surface condensed phase of nylons. Transmittance (Tr) spectra were also observed in particular for the analysis of valence excitations. Time-dependent density functional theory (TD-DFT/CAM-B3LYP) calculations were carried out using the model systems to provide the definitive assignments of their absorption spectra and to elucidate their peak shifts in several nylons, in particular, focusing on their crystal alignment structures and intermolecular hydrogen bondings. Two major bands of nylon films near 150 and 200 nm are characterized as sigma-Rydberg 3p and pi-pi* transitions are relatively localized at the amide group. Differences in the peak positions and intensity were found in both ATR and Tr FUV Spectra for different nylons. A red-shift of the pi-pi* amide band in the FUV spectra of nylon-6 and nylon-6/6 models in alpha form is attributed to the crystal structure pattern and the intermolecular hydrogen bondings, which result in the different delocalization character of the pi-pi* transitions and transition dipole coupling.

    AMER CHEMICAL SOC, 2014年10月, J. Phys. Chem., 118 (40), 11855 - 11861, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Daitaro Ishikawa, Takashi Nishii, Fumiaki Mizuno, Harumi Sato, Sergei G. Kazarian, Yukihiro Ozakia

    This study was carried out to evaluate a new high-speed hyperspectral near-infrared (NIR) camera named Compovision. Quantitative analyses of the crystallinity and crystal evolution of biodegradable polymer, polylactic acid (PLA), and its concentration in PLA/poly-(R)-3-hydroxybutyrate (PHB) blends were investigated using near-infrared (NIR) imaging. This NIR camera can measure two-dimensional NIR spectral data in the 1000-2350 nm region obtaining images with wide field of view of 150 x 250 mm(2) (approximately 100 000 pixels) at high speeds (in less than 5 s). PLA with differing crystallinities between 0 and 50% blended samples with PHB in ratios of 80/20, 60/40, 40/60, 20/80, and pure films of 100% PLA and PHB were prepared. Compovision was used to collect respective NIR spectral data in the 1000-2350 nm region and investigate the crystallinity of PLA and its concentration in the blends. The partial least squares (PLS) regression models for the crystallinity of PLA were developed using absorbance, second derivative, and standard normal variate (SNV) spectra from the most informative region of the spectra, between 1600 and 2000 nm. The predicted results of PLS models achieved using the absorbance and second derivative spectra were fairly good with a root mean square error (RMSE) of less than 6.1% and a determination of coefficient (le) of more than 0.88 for PLS factor 1. The results obtained using the SNV spectra yielded the best prediction with the smallest RMSE of 2.93% and the highest R-2 of 0.976. Moreover, PLS models developed for estimating the concentration of PLA in the blend polymers using SNV spectra gave good predicted results where the RMSE was 4.94% and R-2 was 0.98. The SNV-based models provided the best-predicted results, since it can reduce the effects of the spectral changes induced by the inhomogeneity and the thickness of the samples. Wide area crystal evolution of PLA on a plate where a temperature slope of 70-105 degrees C had occurred was also monitored using MR imaging. An SNV-based image gave an obvious contrast of the crystallinity around the crystal growth area according to slight temperature change. Moreover, it clarified the inhomogeneity of crystal evolution over the significant wide area. These results have proved that the newly developed hyperspectral NIR camera, Compovision, can be successfully used to study polymers for industrial processes, such as monitoring the crystallinity of PLA and the different composition of PLA/PHB blends.

    SAGE PUBLICATIONS INC, 2013年12月, APPLIED SPECTROSCOPY, 67 (12), 1441 - 1446, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Hal Suzuki, Shinya Ishii, Harumi Sato, Shigeki Yamamoto, Yusuke Morisawa, Yukihiro Ozaki, Tetsuji Uchiyama, Chiko Otani, Hiromichi Hoshina

    With the aim of opening a route toward new applications of terahertz (THz) spectroscopy to studies of polymer science, the conformations and structural transitions of polycaprolactam (nylon-6) were investigated by THz spectroscopy in the alpha, gamma, pseudo-hexagonal, and amorphous phases. A Brill transition from the alpha form to the pseudo-hexagonal form was detected at 160 degrees C from a temperature variation of the peak intensity at 6.6 THz in the second-derivative spectrum of nylon-6. In the amorphous phase, a glass transition was observed at 60 degrees C, and a new anomaly was found at 110 degrees C. (C) 2013 Elsevier B. V. All rights reserved.

    ELSEVIER, 2013年06月, CHEMICAL PHYSICS LETTERS, 575, 36 - 39, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Hiromichi Hoshina, Shinya Ishii, Shigeki Yamamoto, Yusuke Morisawa, Harumi Sato, Tetsuji Uchiyama, Yukihiro Ozaki, Chiko Otani

    This paper reviews our recent spectroscopic study on poly(3-hydroxybutyrate) (PHB) for the terahertz (THz) frequency region. Clear differences are observed between the absorption spectra of crystalline and amorphous PHB, indicating that the higher order conformation of PHB determines the THz spectra. The THz polarization spectra are measured for a stretched PHB sample and the directions of the vibrational transition moments are determined. The spectra are found to have temperature dependences owing to which the peaks at lower frequencies shift with temperature, suggesting a large anharmonicity of the vibrational potential. To investigate low frequency vibrational modes more thoroughly, low-frequency Raman spectra are also measured for crystalline PHB. The observed vibrational modes in both THz and Raman spectra were successfully assigned by a quantum mechanical simulation of spectra with the Cartesian coordinate tensor transfer (CCT) method, which can provide realistic spectra of the PHB by considering the intermolecular interactions among polymer chains. The potential of CCT for the assignment of THz spectra is demonstrated. On the basis of these results, the structural change in PHB is studied. The isothermal crystallization of PHB is monitored with the help of THz absorption spectra. The observed spectra clearly show the crystal growth, and the crystallization rate is estimated by Avrami's model. Next, the isothermal crystallization spectra are analyzed using two-dimensional correlation spectroscopy (2DCOS). By using the synchronous and asynchronous data plots, the correlation between the absorption peaks and the temporal order of the changes in spectral intensity is determined.

    IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2013年05月, IEEE Transactions on Terahertz Science and Technology, 3 (3), 248 - 258, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Mriam Unger, Harumi Sato, Yukihiro Ozaki, Dieter Fischer, Heinz W. Siesler

    Variable-temperature Fourier transform infrared spectroscopy (FT-IR) and Raman spectroscopic mapping measurements were applied to study the phase separation of a poly(3-hydroxybutyrate) (PHB) poly(L-lactic acid) (PLA) (50 : 50 wt.%) polymer-blend film as a function of temperature between 25 and 175 degrees C. Because of the better band separation compared with the fundamental absorptions, the first overtones of the v(C=O) bands of PHB and PLA were used to evaluate the temperature-dependent FT-IR images as PLA PHB and PHB PLA band-ratio contour plots, respectively. From the visualization of the band-ratio FT-IR images, it could be derived that even beyond the melting point of PLA (145 degrees C), the lateral position and the geometry of the PHB-rich and PLA-rich phases were retained up to 165 degrees C. Furthermore, the FT-IR images derived during and after the melting of PUB (174 degrees C) provided an interesting insight into the homogenization process of the polymer melt. By exploiting its higher lateral resolution, valuable additional information became available from the Raman mapping measurements. Based on the Raman data, the scenario of phase-separated PHB-rich and PLA-rich domains of about 50 gm size, based on the FT-IR imaging measurements, had to be revised. Instead, the originally interpreted PUB-rich and PLA-rich domains are actually clusters of much smaller grains. Additionally, the Raman images measured in the same temperature interval revealed that the clusters of small PHB-rich grain structures aggregated as a function of temperature increase. These investigations prove that FT-IR and Raman imaging in combination with variable-temperature measurements can provide new (and so far unavailable) insights into structural phenomena of phase-separated polymer blends.

    SOC APPLIED SPECTROSCOPY, 2013年02月, Applied Spectroscopy, 67 (2), 141 - 148, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Shigeki Yamamoto, Yusuke Morisawa, Harumi Sato, Hiromichi Hoshina, Yukihiro Ozaki

    Low-frequency vibrational bands observed in the Raman and terahertz (THz) spectra in the region of 50-150 cm(-1) of crystalline powder poly-(R)-3-hydroxybutyrate (PHB) were assigned based on comparisons of the Raman and THz spectra, polarization directions of THz absorption spectra, and their congruities to quantum mechanically (QM) calculated spectra. This combination, Raman and THz spectroscopies and the QM simulations, has been rarely adopted in spite of its potential of reliable assignments of the vibrational bands. The QM simulation of a spectrum has already been popular in vibrational spectroscopies, but for low-frequency bands of polymers it is still a difficult task due to its large scales of systems and a fact that interactions among polymer chains should be considered in the calculation. In this study, the spectral calculations with the aid of the Cartesian-coordinate tensor transfer (CCT) method were applied successfully to the crystalline PHB, which include the explicit consideration of an intermolecular interaction among helical polymer chains. The agreements between the calculations and the experiments are good in both the Raman and THz spectra in terms of spectral shapes, frequencies, and intensities. A Raman active band at 79 cm(-1) was assigned to the intermolecular vibrational mode of the out-of-plane C=O + CH3 vibration. A polarization state of the corresponding far-infrared absorption band at similar to 82 cm(-1), perpendicular to the helix-elongation direction of PHB, was reproduced only under the explicit correction, which indicates that this polarized band originates from the interaction among the polymer chains. The calculation explored that the polarization direction of this band was along the a axis, which is consistent with the direction in which weak intermolecular hydrogen bonds are suggested between the C=O and CH3 groups of two parallel polymer chains. The results obtained here have confirmed sensitivity of the low-frequency vibrational bands to the weak hydrogen bonds among the polymer chains.

    AMER CHEMICAL SOC, 2013年02月, JOURNAL OF PHYSICAL CHEMISTRY B, 117 (7), 2180 - 2187, 英語

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    研究論文(学術雑誌)

  • Terahertz vibrational spectroscopy of poly(3-hydroxybutyrate) and nylon: Potential of terahertz spectroscopy for polymer science

    Hiromichi Hoshina, Yusuke Morisawa, Shinya Ishii, Harumi Sato, Shigeki Yamamoto, Isao Noda, Yukihiro Ozaki, Chiko Otani, Hal Suzuki

    Terahertz absorption spectra of poly(3-hydroxybutylate) (PHB) and nylon were measured by a terahertz time domain spectrometer and a Fourier transform far-infrared spectrometer. Clear differences were observed between the spectra of crystalline and amorphous PHB, indicating that the absorption peaks observed in the THz spectra originated in the higher-order conformation of PHB. Direction of the vibrational transition moments was obtained by the polarization spectra of stretched sample in which the crystal axis were aligned. On the basis of these results, the structural change in PHB is studied. The isothermal crystallization of PHB is monitored with the help of THz absorption spectra. The observed spectra clearly show the crystal growth, and the crystallization rate is estimated by Avrami's model. The higher order conformations of the nylon were determined by the X-ray diffraction measurement. Different spectral features among the samples were interpreted

    IEEE, 2013年, PROCEEDINGS OF THE 2013 IEEE INTERNATIONAL CONFERENCE ON SOLID DIELECTRICS (ICSD 2013), VOLS 1 AND 2, 497 - 500, 英語

    [査読有り]

    研究論文(国際会議プロシーディングス)

  • Xinlei Yan, Toshiaki Suzuki, Yasutaka Kitahama, Harumi Sato, Tamitake Itoh, Yukihiro Ozaki

    Normal Raman and tip-enhanced Raman scattering (TERS) spectra were recorded for single-walled carbon nanotube (SWCNT)-polystyrene (PS) nanocomposites to investigate the distribution of SWCNTs in the nanocomposites and local interactions at an interface between SWCNTs and PS. The normal Raman spectra do not show an evident point-to-point variation. In contrast, in the TERS spectra, Raman bands of SWCNTs show obvious point-to-point shifts; the shifts depend on the points. The shift of the G' band which has high sensitivity to the mechanical compression reflects its distribution at the surface of composites. The shift of the G band arises from two reasons: the disentanglement of SWCNTs in the SWCNT-PS system due to the penetration of PS chains into SWCNT bundles during melt mixing and the mechanical compression distribution from the PS matrix. Moreover, the relative intensity of the G' band and the Raman band of PS at 3058 cm(-1) changes with the points in the TERS spectra of the nanocomposites, which further reflects the dispersion state of SWCNTs in the polymer matrix. This study demonstrates that TERS has great potential to be applied to polymer nanocomposite materials for local structure and function studies.

    ROYAL SOC CHEMISTRY, 2013年, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 15 (47), 20618 - 20624, 英語

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    研究論文(学術雑誌)

  • Toshiaki Suzuki, Xinlei Yan, Yasutaka Kitahama, Harumi Sato, Tamitake Itoh, Takeshi Miura, Yukihiro Ozaki

    Tip-enhanced Raman scattering (TERS) spectral measurements of nanocomposite styrene butadiene rubber (SBR) and multiwalled carbon nanotubes (MWCNTs) films were used to explore the local molecular interaction between nanocomposites. TERS spectra from geographically separated points were attributable to SBR or MWCNTs, showing great potential for investigating local film inhomogeneity within several tens of nanometers. Such inhomogeneity has never been observed by confocal Raman measurements. TERS bands due to SBR phenyl groups were strong when MWCNT bands were strong, whereas vinyl-group TERS bands were strong when the MWCNT bands were weak. Analysis of the findings suggests that the local distribution Of polymer chains is modified with changes in the orientation of the phenyl rings by pi-pi interactions between the polymer chains and the MWCNTs.

    AMER CHEMICAL SOC, 2013年01月, J. Phys. Chem. C, 117 (3), 1436 - 1440, 英語

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    研究論文(学術雑誌)

  • Xinlei Yan, Tamitake Itoh, Yasutaka Kitahama, Toshiaki Suzuki, Harumi Sato, Takeshi Miyake, Yukihiro Ozaki

    Single-wall carbon nanotube/polystyrene (SWCNT/PS) nanocomposites were prepared by solution coagulation. Characterization was performed using Raman and infrared spectroscopy. to elucidate the interactions between the SWCNTs and PS inside the nanocoiriposites. It was found that the G(-), G(+), and G' SWCNT bands shifted, to higher wavenumbers when incorporated into the nanocomposites.. We determined that this upshift was induced exclusively by a mechanical compression transfer from PS to the SWCNTs. From the magnitude of the upshift, the mechanical compression transfer was estimated to be similar to 518 MPa. Interestingly, we found that the upshift of the radial breathing mode was dominated by two factors: a van der Waals effect due to separation of the SWCNTs and mechanical compression from the PS system. A comparison of the laser heating effects on pristine SWCNTs arid on the nanocomposites showed that thermal expansion. of the SWCNTs in the nanocomposites was suppressed by the mechanical compression from the PS system. The combination of Raman and infrared spectroscopy enabled detailed characterization of the interactions occurring the nanocomposites, which cannot be achieved using other conventional methods.

    AMER CHEMICAL SOC, 2012年08月, JOURNAL OF PHYSICAL CHEMISTRY C, 116 (33), 17897 - 17903, 英語

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    研究論文(学術雑誌)

  • Yusuke Morisawa, Shin Tachibana, Manaka Yasunaga, Motoki Mitsuoka, Harumi Sato, Akifumi Ikehata, Noboru Higashi, Yukihiro Ozaki

    Spectroscopic studies in the far-UV (FUV) region (120-200 nm) are very attractive for both basic sciences and applications, since various kinds of electronic transitions are observed in the region. However, because of very large absorption coefficients, full-scale FUV spectra for liquids and solids could not be measured easily. We have recently developed a totally new FUV spectrometer based on attenuated total reflection (ATR) that enables us to measure the full-scale spectra of liquid and solid samples in the 140-200 nm region. In this paper, at first we outline the characteristics and advantages of the FUV spectroscopy, and then discuss our studies on the development of an ATR-FUV spectrometer and its applications to analytical chemistry. At the end, we introduce our newly developing time-resolved ATR-FUV spectrometer.

    JAPAN SOC ANALYTICAL CHEMISTRY, 2012年07月, BUNSEKI KAGAKU, 61 (7), 591 - 603, 日本語

    [査読有り]

    研究論文(学術雑誌)

  • Yohei Ando, Harumi Sato, Hideyuki Shinzawa, Masami Okamoto, Isao Noda, Yukihiro Ozaki

    Isothermal melt crystallization behavior of neat poly(L-lactide) (PLLA) and PLLA/organically modified layered silicate (OMLS)nanocomposite was studied by using time-dependent infrared (IR) spectroscopy and transmission electron microscopy (TEM). Sets of time-dependent IR spectra reflecting the crystallization from the melt of the neat PLLA and PLLA/OMLS nanocomposite were collected at 105 C. Fine details of the crystallization behaviors were analyzed by two-dimensional (2D) correlation spectroscopy, and significant differences in the crystallization behaviors depending on the presence of OMLS were revealed. Namely, it was found that the crystalline lamellae of the PLLA nanocomposite grow along the layered silicate, while the orientation of the neat PLLA resulted in more disordered orientation because of the absence of the OMLS. The result derived from the 2D correlation analysis of the time-dependent IR spectra of PLLA samples showed good agreement with corresponding TEM images. (C) 2012 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2012年05月, VIBRATIONAL SPECTROSCOPY, 60, 158 - 162, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Harumi Sato, Nattaporn Suttiwijitpukdee, Takeji Hashimoto, Yukihiro Ozaki

    Self-assembly of poly(3-hydroxybutyrate) (PHB) and cellulose acetate butyrate (CAB) blends prepared by solvent casting was investigated by simultaneous synchrotron small-angle X-ray scattering (SAXS) and wide-angle X-ray diffraction as a function of temperature in a heating process of the blends. The results revealed different elemental processes occurring in three characteristic temperature regions: (1) low-T region, where cold crystallization (CC) of PHB into one-dimensional (1D) assemblies of PHB lamellar crystals occurs in the temperature (T) range T-cc,T-PHB <= T <= T-cc,T-CAB, where T-cc,T-PHB and T-cc,T-CAB are the onset temperature for CC in PHB and CAB, respectively; (2) crossover-T region, where partial melting/recrystallintion of PHB occurs concurrently with CC of CAB in the interstitial amorphous matrix among the ID PHB lamellar assemblies at T-cc,T-CAB < T <= T*, where T* is a characteristic temperature close to the T at the higher melting endothermic peak of differential scanning calorimetry (DSC), T-m,T-DSC; and (3) high-T region, where PHB crystals melt and CAB partially melts/recrystallizes at T > T*. The study also elucidated for the first time in this blend systems, to our best knowledge, the following points: (a) the existence of two glass transition temperatures (T-g's) in the amorphous matrix, with a lower T-g (T-gl) determined by DSC and a higher T-g (T-g,T-h) determined from the SAXS intensity at low q (magnitude of the scattering vector) values as a function of T; (b) the evolution of the large length-scale composition fluctuations in the amorphous matrix of the blend at T-g,T-h <= T <= T-cc,T-CAB; (c) crystallization of CAB at T > T-cc,T-CAB and a melting temperature for CAB crystals higher than 183 degrees C. The roles of intermolecular hydrogen bondings (HBs) between PHB and CAB, intramolecular HBs within PHB, and those within CAB as well as roles of the exchanges of those HBs on the self-assembling process, the composition fluctuations, and the miscibility of the blends in the amorphous phase were also clarified in the text.

    AMER CHEMICAL SOC, 2012年03月, MACROMOLECULES, 45 (6), 2783 - 2795, 英語

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    研究論文(学術雑誌)

  • Nattaporn Suttiwijitpukdee, Harumi Sato, Miriam Unger, Yukihiro Ozaki

    The crystal melting behaviors of poly(3-hydroxybutyrate) (PHB) and cellulose acetate butyrate (CAB) blends were studied using infrared (IR) and near-infrared (NIR) imaging, which provided information about spherulite growth in dynamic blend systems. By analyzing the changes in the IR and NIR imaging spectra in the regions of the first and second overtones of the C=O stretching vibrations of PHB and CAB, the evolution of heterogeneous spherulite during the time-resolved isothermal crystallization process was explored. Time-resolved IR and NIR imaging and polarized microscopic studies detected the PHB domains are able to separate from the PHB/CAB blends early in the process. Principal component analysis (PCA) was used to classify the distribution of the different morphologies of spherulite. The first principal component suggests that the discrimination of the imaging spectra relies largely upon the crystallinity, while the second principal component indicates the variations in the amorphous portion of PHB, the CAB contents, and the intermolecular hydrogen bonding of PHB and CAB. The PC1-PC2 scores of different parts of the spherulite suggest that the areas of low crystallinity in the blend spherulite contain both PHB and CAB.

    AMER CHEMICAL SOC, 2012年03月, MACROMOLECULES, 45 (6), 2738 - 2748, 英語

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    研究論文(学術雑誌)

  • Hiromichi Hoshina, Shinya Ishii, Yusuke Morisawa, Harumi Sato, Isao Noda, Yukihiro Ozaki, Chiko Otani

    The isothermal crystallization of poly(3-hydroxybutylate) (PHB) was studied by monitoring the temporal evolution of terahertz absorption spectra in conjunction with spectral analysis using two-dimensional correlation spectroscopy. Correlation between the absorption peaks and the sequential order of the changes in spectral intensity extracted from synchronous and asynchronous plots indicated that crystallization of PHB at 90 degrees C is a two step process, in which C-H center dot center dot center dot O=C hydrogen bonds are initially formed before well-defined crystal structures are established. (C) 2012 American Institute of Physics. [doi:10.1063/1.3673847]

    AMER INST PHYSICS, 2012年01月, APPLIED PHYSICS LETTERS, 100 (1), 英語

    [査読有り]

    研究論文(学術雑誌)

  • Longhai Guo, Nicolas Spegazzini, Harumi Sato, Takeji Hashimoto, Hiroyasu Masunaga, Sono Sasaki, Masaki Takata, Yukihiro Ozaki

    We explored the isothermal crystallization process of poly(3-hydroxybutyrate) by means of simultaneous measurements of time-resolved wide-angle X-ray diffraction (tr-WAXD) and small-angle X-ray scattering (tr-SAXS) methods. The tr-WAXD analyses involve not only (1) a precise analysis of the integral widths but also the analyses such as (2) two-dimensional correlation spectroscopy (2D-COS) and (3) multivariate curve resolution alternating least squares (MCR-ALS). The tr-SAXS analyses involve not only (4) the conventional one-dimensional correlation function analysis but also the analyses such as (5) 2D-COS between tr-SAXS and tr-WAXD profiles and (6) 2D-COS of tr-SAXS profiles themselves. These analyses elucidated a multistep crystallization process as classified by region I to III in order of the increasing time. In region I, the density fluctuations are first built up in the amorphous matrix, and then the density-rich regions locally develop "intermediate structures" having the mesomorphic orders between pure amorphous melts and pure crystals [lamellar crystallites (LC)], which then grow into layers of the intermediate structures [defined as mesomorphic layers (ML)] with the long spacings. These results were elucidated by analysis (5) and (6). In region II, LC start to be created from ML, which was elucidated by analysis (1) to (4), and both of the weight fractions of ML (X-inter) and LC (X-crys) increase with time [analysis (3)]. In region III, X-inter, and X-crys, decreases and increases with time, respectively [analysis (3)], because the transformation form ML to LC dominates the transformation from the density fluctuations to ML. The WAXD profiles due to ML in region I was identified by analysis (1), while those in regions H and III were identified by analysis (3).

    AMER CHEMICAL SOC, 2012年01月, MACROMOLECULES, 45 (1), 313 - 328, 英語

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    研究論文(学術雑誌)

  • Xinlei Yan, Yasutaka Kitahama, Harumi Sato, Toshiaki Suzuki, Xiaoxia Han, Tamitake Itoh, Liliane Bokobza, Yukihiro Ozaki

    The laser heating effect on MWCNTs in styrene-butadiene rubber/multiwalled carbon nanotube (SBR/MWCNT) composites were studied by Raman spectra. The intensity ratio of the D band to G band (I-D/I-G) of SBR/MWCNT composites largely decreased with temperature. This indicates the self-rearranging behavior of MWCNTs in the SBR/MWCNTs system during temperature increase. In addition, the temperature-dependent downward shift of the G band of SBR/MWCNT composites was smaller than that of MWCNTs samples. The self-rearrangement of MWCNTs in SBR/MWCNT composites and a mechanical compression were explained as two possible reasons for the different behavior of the G band shift. (C) 2011 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2012年01月, CHEMICAL PHYSICS LETTERS, 523, 87 - 91, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Xiaoli Sun, Longhai Guo, Harumi Sato, Yukihiro Ozaki, Shouke Yan, Isao Takahashi

    The exact molecular chain orientation of poly(beta-hydroxybutyrate) (PHB) in ultrathin films was successfully probed using surface-sensitive, grazing incidence X-ray diffraction techniques. The crystal orientation of spin-coated PHB films was very sensitive to free surface and thermal annealing. In pristine films, the free surface easily exerted its influence on PHB crystallization and caused lamellar orientation with the b-axis perpendicular to the film surface. The effect of the buried interface increased with temperature. With the increase in thermal annealing temperature, the lamellar orientation changed from the b-axis being perpendicular to the film surface to the c-axis becoming perpendicular to the film surface. As film thickness increased, the temperature, at which the lamellae with the b-axes oriented normal to the film surface disappeared, increased. The thickness and temperature dependence of the crystallization behavior of PHB in an ultrathin film could be attributed to the competition between the effects of the free surface and the buried interface. (C) 2011 Elsevier Ltd. All rights reserved.

    ELSEVIER SCI LTD, 2011年08月, POLYMER, 52 (17), 3865 - 3870, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Nattaporn Suttiwijitpukdee, Harumi Sato, Jianming Zhang, Takeji Hashimoto

    Effects of hydrogen bondings (HBs) on the isothermal crystallization kinetics and mechanisms of poly(3-hydroxybutyrate) (PHB) in neat PHB and its blends with cellulose acetate butyrate (CAB), amorphous melts at the crystallization temperature, were investigated by using time-resolved Fourier transform infrared spectroscopy (FTIR). The FTIR investigation focused on the characteristic bands of PHB in the crystalline phase and in the amorphous phase. The results revealed the following pieces of evidence. (1) The crystallization of PHB in both neat PHB and PHB/CAB blends commonly involves a multistep process: (i) transformation from amorphous melts to an intermediated structure between amorphous and crystals (process (b1) shown above), (ii) from the intermediate structure to crystals without intramolecular HBs (intra) (b2), and (iii) finally to crystals with intra (b3). (2) These transformations sequentially occur with increasing time. More specifically, the transformations (ii) and (iii) dominantly occur respectively in the primary and secondary crystallization process in both neat PHB and the blends. The Avrami analysis revealed that (3) the crystallization in both neat PHB and the blends involves essentially the same nucleation and growth mechanism, as evidenced by almost the same value of the Avrami exponent n; however (4) the crystallization rate constant k(A), also determined from the Avrami analysis, is strikingly reduced by blending CAB (see the k(A) value for the PHB/HCAB blend in the text), which is attributed to physical cross-links formed by intermolecular HBs between PHB and CAB in addition to molecular entanglements.

    AMER CHEMICAL SOC, 2011年05月, MACROMOLECULES, 44 (9), 3467 - 3477, 英語

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    研究論文(学術雑誌)

  • Harumi Sato, Yuriko Ando, Hiroshi Mitomo, Yukihiro Ozaki

    Thermal behavior and lamella structures of poly(3-hydroxybutyrate-co-3-hydroxyvalerate), hereafter P(HB-co-HV) (Fly = 9, 15, 21, 28.8, 58.4, 73.9, and 88.6 mol %), were investigated using infrared (IR) spectroscopy, wide-angle X-ray diffraction (WAX])), and differential scanning calorimetry (DSC). Temperature-dependent IR and WAX]) measurements revealed that P(HB-co-HV) with low HV content (HV = 9, 15, and 21 mol %) has a PHB-type crystal structure with CH(3)center dot center dot center dot O=C hydrogen bonds, whereas P((HB-co-HV) with high HV content (HV = 73.9 and 88.6 mol %) has a PHV-type crystal structure with CH(2)center dot center dot center dot O=C hydrogen bonds. The results of IR measurements showed that the strength of the CH(3)center dot center dot center dot O=C hydrogen bonds in the P(HB-co-HV) (HV = 9, 15, and 21 mol %) copolymers is almost the same as that in PHB, whereas in the P(HB-co-HV) (HV = 28.8 mol %) copolymer, the hydrogen bonds become weaker. In the case of P(HB-co-HV) with higher HV content (MV = 73.9 and 88.6 mol %), the effect of lamella packing on CH(2)center dot center dot center dot O=C hydrogen bonding in the PHV crystal is not considerable because the side chain of the HB unit is shorter than that of the HV unit. Additionally, it seems that in the crystal structure of P(HB-co-HV) (HV = 58.4 mol %) there ire only very weak intermolecular interactions between a C=O group and either a CH(2) group or a CH(3) group because the region of transition of the crystal structure of P (HB-co-HV) from the PHB type to the PHV type occurs at around 50 mol % HV content. Therefore, it is very much possible that with increasing temperature the crystal structure of P(HB-co-HV) (HV = 58.4 mol %) is more likely to collapse than other P(HB-co-HV) copolymers.

    AMER CHEMICAL SOC, 2011年04月, MACROMOLECULES, 44 (8), 2829 - 2837, 英語

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    研究論文(学術雑誌)

  • Longhai Guo, Harumi Sato, Takeji Hashimoto, Yukihiro Ozaki

    2011年03月, Macromolecules, 44, 2229-2239, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Shin Tachibana, Yusuke Morisawa, Akifumi Ikehata, Harumi Sato, Noboru Higashi, Yukihiro Ozaki

    Far-ultraviolet (FUV) spectra of n-alkanes (n = 5-14) and branched alkanes were measured in their liquid state by using a newly developed attenuated total reflection (ATR)-FUV spectrometer to investigate spectra structure relationship in the FUV region. The n-alkanes show a broad band near 8.3 eV and a weak shoulder near 7.7 eV. The 8.3 eV band shows a lower energy shift with a significant intensity increase with the increase in the length of alkyl chain. We have assigned the 8.3 eV band to the overlap of two bands due to the transition from the highest occupied molecular orbital (HOMO) to 3p and that from the HOMO-1 to 3s based on the observation that the peak energy of the 8.3 eV band of the n-alkanes is proportional to the first ionization energy. The 7.7 eV shoulder may be due to the transition from HOMO to 3s. The intensity of the 7.7 eV band increases markedly in the order n-alkanes without branch, with tertiary, and with quaternary carbon atoms. It is very likely that the forbidden transition from HOMO to 3s becomes allowed by the large decrease in symmetry upon going from the n-alkanes to the branched ones with the quaternary carbon, respectively.

    SAGE PUBLICATIONS INC, 2011年02月, APPLIED SPECTROSCOPY, 65 (2), 221 - 226, 英語

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    研究論文(学術雑誌)

  • Harumi Sato, Yukihiro Ozaki, Jianhui Jiang, Ru-Qin Yu, Hideyuki Shinzawa

    John Wiley and Sons, 2011年01月26日, Raman, Infrared, and Near-Infrared Chemical Imaging, 261 - 281, 英語

    [査読有り]

    論文集(書籍)内論文

  • Hiromichi Hoshina, Yusuke Morisawa, Harumi Sato, Hiroaki Minamide, Isao Noda, Yukihiro Ozaki, Chiko Otani

    Temperature-dependent terahertz (THz) absorption spectra of poly(3-hydroxyalkanoate)s (PHAs) were measured by using a Fourier transform far-infrared (FT-FIR) spectrometer and a THz time-domain spectrometer over a temperature range of 10 K to 465 K with a liquid helium cryostat and a heating cell. Clear differences were observed between the spectra of crystalline and amorphous polyhydroxybutyrate (PHB), indicating that the absorption peaks observed in the THz spectra originated in the higher-order conformation of PHB. The polarization spectra of a stretched PHB sample were measured, and the direction of the vibrational transition moment was determined. The temperature dependences of the spectra reveal frequency shifts and broadening of the absorption peaks with temperature, suggesting large anharmonicity of the vibrational potential. The temperature shift behaviour is quite different in each transition. Some of the transitions show a blue shift, which cannot be explained by a simple anharmonic potential model. Frequency shifts of the peaks were mainly observed below 10 THz, which suggests a large anharmonicity of the vibrational potential at lower frequencies.

    ROYAL SOC CHEMISTRY, 2011年, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 13 (20), 9173 - 9179, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Terahertz Spectroscopy of Poly(3-hydroxyalkanoate)s

    Hiromichi Hoshina, Yusuke Morisawa, Shinya Ishii, Harumi Sato, Isao Noda, Yukihiro Ozaki, Chiko Otani

    Terahertz (THz) absorption spectra of poly(3-hydroxyalkanotes) (PHA) were measured by a terahertz timedomain spectrometer and Fourier transform far-infrared spectrometer. Clear differences were observed between the spectra of crystalline and amorphous PHA, indicating that the absorption peaks observed in the THz spectra originated in the higher-order conformation of PHA. Direction of the vibrational transition moments was obtained by the polarization spectra of stretched sample in which the crystal axis were aligned. THz spectra were also measured over a temperature range from 10 K to 465 K with a liquid helium cryostat and a heating cell. The temperature dependences of the spectra reveal frequency shifts and broadening of the absorption peaks with temperature, suggesting large anharmonicity of the vibrational potential.

    IEEE, 2011年, 2011 ANNUAL REPORT CONFERENCE ON ELECTRICAL INSULATION AND DIELECTRIC PHENOMENA, VOLS 1 AND 2, 195 - 198, 英語

    [査読有り]

    研究論文(国際会議プロシーディングス)

  • Nattaporn Suttiwijitpukdee, Harumi Sato, Jianming Zhang, Takeji Hashimoto, Yukihiro Ozaki

    Relationships between composition- and temperature-dependent intermolecular interactions and cold crystallization behaviors of poly(3-hydroxybutyrate) (PHB)/ cellulose acetate butyrate (CAB) blends have been investigated mainly by infrared (IR) spectroscopy, together with differential scanning calorimetry, and wide-angle X-ray diffraction (WAXD). Weak intermolecular hydrogen bondings between OH groups in CAB and C=O groups in amorphous part of PHB define as inter were detected in OH stretching bands of the blends. These interactions occur in the blends with high CAB content (w(CAB)) and highly depend on temperature. For all the blends having 0.2 <= w(CAB) <= 0.7, when temperature is raised (e.g., above 90 degrees C for the blend with w(CAB) = 0.5) the cold crystallization of PHB was discerned, as evidenced by an increase of the absorbance of the band due to C=O stretching in the crystal field. The crystallization was found to involve the dissociation of inter and transformation of inter into intramolecular hydrogen bondings within PHB and within CAB as summarized in Table 2 in this text, which promotes the crystallization and enhances stabilization of the crystals. Consequently, the crystallization of the PHB is influenced by exchanges of the hydrogen bondings as described above with raising temperatures. X-ray diffraction from PHB crystals in the blends show a remarkable decrease of crystallinity with w(CAB) and eventually disappear when w(CAB) >= 0.8. (C) 2010 Elsevier Ltd. All rights reserved.

    ELSEVIER SCI LTD, 2011年01月, POLYMER, 52 (2), 461 - 471, 英語

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    研究論文(学術雑誌)

  • Miriam Unger, Harumi Sato, Yukihiro Ozaki, Heinz W. Siesler

    Variable-temperature FT-IR spectra of poly(3-hydroxybutyrate) (PHB), poly(epsilon-caprolactone) (PCL) and a PHB/PCL (50:50 wt.%) blend were analyzed by two-dimensional correlation spectroscopy (2DCOS). For this purpose the nu(C=O) region was employed to characterize in some detail the crystallization behavior of the investigated polymer systems during cooling from the melt. The asynchronous 2D correlation spectra clearly captured the existence of three components in the crystallinity-sensitive region of the C=O stretching mode for PHB and PCL, respectively: a well-ordered, an inter-mediate and a less ordered crystalline state. Furthermore, by 2DCOS application a sequential order of the observed structural changes could be proposed for the whole temperature range during the crystallization of both polymers. In the case of the PHB/PCL (50:50 wt.%) polymer blend, we have split up the spectral data set in the sub-sets between 200-120 degrees C and 70-30 degrees C for a more detailed 2DCOS analysis. In this way we could separate the crystallization process of PHB and PCL in the polymer blend.

    WILEY-V C H VERLAG GMBH, 2011年, POLYMER SPECTROSCOPY, 305, 英語

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    研究論文(国際会議プロシーディングス)

  • Hiromichi Hoshina, Shinya Ishii, Yusuke Morisawa, Harumi Sato, Isao Noda, Yukihiro Ozaki, Chiko Otani

    Isothermal crystallization of poly(3-hydroxybutylate) was observed by the temporal change of terahertz absorption spectra. The obtained spectra were analyzed by using two-dimensional correlation spectroscopy. Synchronous and asynchronous plots show the correlation of the absorption peaks and the order of the spectral change, which helps to understand the crystallization process.

    IEEE, 2011年, 2011 36TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ), 100, 011907-1-3, 英語

    [査読有り]

    研究論文(国際会議プロシーディングス)

  • Hiromichi Hoshina, Yusuke Morisawa, Harumi Sato, Akitsugu Kamiya, Isao Noda, Yukihiro Ozaki, Chiko Otani

    Terahertz absorption spectra of poly (3-hydroxyalkanoates) with different conformations were measured by using a terahertz time domain spectrometer. Sharp absorption peaks were observed in the spectrum of crystalline samples. The orientation direction of the transition dipole moment was investigated by the polarization spectra. The peak at 2.92 THz was assigned to a vibration of helical structure along the fiber axis, and the peak at 2.49 THz was attributed to a vibration due to the hydrogen bonding between helix structures. The temperature dependence of the spectra reflects the change in the hydrogen bonding distance and melting process of the crystalline structure. (C) 2010 American Institute of Physics. [doi:10.1063/1.3358146]

    AMER INST PHYSICS, 2010年03月, APPLIED PHYSICS LETTERS, 96 (10), 英語

    [査読有り]

    研究論文(学術雑誌)

  • Masaki Kajino, Tomotaka Saitou, Masami Okamoto, Harumi Sato, Yukihiro Ozaki

    2010年03月, Applied Clay Science, 48, 73–80, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Longhai Guo, Harumi Sato, Takeji Hashimoto, Yukihiro Ozaki

    2010年03月, Macromolecules, 43, 3897–3902, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Hiromichi Hoshina, Yusuke Morisawa, Harumi Sato, Isao Noda, Yukihiro Ozaki, Chiko Otani

    Terahertz absorption spectra of Poly(3-hydroxybutyrate)s were measured. The orientation of the transition dipole moment was investigated by the polarization spectra. The temperature dependence of the spectra reflects the change in the hydrogen bonding distance of the crystalline structure.

    IEEE, 2010年, 35TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ 2010), 96, 101904, 英語

    [査読有り]

    研究論文(国際会議プロシーディングス)

  • Variable-Temperature Fourier Transform Infrared Spectroscopic Investigations of Poly(3-Hydroxyalkanoates) and Perturbation-Correlation Moving-Window Two-Dimensional Correlation Analysis. Part II: Study of Poly(epsilon-Caprolactone) Homopolymer and a Poly(3-Hydroxybutyrate)-Poly(epsilon-Caprolactone) Blend

    Miriam Unger, Shigeaki Morita, Harumi Sato, Yukihiro Ozaki, Heinz W. Siesler

    In the present study, variable-temperature Fourier transform infrared (FT-IR) spectra of a poly(epsilon-caprolactone) (PCL) homopolymer and a poly(3-hydroxybutyrate) (PHB)-poly(epsilon-caprolactone) (PCL) blend were analyzed by generalized two-dimensional correlation spectroscopy (2DCOS) and perturbation-correlation moving-window two-dimensional (PCMW2D) correlation spectroscopy. The C=O stretching vibration bands of PCL and PHB were employed to explore the structural changes in the PCL homopolymer and the PHB-PCL blend during the heating process. For the melting of PCL homopolymer in the temperature range of 50 to 70 degrees C, we observed in the synchronous and asynchronous 2D correlation spectra one crystalline (1724 cm(-1)) and one amorphous (1737 cm(-1)) C=O stretching vibration band, which are also detectable in the one-dimensional FT-IR spectra. This result was also confirmed by PCMW2D correlation spectroscopy. During the heating process of the PHB-PCL blend in the temperature range 3(),-200 degrees C, the PCMW2D correlation analysis provided detailed information. Thus, in the synchronous PCMW2D correlation spectrum the melting of PCL was observed in the temperature region between 30 and 70 degrees C. The recrystallization of PHB in the blend in the temperature range 70-120 degrees C was accompanied by a shift of the C=O stretching band from higher wavenumber (1724 cm(-1)) corresponding to an imperfect crystalline state to the lower wavenumber (1721 cm(-1)) characteristic of a well-ordered crystalline state. In the temperature range 120-200 degrees C the melting process of PHB in the blend is captured by a sharp transition from the crystalline (1722 cm(-1)) to the amorphous (1747 cm(-1)) C=O stretching band.

    SOC APPLIED SPECTROSCOPY, 2009年09月, APPLIED SPECTROSCOPY, 63 (9), 1034 - 1040, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Miriam Unger, Shigeaki Morita, Harumi Sato, Yukihiro Ozaki, Heinz W. Siesler

    Generalized two-dimensional correlation spectroscopy (2DCOS) and perturbation-correlation moving-window two-dimensional (PCMW2D) correlation spectroscopy were applied to explore the melting behavior of non-annealed and annealed poly(3-hydroxybutyrate) (PHB) homopolymer as studied by variable-temperature Fourier transform infrared (FT-IR) spectroscopy. The absorption band of the C=O stretching vibration was employed to investigate the structural changes during the heating process (30-200 degrees C). Non-annealed PHB showed a recrystallization process in the temperature range 30-120 degrees C. In the asynchronous 2D correlation spectrum we clearly captured the existence of two components in the crystallinity-sensitive wing of the C=O stretching mode: a well-ordered crystalline state at lower wavenumbers (1718 cm(-1)) and a less ordered crystalline state at higher wavenumbers (1724 cm(-1)). These crystallinity-sensitive bands at 1718 and 1724 cm(-1), which are not readily detectable in the one-dimensional (ID) FT-IR spectra, share asynchronous cross-peaks with bands at around 1737 and 1747 cm(-1) assignable to the C=O stretching absorptions due to the amorphous components. In the case of the melting process of non-annealed PHB in the temperature range 120-200 degrees C, it is helpful to use the PCMW2D correlation analysis, which indicates the recrystallization between 40 and 110 degrees C by the shift of the C=O stretching band from 1726 cm-1 to 1722 cm-1 and the sharp change to the broad amorphous C=O stretching absorption at 1747 cm(-1) at the melting temperature of PHB around 190 degrees C. For an annealed sample of PHB only the melting behavior was observed in the PCMW2D correlation analysis by the sharp transition from the crystalline to the amorphous C=O stretching band.

    SOC APPLIED SPECTROSCOPY, 2009年09月, APPLIED SPECTROSCOPY, 63 (9), 1027 - 1033, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Harumi Sato, Rumi Murakami, Katsuhito Mori, Yuriko Ando, Isao Takahashi, Isao Noda, Yukihiro Ozaki

    Infrared reflection-absorption (IR-RAS) and transmission spectra were measured for poly(3-hydroxybutyrate) (PHB) thin films to explore its specific crystal structure in the Surface region. As IR-RAS is sensitive to the vibration mode of perpendicular orientation of the surface, differences between IR-RAS and transmission spectra indicate an orientation of the lamella structure in the surface of PHB thin films. The relative intensity of the Crystalline C=O Stretching band in the IR-RAS spectrum is significantly weaker than that in the transmission spectrum. It may be concluded that the transient dipole moment of the C=O stretching mode of the crystalline state is not oriented perpendicular but nearly parallel to the substrate surface. On the other hand, the relative intensity of the band at 3009 cm(-1) due to the C-H stretching mode of the C-H... O=C hydrogen bonding is similar between the IR-RAS and transmission spectra, suggesting that the C-H bond is oriented neither perpendicular nor parallel to the substrate surface but in an intermediate direction. Since the C=O group of the C-H center dot center dot center dot O=C hydrogen bonding is oriented nearly parallel to the surface and its C-H group is in the intermediate direction, it is very likely that the C-H center dot center dot center dot O=C hydrogen bonding has a somewhat bent structure. These results are in good agreement with our previous conclusion that the C-H center dot center dot center dot O=C hydrogen bonding of PHB exists along the a-axis (not the b-axis) between the CH(3) group of one helix and the C=O group of another helix. (C) 2008 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2009年09月, Vibrational Spectroscopy, 51 (1), 132 - 135, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Miriam Unger, Shigeaki Morita, Harumi Sato, Yukihiro Ozaki, Heinz Siesler

    In the present study, variable-temperature Fourier transform infrared (FT-IR) spectra of a poly(ε-caprolactone) (PCL) homopolymer and a poly(3-hydroxybutyrate) (PHB)-poly(ε-caprolactone) (PCL) blend were analyzed by generalized two-dimensional correlation spectroscopy (2DCOS) and perturbation-correlation moving-window two-dimensional (PCMW2D) correlation spectroscopy. The C=O stretching vibration bands of PCL and PHB were employed to explore the structural changes in the PCL homopolymer and the PHB-PCL blend during the heating process. For the melting of PCL homopolymer in the temperature range of 50 to 70 °C, we observed in the synchronous and asynchronous 2D correlation spectra one crystalline (1724 cm-1) and one amorphous (1737 cm-1) C=O stretching vibration band, which are also detectable in the one-dimensional FT-IR spectra. This result was also confirmed by PCMW2D correlation spectroscopy. During the heating process of the PHB-PCL blend in the temperature range 30-200 °C, the PCMW2D correlation analysis provided detailed information. Thus, in the synchronous PCMW2D correlation spectrum the melting of PCL was observed in the temperature region between 30 and 70 °C. The recrystallization of PHB in the blend in the temperature range 70-120 °C was accompanied by a shift of the C=O stretching band from higher wavenumber (1724 cm-1) corresponding to an imperfect crystalline state to the lower wavenumber (1721 cm-1) characteristic of a well-ordered crystalline state. In the temperature range 120-200 °C the melting process of PHB in the blend is captured by a sharp transition from the crystalline (1722 cm-1) to the amorphous (1747 cm-1) C=O stretching band. © 2009 Society for Applied Spectroscopy.

    2009年09月, Appl. Spectrosc., 63 (9), 1034 - 1040, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Huizhen Li, Yanjie Wu, Harumi Sato, Lei Kong, Chengfeng Zhang, Kun Huang, Dongliang Tao, Jing Chen, Xuexin Liu, Ying Zhao, Yizhuang Xu, Jinguang Wu, Yukihiro Ozaki

    In this study, we develop a new facile method to prepare nylon-6 with special features (denoted as vp-nylon-6). The key strategy for the method is to make the crystallization of nylon-6 be performed in a slow and near-equilibrium manner by diffusing the vapor of precipitator into a nylon 6/formic acid solution at ambient temperature and pressure. Differential scanning calorimeter (DSC) and wide angle X-ray diffraction (WAXD) have demonstrated that the crystallinity and crystalline perfection of vp-nylon-6 ire significantly improved by the new method. Scanning electron microscope (SEM) observations have shown that vp-nylon-6 exhibits versatile morphological feature including ribbon, bowknot, flower, semisphere, and dumbbell which are the result of the assembly of crystalline lamellae. The crystalline lamellae occur in a discrete fashion rather than being embedded in an amorphous matrix even if concentrated nylon Solutions are used. Selected area electron diffraction (SAED) in transmission electron microscope (TEM) shows that the crystalline lamellae are composed of single crystals.

    AMER CHEMICAL SOC, 2009年02月, MACROMOLECULES, 42 (4), 1175 - 1179, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Yun Hu, Harumi Sato, Jianming Zhang, Isao Noda, Yukihiro Ozaki

    The miscibility, crystallization and subsequent melting behavior in binary biodegradable polymer blends of poly(L-lactic acid) (PLLA) and low molecular weight poly(3-hydroxybutyrate) (PHB) have been investigated by differential scanning calorimetry (DSC), Fourier-transform infrared (FTIR) spectroscopy, and wide-angle X-ray diffraction (WAXD). DSC analysis results indicted that PLLA showed no miscibility with high molecular weight PHB (M-w = 650,000 g mol(-1)) in the 80/20, 60/40, 40/60, 20/80 composition range of the PHB/PLLA blends. On the other hand, it showed some limited miscibility with low molecular weight PHB (M-w = 5000 g mol(-1)) when the PHB content was below 25%, as evidenced by small changes in the glass transition temperature of PLLA. The partial miscibility was further supported by changes of cold-crystallization behavior of PLLA in the blends. During the nonisothermal crystallization, it was found that the addition of a small amount of PHB up to 30% made the cold-crystallization of PLLA occur in the lower temperature. Meanwhile, the crystallization of PHB and PLLA was observed in the heating process by monitoring characteristic IR bands of each component for the low molecular weight PHB/PLLA 20/80 and 30/70 blends. The temperature-dependent IR and WAXD results also revealed that for PLLA component crystallization, the disorder (alpha') phase of PLLA was produced, and that the a' phase changed to the order (a) phase just prior to the melting point. (C) 2008 Elsevier Ltd. All rights reserved.

    ELSEVIER SCI LTD, 2008年09月, POLYMER, 49 (19), 4204 - 4210, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Harumi Sato, Yuriko Ando, Jiri Dybal, Tadahisa Iwata, Isao Noda, Yukihiro Ozaki

    We have investigated crystal structure and C-H⋯=C hydrogen bonding by using infrared (IR) spectroscopy and wide-angle X-ray diffraction (WAXD) for poly(3-hydroxyvalerate) (PHV) in comparison with those of poly(3- hydroxybutyrate) (PHB). We have explored the distances between the C=O group in one helix and the CH3 or CH2 groups in the other helix of PHV by using X-ray crystallographic data. It has turned out that the distance between the C=O group and the CH3 group of PHV is longer than that of the van der Waals separation (2.72 Å), while the distance between the C=O group and the two CH2 groups in the main and side chains of PHV is significantly shorter than that of the van der Waals separation. Therefore, it is very likely that PHV has C-H& mellipO=C hydrogen bondings between the C=O group and the one or two CH2 groups in the main or side chains. Of particular note is that CH2 antisymmetric and symmetric stretching bands of PHV show large blue shifts, which are characteristic of C-H⋯O hydrogen bondings. These strongly support the existence of CH 2⋯O=C hydrogen bondings in PHV. PHV shows three crystalline C=O stretching bands at 1740, 1725, and 1721 cm-1, suggesting that the C=O groups are in three different environments in the PHV crystal. The frequencies of the 1725 and 1721 cm-1 bands are very close to that of the crystalline C=O stretching band of PHB (1723 cm-1). We have assigned these two C=O stretching bands of PHV to the C=O group that has hydrogen bonds with both side chain and main chain CH2 groups and that has a hydrogen bond with one of the CH2 groups. Temperature-dependent increases in the a and b lattice parameters of PHV indicate mat the directions of C-H⋯O=C hydrogen bondings are almost in parallel to me (110) diffraction, which is the chain folding direction of PHV. PHB has a particular C-H⋯O=C hydrogen bonding between the C=O group and the CH3 group along the a axis ((110) to (11̄0) direction), which is the same direction as its chain folding direction. The difference in the chain folding direction between PHV and PHB may come from the difference in the inter- or intramolecular interactions in their crystal structures. © 2008 American Chemical Society.

    2008年06月24日, Macromolecules, 41 (12), 4305 - 4312, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Kyuyoung Heo, Jinhwan Yoon, Kyeong Sik Jin, Sangwoo Jin, Harumi Sato, Yukihiro Ozaki, Michael M. Satkowski, Isao Noda, Moonhor Ree

    The crystallization behavior of microbially synthesized poly(3-hydroxybutyrate) (PHB) and its copolymers [P(HB-co-HHx)] containing 2.5, 3.4, and 12 mol % 3-hydroxyhexanoate (HHx) comonomer and the melting of the resultant crystals were studied in detail using time-resolved small-angle X-ray scattering and differential scanning calorimetry. The polyesters were found to undergo primary crystallization as well as secondary crystallization. In-the primary crystallization, the thicknesses of the lamellar crystals were sensitive to the crystallization temperature, but no thickening was observed throughout the entire crystallization at a given temperature. The thickness of the lamellar crystals in the PHB homopolymer was always larger than that of the amorphous layers. In the copolymers, by contrast, the randomly distributed HHx comonomer units were found to be excluded from the lamellar crystals into the amorphous regions during the isothermal crystallization process. This interrupted the crystallization of the copolymer chains, resulting in the formation of lamellar crystals with thicknesses smaller than those of the amorphous layers. The lamellar crystals in the copolymers had lower electron densities compared to those formed in the PHB homopolymer. On the other hand, secondary crystallization favorably occurred during the later stage of isothermal crystallization in competition with the continuous primary crystallization, forming secondary crystals in amorphous regions, in particular in the amorphous layers between the primarily formed lamellar crystal stacks. Compared to the primarily formed lamellar crystals, the secondary crystals had short-range-ordered structures of smaller size, a broader size distribution, and a lower electron density.

    AMER CHEMICAL SOC, 2008年04月, JOURNAL OF PHYSICAL CHEMISTRY B, 112 (15), 4571 - 4582, 英語

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    研究論文(学術雑誌)

  • Katsuhito Mori, Shota Mukoyama, Ying Zhang, Harumi Sato, Yukihiro Ozaki, Hikaru Terauchi, Isao Noda, Isao Takahashi

    We investigate surface morphology and crystalline structure of biodegradable polymers poly(3-hydroxybutyrate) (PHB) and its random copolymer poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (P(HB-co-HHx), HHx = 12 mot %) using surface-sensitive techniques. Surface region typically to a depth of about 10 nm of polymer films which have thickness ranging from 20 to 120 nm is observed by grazing incidence X-ray diffraction (GIXD), X-ray reflectivity (XR), and atomic force microscopy (AFM). Both PHB and P(HB-co-HHx) show that crystallographic b-axis of crystallites in the surface region is aligned in the direction normal to the surface. It indicates that intermolecular interaction along a-axis is still dominant in the surface region, which would also determine the fastest growth direction of crystalline lamellae. A lattice relaxation peculiar to P(HB-co-HHx) surfaces is recognized in the b-axis length. As temperature is raised, crystalline lamellae characterized by densely packed molecular chains appear, implying a thermally activated transformation from metastable lamellae to stable ones. The metastable lamellae in which molecular chains fold loosely are mainly observed throughout rapid cooling, although the loosely and densely packed lamellae equally form in slow cooling. Furthermore, continuous lamellae melting at the surface is observed, all of which suggest an additional process for forming the metastable long-range order in the surface region. Crystallinity at polymer surface would also be responsible for the difference in surface morphology between PHB and P(HB-co-HHx) revealed by XR and AFM.

    AMER CHEMICAL SOC, 2008年03月, MACROMOLECULES, 41 (5), 1713 - 1719, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Kazuhiro Yamasaki, Shota Mukoyama, Sato Harumi, Ozaki Yukihiro, Terauchi Hikaru, Takahashi Isao

    INT UNION CRYSTALLOGRAPHY, 2008年, ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES, 64, C547 - C547, 英語

  • Christian Vogel, Shigeaki Morita, Harumi Sato, Isao Noda, Yukihiro Ozaki, Heinz W. Siesler

    The thermal degradation behavior of poly(3-hydroxybutyrate) (PHB) and poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (P(HB-co-HHx), HHx = 12 mol%) has been studied under different environmental conditions by thermogravimetric analysis (TGA) Fourier transform infrared (FT-IR) spectroscopy. It is reported that at higher temperature (> 400 degrees C) carbon dioxide and propene are formed from the decomposition product crotonic acid in a nitrogen atmosphere, whereas in an oxygen atmosphere propene oxidizes in a further step to carbon dioxide, carbon monoxide and hydrogen. It was also found that PHB and P(HB-co-HHx) have a similar thermal degradation mechanism. The analysis of the FT-IR-spectroscopic data was performed with 2D and perturbation-correlation moving-window 2D (PCMW2D) correlation spectroscopy.

    SOC APPLIED SPECTROSCOPY, 2007年07月, APPLIED SPECTROSCOPY, 61 (7), 755 - 764, 英語

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    研究論文(学術雑誌)

  • Harumi Sato, Noboru Higashi, Akifumi Ikehata, Noriko Koide, Yukihiro Ozaki

    The aim of the present study is to propose a totally new technique for the utilization of far-ultraviolet (UV) spectroscopy in polymer thin film analysis. Far-UV spectra in the 120-300 nm region have been measured in situ for six kinds of commercial polymer wrap films by use of a novel type of far-UV spectrometer that does not need vacuum evaporation. These films can be straightforwardly classified into three groups, polyethylene (PE) films, polyvinyl chloride (PVC) films, and polyvinylidene chloride (PVDC) films, by using the raw spectra. The differences in the wavelength of the absorption band due to the sigma-sigma* transition of the C-C bond have been used for the classification of the six kinds of films. Using this method, it was easy to distinguish the three kinds of PE films and to separate the two kinds of PVDC films. Compared with other spectroscopic methods, the advantages of this technique include nondestructive analysis, easy spectral measurement, high sensitivity, and simple spectral analysis. The present study has demonstrated that far-UV spectroscopy is a very promising technique for polymer film analysis.

    SOC APPLIED SPECTROSCOPY, 2007年07月, APPLIED SPECTROSCOPY, 61 (7), 780 - 783, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Yun Hu, Jianming Zhang, Harumi Sato, Isao Noda, Yukihiro Ozaki

    The multiple melting behavior of poly (3-hydroxybutyrate-co-3-hydroxyhexanoate) (P(HB-co-HHx)) (HHx = 12 mol%) isothermally crystallized from the melt state has been characterized by differential scanning calorimetry (DSC) and Fourier transform infrared (FTIR) spectroscopy. The influence of different experimental variables (such as crystallization temperature, time, and heating rate) on the multiple melting behavior of P(HB-co-HHx) was investigated by using DSC. Moreover, it has been further examined by monitoring intensity changes of the characteristic IR bands during the subsequent heating process. For the isothermally crystallized P(HB-co-HHx) samples, triple melting peaks were observed upon heating. The weak lowest-temperature DSC endotherm I always appears at the position just above the crystallization temperature, and shifts to a higher temperature linearly with the logarithm of the crystallization time. The combination of DSC and IR results suggested that the occurrence of peak I was a result of the melting of crystals formed upon long-time annealing. As for the other two main melting endothermic peaks, endotherm 11 corresponds to the melting of crystals formed during the primary crystallization, and endotherm III is ascribed to the melting peak of the crystals formed by recrystallization during the heating process. (c) 2007 Published by Elsevier Ltd.

    ELSEVIER SCI LTD, 2007年07月, POLYMER, 48 (16), 4777 - 4785, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Tsuyoshi Furukawa, Harumi Sato, Hideyuki Shinzawa, Isao Noda, Shukichi Ochiai

    The homogeneity of blends of poly((R)-3-hydroxybutyrate) (PHB) and poly(L-lactic acid) (PLLA) was evaluated by the near infrared chemical imaging (NIRCI) technique. NIRCI can nondestructively investigate a sample over a wide field of view within a few minutes to acquire a large number of spatially resolved NIR spectral data. NIRCI may be combined with multivariate analysis not only for qualitative analysis but also for statistically based quantitative analysis. The score images derived from the partial least squares regression (PLSR) analysis directly show that PHB/PLLA blends are highly homogeneous. The standard deviations (STD) of the histograms, indicating the distribution of the score values, show small values for the blends. These results qualitatively and quantitatively show the high level of homogeneity of PHB/PLLA blends. The predictions of the spatially averaged concentrations of the blend components obtained from PLSR results show values similar to the actual contents for the blends. The small errors of the predictions are also explained by STD values.

    JAPAN SOC ANALYTICAL CHEMISTRY, 2007年07月, ANALYTICAL SCIENCES, 23 (7), 871 - 876, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Young Mee Jung, Harumi Sato, Isao Noda

    Principal component analysis-based two-dimensional (PCA2D) correlation spectroscopy, combined with the eigenvalue manipulating transformation (EMT) of a spectral data set, was applied to the temperature-dependent IR spectra of poly(hydroxybutylate) (PHB). In asynchronous PCA2D correlation spectrum, we clearly captured the existence of two components in the crystalline band of the C=O stretching mode, well-ordered primary crystals observed at lower wavenumber and less ordered secondary crystals observed at higher wavenumber, which is not readily detectable in the ID spectra. By lowering the power of a set of eigenvalues associated with the original data, subtle differences in the thermal responses of PHB, which are difficult to observe even by conventional 2D correlation analysis, are revealed. When the contributions from minor factors are enhanced by eigenvalue manipulating transformation, intensities of bands assignable to the amorphous component of PHB are accentuated more in the C-O-C stretching region, while the intensities of bands assignable to the crystalline component become most prominent in the CH stretching region. However, the 2D correlation between CH and C=O stretching region reveals that the spectral intensity change of the CH3 stretching bands at 2975 cm(-1) contains a component due to the amorphous contribution.

    JAPAN SOC ANALYTICAL CHEMISTRY, 2007年07月, ANALYTICAL SCIENCES, 23 (7), 881 - 889, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Kyuyoung Heo, Jinhwan Yoon, Kyeong Sik Jin, Sangwoo Jin, Gahee Kim, Harumi Sato, Yukihiro Ozaki, Michael M. Satkowski, Isao Noda, Moonhor Ree

    The crystallization behavior of microbially synthesized poly(3-hydroxybutyrate) was studied in detail using time-resolved small-angle X-ray scattering. This polyester was found to undergo primary crystallization as well as secondary crystallization. In the primary crystallization, the thicknesses of the lamellar crystals were sensitive to the crystallization temperature, but no thickening was observed throughout the entire crystallization at a given temperature. The thickness of the lamellar crystals in the polyester was always larger than that of the amorphous layers. Secondary crystallization favorably occurred during the later stage of isothermal crystallization in competition with the continuous primary crystallization, forming secondary crystals in amorphous regions, in particular in the amorphous layers between the primarily formed lamellar crystal stacks. Compared to the primarily formed lamellar crystals, the secondary crystals had short-range-ordered structures of smaller size, a broader size distribution, and a lower electron density.

    BLACKWELL PUBLISHING, 2007年04月, JOURNAL OF APPLIED CRYSTALLOGRAPHY, 40, S594 - S598, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Rumi Murakami, Harumi Sato, Jiri Dybal, Tadahisa Iwata, Yukihiro Ozaki

    Infrared (IR) and Raman spectra were measured for four kinds of ultra-high-molecular-weight poly [(R)-3-hydroxybutyrate] (UHMW-PHB) films: a solvent-cast film, a cold-drawn film, a two-step-drawn film, and a hot-drawn film. Quantum chemical calculations were made for octamer models of UHMW-PHB with a helix conformation (alpha-form) and a planar zigzag conformation (beta-form). Comparison of the results between the Raman spectra of four kinds of films and the quantum chemical calculations of octamer models revealed that only two-step-drawn film yields additional bands at 1735, 966, 935, 908, and 858 cm(-1) assignable to the beta-structure, suggesting that it contains the beta-form as well as the alpha-form. Detailed comparison of the frequencies and intensities of Raman bands between the observed and calculated values for the beta-form indicates that the amount of beta-form is relatively small and that the beta-structure has a less ordered structure. The infrared and Raman spectra of two-step-drawn film also indicate that it has more amorphous parts than other films. When the two-step-drawn film was further heated up to 130 degrees C and then cooled down to room temperature, the above additional bands due to the beta-form disappeared in the Raman spectra, suggesting that the beta-form is less stable than alpha-form. (c) 2007 Elsevier Ltd. All rights reserved.

    ELSEVIER SCI LTD, 2007年04月, Polymer, 48 (9), 2672 - 2680, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Shuangyan Huan, Weiqi Lin, Harumi Sato, Haifeng Yang, Jianhui Jiang, Yukihiro Ozaki, Hailong Wu, Guoli Shen, Ruqin Yu

    Morphology, chemical distribution and domain size in poly(ethylene terephthalate)/high-density poly(ethylene) (PET/HDPE) polymer blends of various ratios prepared with and without maleic anhydride have been analyzed with confocal Raman mapping and SEM. The ratioimage method introduced here allows us to obtain enhanced chemical images with higher contrast and reliability. Compatibility numbers (N-c) are calculated to evaluate the compatibility of the blends. The incompatible polymer blends show heterogeneous distribution with phase separation behavior, while the semicompatible blends prepared with maleic anhydride show much smaller subphase distributions with less distinct interphases. After the blending modification by maleic anhydride of only 0.5%, the viscosity status and dispersibility between PET and HDPE could be substantially improved, and the interactions that exist between the two phases have also been proved by ATR-FT-IR results. High-spatial-resolution confocal Raman mapping coupled with the ratioimage method provides a very attractive way to characterize the compatibility and phase behavior of the polymer blend through different blending methodologies. Copyright (C) 2006 John Wiley & Sons, Ltd.

    JOHN WILEY & SONS LTD, 2007年03月, JOURNAL OF RAMAN SPECTROSCOPY, 38 (3), 260 - 270, 英語

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    研究論文(学術雑誌)

  • Tsuyoshi Furukawa, Harumi Sato, Rumi Murakami, Jianming Zhang, Isao Noda, Shukichi Ochiai, Yukihiro Ozaki

    Comparison of miscibility and structure of poly((R)-3-hydroxybutyrate-co-(R)-3-hydroxyhexanoate) (P(HB-co-HHx)) (M-w = 638,000 g mol(-1)) and poly(L-lactic acid) (PLLA) (M,, = 150,000 g mol(-1)) with those of poly((R)-3-hydroxybutyrate) (PHB) (M-w = 600,000 g mol(-1)), and PLLA having the blending ratios was investigated by wide angle X-ray diffraction (WAXD), differential scanning calorimetry (DSC), and infrared (IR) microspectroscopy techniques. WAXD reflection patterns show that the lattice parameters of a and b axes for PHB and P(HB-co-HHx) are unchanged in their blends with PLLA regardless of blending ratio. These WAXD results suggest that their crystalline structures are independent of the second component. The glass transition temperature (T-g) of blend components did not significantly change. The crystallization temperature (T-g) of PLLA reveal that both PHB/PLLA and P(HB-co-HHx)/PLLA blends form mixed semicrystalline systems. The T-g of PLLA in the PHB/PLLA blends and that in the P(HB-co-HHx)/PLLA blends shift to opposite directions indicating that both blends are immiscible but exhibit different levels of compatibilities. Micro IR spectra show that crystalline bands due to PHB appear even for the 20/80 blend but those due to PLLA are hardly observed for all the PHB/PLLA blends investigated. On the other hand, the crystalline bands of PLLA are observed in the micro IR spectra of some spots in the 20/80 P(HB-co-HHx)/PLLA blend. Micro IR spectra also show significant differences in the compatibility and crystalline structures between the P(HB-co-HHx)/PLLA and PHB/PLLA blends. (c) 2007 Elsevier Ltd. All rights reserved.

    ELSEVIER SCI LTD, 2007年03月, POLYMER, 48 (6), 1749 - 1755, 英語

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    研究論文(学術雑誌)

  • Jianming Zhang, Harumi Sato, Tsuyoshi Furukawa, Hideto Tsuji, Isao Noda, Yukihiro Ozaki

    By adjusting the molecular weight of the poly(L-lactic acid) (PLLA) component in poly(3-hydroxybutyrate) (PHB)/PLLA blends, we investigated the crystallization behaviors of the two components in their immiscible and miscible 50:50 blends by real time infrared (IR) spectroscopy. In the immiscible PHB/PLLA blend, the stepwise crystallization of PHB and PLLA was realized at different crystallization temperatures. PLLA crystallizes first at a higher temperature (120 degrees C). Its crystallization mechanism from the immiscible PHB/PLLA melt is not affected by the presence of the PHB component, while its crystallization rate is substantially depressed. Subsequently, in the presence of crystallized PLLA, the isothermal melt-crystallization of PHB takes place at a lower temperature (90 degrees C). It is interesting to find that there are two growth stages for PHB. At the early stage of the growth period, the Avrami exponent is 5.0, which is unusually high, while in the late stage, it is 2.5, which is very close to the reported value (n approximate to 2.5) for the neat PHB system. In contrast to the stepwise crystallization of PHB and PLLA in the immiscible blends, the almost simultaneous crystallization of PHB and PLLA in the miscible 50:50 blend was observed at the same crystallization temperature (110 degrees C). Detailed dynamic analysis by IR spectroscopy has disclosed that, even in such apparently simultaneous crystallization, the crystallization of PLLA actually occurs faster than that of PHB. It has been found that, both in the immiscible and miscible blends, the crystallization dynamics of PHB are heavily affected by the presence of crystallized PLLA.

    AMER CHEMICAL SOC, 2006年12月, JOURNAL OF PHYSICAL CHEMISTRY B, 110 (48), 24463 - 24471, 英語

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    研究論文(学術雑誌)

  • Yun Hu, Boyan Li, Harumi Sato, Isao Noda, Yukihiro Ozaki

    A method based on noise perturbation in functional principal component analysis (NPFPCA) is for the first time introduced to overcome the noise interference problem in two-dimensional correlation spectroscopy (2D-COS). By the systematic addition of synthetic noise to the dynamic multivariate spectral data, the functional principal component analysis (FPCA) described in this report is able to accurately determine which eigenvectors are representing significant signals instead of noise in the original data. This feature is especially useful for the data reconstruction and noise filtering. Reconstructed data resulted from the smooth eigenvectors can produce much more reliable 2D correlation spectra by removing the correlation artifacts from noise, which in turn enable more accurate interpretation of the spectral variations. The usefulness of this method is demonstrated with a theoretical framework and applications to the 2D correlation analyses of both simulated data and temperature-dependent reflection-absorption infrared spectra of a poly(3-hydroxybutyrate) (PHB) thin film.

    AMER CHEMICAL SOC, 2006年10月, JOURNAL OF PHYSICAL CHEMISTRY A, 110 (39), 11279 - 11290, 英語

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    研究論文(学術雑誌)

  • Yongxin Duan, Jing Liu, Harumi Sato, Jianming Zhang, Hideto Tsuji, Yukihiro Ozaki, Shouke Yan

    The molecular weight dependence of poly(L-lactide)/poly(D-lactide) (PLLA/PDLA) stereocomplex behavior at the air-water interface was studied by surface pressure-area (pi-A) isotherms and atomic force microscopy (AFM). It was found that the compression-induced sterecomplexation of a PDLA/PLLA equimolar blend with high molecular weight (M-w = 1 x 10(6) and 9.8 x 10(5), respectively) could occur at the air-water interface. This result is in marked contrast with the stereocomplexation of PDLA/PLLA blends in the bulk from the melt or in solutions, where the homocrystallites of either PLLA or PDLA rather than stereocomplex crystallites will be formed preferentially when the molecular weights of both polymers are higher than 1 x 10(5). Unexpectedly, the Langmuir-Blodgett behavior of the PDLA/PLLA blend with lower molecular weight (M-w = 4 x 10(3) and 3.2 x 10(3), respectively), which should be favored in the stereocomplex, was distinct from that of other higher molecular weight blends. AFM images clearly disclosed for the first time the morphological changes of the equimolar blends of PLLA and PDLA at the air-water interface induced by increasing the surface pressure of the monolayer. Of particular note, the bilayer mechanism for the plateau in the isotherm was directly verified by the AFM height images.

    AMER CHEMICAL SOC, 2006年10月, BIOMACROMOLECULES, 7 (10), 2728 - 2735, 英語

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    研究論文(学術雑誌)

  • X-ray diffraction and infrared spectroscopy studies on crystal and lamellar structure and CHO hydrogen bonding of biodegradable poly(hydroxyalkanoate)

    Harumi Sato, Rumi Murakami, Jianming Zhang, Yukihiro Ozaki, Katsuhito Mori, Isao Takahashi, Hikaru Terauchi, Isao Noda

    Temperature-dependent, wide-angle, x-ray diffraction (WARD) patterns and infrared (IR) spectra were measured for biodegradable poly(3-hydroxybutyrate) (PHB) and its copolymers, poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) P(HB-co-HHx) (HHx=2.5, 3.4, 10.5, and 12 mol%), in order to explore their crystal and lamellar structure and their pattern of C-H(...)O=C hydrogen bonding. The WARD patterns showed that the P(HB-co-HHx) copolymers have the same orthorhombic system as PHB. It was found from the temperature-dependent WARD measurements of PHB and P(HB-co-HHx) that the a lattice parameter is more enlarged than the b lattice parameter during heating and that only the a lattice parameter shows reversibility during both heating and cooling processes. These observations suggest that an interaction occurs along the a axis in PHB and P(HB-co-HHx). This interaction seems to be due to an intermolecular C-H(...)O=C hydrogen bonding between the C=O group in one helical structure and the CH(3) group in the other helical structure. The x-ray crystallographic data of PHB showed that the distance between the O atom of the C=O group in one helical structure and the H atom of one of the three C-H bonds of the CH(3) group in the other helix structure is 2.63 angstrom, which is significantly shorter than the sum of the van der Waals separation (2.72 angstrom). This result and the appearance of the CH(3) asymmetric stretching band at 3009 cm(-1) suggest that there is a C-H(...)O=C hydrogen bond between the C=O group and the CH(3) group in PHB and P(HB-co-HHx). The temperature-dependent WARD and IR measurements revealed that the crystallinity of P(HB-co-HHx) (HHx=10.5 and 12 mol%) decreases gradually from a fairly low temperature, while that of PHB and P(HB-co-HHx) (HHx=2.5 and 3.5 mol%) remains almost unchanged until just below their melting temperatures. It was also shown from our studies that the weakening of the C-H(...)O=C interaction starts from just above room temperature and proceeds gradually increasing temperature. It seems that the C-H(...)O=C hydrogen bonding stabilizes the chain holding in the lamellar structure and affects the thermal behaviour of PHB and its copolymers.

    SPRINGER, 2006年08月, MACROMOLECULAR RESEARCH, 14 (4), 408 - 415, 英語

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    研究論文(学術雑誌)

  • Y Hu, JM Zhang, H Sato, Y Futami, Noda, I, Y Ozaki

    We have investigated the C-H center dot center dot center dot O=C hydrogen bonding and isothermal crystallization kinetics of poly(3-hydroxybutyrate) (PHB) at 125 degrees C by using near-infrared (NIR) spectroscopy, which allows us to investigate thick films. The NIR spectrum of a PHB film changes remarkably with the evolution of isothermal crystallization process. Accordingly, NIR bands due to the amorphous and crystalline states have been assigned. Particular attention has been paid to a NIR band at 5973 cm(-1) due to the first overtone of the C-H stretching mode and an IR band at 3435 cm(-1) due to the first overtone of the C=O stretching mode of the C-H center dot center dot center dot O=C hydrogen bonding combining two parallel helical structures of PHB. The anharmonicity of C-H (5973 cm(-1)) and C=O (3435 cm(-1)) bands arising from the crystalline parts and that of the amorphous C-H (5954 cm(-1)) and C=O (3457 cm(-1)) bands was investigated by using both IR and NIR data. The anharmonicity of crystalline C- H and C=O bands is significantly different from that of the amorphous C- H and C=O bands, supporting the idea that both CH and C=O bonds in the crystalline state are involved in the C-H center dot center dot center dot O=C hydrogen bonding. Principal component analysis (PCA) was used to analyze the real-time NIR difference spectra measured during the isothermal crystallization process. The result suggests that the crystallization process may be not a simple transition of binary mixture of the amorphous and ordered crystalline states. Moreover, the crystallization kinetics parameters of PHB have been obtained by combining PCA and Avrami equation based on the spectral regions instead of the intensity changes of certain bands.

    AMER CHEMICAL SOC, 2006年05月, MACROMOLECULES, 39 (11), 3841 - 3847, 英語

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    研究論文(学術雑誌)

  • Tsuyoshi Furukawa, Harumi Sato, Rumi Murakami, Jianming Zhang, Isao Noda, Shukichi Ochiai, Yukihiro Ozaki

    The structure, dispersibility, and crystallinity of poly(3-hydroxybutyrate) (PHB) and poly(L-lactic acid) (PLLA) blends are investigated by using Raman microspectroscopy. Four kinds of PHB/PLLA blends with a PLLA content of 20, 40, 60, and 80 wt% were prepared from chloroform solutions. Differences in the Raman microspectroscopic spectra between the spherulitic and nonspherulitic parts in the blends mainly lie in the C=O stretching band and C-O-C and C-C skeletal stretching bands of PHB and PLLA. In addition to such bands, the Raman spectra of spherulitic structure in the blends show a band due to the CH(3) asymmetric stretching mode at an unusually high frequency (3009 cm(-1)), suggesting the existence of a C-H(...)O=C hydrogen bond of PHB in the spherulite. The existence of C-H(...)O=C hydrogen bond is one of the unambiguous evidence for the crystallization of PHB component in the blends. Therefore, it is possible to distinguish Raman bands due to each component in the spectra of blends. Raman spectra of the spherulitic structure in the blends are similar to a Raman spectrum of pure crystalline PHB, while those of the nonspherulitic parts in the blends have each component peak of PHB and PLLA. The present study reveals that the PHB component is crystallized in the blends irrespective of the blend ratio, and that both components are mixed in the nonspherulite parts. The crystalline structure of PHB and the nonspherulitic parts of PLLA in the blends are characterized, respectively, by the unique band of C-H... O=C hydrogen bond at 3009 cm(-1) and CCO deformation bands near 400 cm(-1). (c) 2006 Elsevier Ltd. All rights reserved.

    ELSEVIER SCI LTD, 2006年04月, POLYMER, 47 (9), 3132 - 3140, 英語

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    研究論文(学術雑誌)

  • H Sato, K Mori, R Murakami, Y Ando, Takahashi, I, JM Zhang, H Terauchi, F Hirose, K Senda, K Tashiro, Noda, I, Y Ozaki

    Temperature-dependent X-ray diffraction and infrared (IR) spectra were measured for poly(3-hydroxybutyrate) (PHB) and poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) P(HB-co-HHx) (HHx = 2.5, 3.4, 10.5, and 12 mol %) to explore their crystal and lamella Structure and the C-H center dot center dot center dot O=C hydrogen bonding in them. The X-ray diffraction and IR measurements of PHB and P(HB-co-HHx) revealed that the smaller the a lattice parameter, the higher the frequency (similar to 3008 cm(-1)) of the C-H stretching hand of the C-H center dot center dot center dot O=C hydrogen bonding along the a axis between the CH3 group of one helix and the C=O group of another helix. Therefore, it seems that the C-H center dot center dot center dot O=C hydrogen bonding becomes strong with the decrease in the a lattice parameter. To investigate the relation between the C-H center dot center dot center dot O=C hydrogen bonding and the lamella structure, we estimated file number of C-H center dot center dot center dot O=C hydrogen bonding along the c axis (the direction of the lamella thickness) based oil the reported lamella thickness. It is about 8 or 9 for PHB and about 3 for P(HB-co-HHx) (HHx = 10.5 and 12 mol %). It is very likely that the C-H center dot center dot center dot O=C hydrogen bondings break much more easily in P(HB-co-HHx) than in PHB because of the bulkiness of large amounts of amorphous parts. However, the polymer chains still keep the lamella Structure even in the copolymers with the HHx content of more than several percent. This is the reason why the P(HB-co-HHx) copolymers show high crystallinity and essentially have the same lattice spacing as the PHB homopolymer even if the HHx content is more than 10%. We have Concluded that the C-H center dot center dot center dot O=C hydrogen bonding stabilizes the chain folding in the lamella structure of PHB and P(HB-co-HHx) and the high crystallinity of PHB and P(HB-co-HHx) partly comes from the C-H center dot center dot center dot O=C hydrogen bonding.

    AMER CHEMICAL SOC, 2006年02月, MACROMOLECULES, 39 (4), 1525 - 1531, 英語

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    研究論文(学術雑誌)

  • Tsuyoshi Furukawa, Harumi Sato, Yasuo Kita, Kimihiro Matsukawa, Hiroshi Yamaguchi, Shukichi Ochiai, Heinz. W. Siesler, Yukihiro Ozaki

    The present study is aimed at investigating the molecular structure, crystallinity, and morphology of polyethylene (PE) and polypropylene (PP) blends by using Raman mapping, scanning electron microscopy (SEM), wide-angle X-ray diffraction (WAXD), and differential scanning calorimetry (DSC). In this study, three kinds of PEs, high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), and metallocene polyethylene (MEPE) were used. MEPE is one of the LLDPEs but its density is very low and its melt flow index (MFI) is very high. Blends of each PE and PP with a PP content ranging from 20 to 80 wt % with an increment of 20 wt % were prepared. Raman mapping images and SEM images show that the 80/20 blends of HDPE/PP and LLDPE/PP have similar dispersibility behavior and that only the 80/20 blend of MEPE/PP shows a different behavior in this respect. For the 20/80 blends, the differences are not so large. For the Raman mapping, the intensity ratio of the two bands at 1128 and 974 cm(-1) was used. The former is due to a symmetric C-C stretching mode of all-trans -(CH2)(n)- groups of PE while the latter is assigned to a CH3 rocking mode of PP. MEPE/PP blends yield quite different X-ray diffraction patterns compared to HDPE/PP and LLDPE/PP blends; the MEPE/PP blends show that with increasing MEPE content the crystalline size of PP become smaller. DSC curves of MEPE/PP show that the peak area changes linearly with the blending ratio and that the crystallization temperature does not change for any blend. These results mean that the density and MFI of PE influences the blend properties.

    SOC POLYMER SCIENCE JAPAN, 2006年, POLYMER JOURNAL, 38 (11), 1127 - 1136, 英語

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    研究論文(学術雑誌)

  • H Huang, Y Hu, JM Zhang, H Sato, HT Zhang, Noda, I, Y Ozaki

    Miscibility and hydrogen-bonding interactions, as well as the morphological properties, of biodegradable polymer blends of poly(3-hydroxybutyrate) (PHB) and a 80% hydrolyzed poly(vinyl alcohol) (PVA80) were studied using Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC). It was found that PHB is miscible with PVA80 in the amorphous phase over the whole composition range. PVA80 or PHB assumes the amorphous state when its content in the blend is lower than 30 or 20 wt %, respectively. Due to the heavy overlapping of C=O stretching bands from both PVA80 and PHB and the nonmeasurable peak shift in the OH stretching band region, hydrogen-bonding interactions between the OH group of PVA80 and the C=O group of PHB were not detectable at room temperature, but were observed at a higher temperature of 180 degrees C. This is because hydrogen-bonding interactions are promoted above the melting points of these two crystalline polymers, by increasing the mixing entropy and reducing the Delta chi effect. Blending PHB with PVA80 does not have a significant effect on the OH groups of PVA80 that are hydrogen bonded with each other. Instead, the C=O groups of PHB dispossess some of the OH groups that are hydrogen bonded to the C=O groups of PVA80, which gives rise to the miscibility between PVA80 and PHB in the amorphous phase.

    AMER CHEMICAL SOC, 2005年10月, JOURNAL OF PHYSICAL CHEMISTRY B, 109 (41), 19175 - 19183, 英語

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    研究論文(学術雑誌)

  • JM Zhang, YX Duan, H Sato, H Tsuji, Noda, I, S Yan, Y Ozaki

    Recently, we reported the isothermal crystallization behaviors of poly(L-lactic acid) (PLLA) from the melt and glassy states, respectively [J. Phys. Chem. B 2004, 108, 11514; Macromolecules 2004, 37, 6433]. Surprisingly, the quite different infrared (IR) spectral evolutions occur in the two crystallization processes at different temperatures in which the same crystal modification is expected to be formed. To clarify this unusual phenomenon, the crystal modifications and thermal behavior of PLLA samples prepared under different crystallization temperatures are investigated in detail by TEM, WAXD, and FTIR techniques. On the basis of the WAXD and IR data, a new crystal modification named the alpha form is proposed for the crystal structure of PLLA samples annealed at temperature below 120 degrees C. Such crystal modification with loose 10(3) helical chain packing is less thermally stable than the standard a form of PLLA. This assignment can explain all the experiment observations well. Other possible mechanisms for the IR spectral difference of bulk PLLA samples annealed at different temperatures are also discussed.

    AMER CHEMICAL SOC, 2005年09月, MACROMOLECULES, 38 (19), 8012 - 8021, 英語

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    研究論文(学術雑誌)

  • T Furukawa, H Sato, R Murakami, JM Zhang, YX Duan, Noda, I, S Ochiai, Y Ozaki

    The present study is aimed at investigating structure, dispersibility, and crystallinity of poly(3-hydroxybutyrate) (PHB) and poly(L-lactic acid) (PLLA) blends by using FT-IR microspectroscopy and differential scanning calorimetry (DSC). Four kinds of PHB/PLLA blends with a PLLA content of 20, 40, 60, and 80 wt % were prepared from chloroform solutions. Micro-IR spectra obtained at different positions of a PHB film are all very similar to each other, suggesting that there is no discernible segregated amorphous and crystalline parts on the PHB film at the resolution scale of micro-IR spectroscopy. On the other hand, the micro-IR spectra of two different positions of a PLLA film, where spherulite structures are observed and they are not observed, are significantly different from each other. PHB and PLLA have characteristic IR marker bands for their crystalline and amorphous components. Therefore, it is possible to explore the structure of each component in the PHB/PLLA blends by using micro-IR spectroscopy. The IR spectra of a position of blends except for the 20/80 blend are similar to that of pure PHB. On the other hand, the IR spectra of another position of the blend consist of the overlap of those of pure PHB and PLLA. For the 20/80 blend, it is difficult to find a position whose spectrum is similar to that of pure PHB. However, a crystalline peak due to the C=O stretching band is observed at 1718 cm(-1). This means that PHB crystallizes as very small spherulites or immature spherulites under such blend ratio. DSC curves of the blend show that the heat of crystallization of PHB varies with the blending ratio of PHB and PLLA. The recrystallization peak is detected for PLLA and the 20/80 blend respectively at 106.5 and 88.2 degrees C. The lowering of recrystallization temperature for the 20/80 blend compared with that of pure PLLA suggests that PHB forms small finely dispersed crystals that may act as nucleation sites of PLLA. The results for the PHB/PLLA blends obtained from IR microspectroscopy indicate that PHB crystallizes in any blends. However, crystalline structures of PHB in the 80/20, 60/40, and 40/60 blends are different from those of the 20/80 blend.

    AMER CHEMICAL SOC, 2005年07月, MACROMOLECULES, 38 (15), 6445 - 6454, 英語

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    研究論文(学術雑誌)

  • H Sato, J Dybal, R Murakami, Noda, I, Y Ozaki

    This review paper reports infrared (IR) and Raman spectroscopy and quantum chemistry calculation studies of C-H center dot center dot center dot O hydrogen bondings and thermal behavior of biodegradable polyhydroxyalkanoates. IR and Raman spectra were measured for poly(3-hydroxybutyrate) (PHB) and a new type of bacterial copolyester, poly(3-hydroxybutyrate-co-3-hydroxyhexanoate), P(HB-co-HHx) (HHx = 12 mol%) over a temperature range of 20 T to higher temperatures (PHB, 200 degrees C; HHx = 12 mol%, 140 degrees C) to explore their structure and thermal behavior. One of bands due to the CH3 asymmetric stretching modes appears near 3010 cm(-1) in the IR and Raman spectra of PHB and P(HB-co-HHx) at 20 T. These frequencies of IR and Raman CH3 asymmetric stretching bands are much higher than usual. These anomalous frequencies of the CH3 asymmetric stretching bands together with the X-ray crystallographic structure of PHB have suggested that there is an inter- or intramolecular C-H... 0 hydrogen bond between the C=O group in one helical structure and the CH3 group in the other helical structure in PHB and P(HB-co-HHx). The quantum chemical calculation of model compounds of PHB also has suggested the existence of C-H... 0 hydrogen bonds in PHB and P(HB-co-HHx). It is very likely that a chain of C-H... 0 hydrogen bond pairs link two parallel helical structures in the crystalline parts. The temperature-dependent IR and Raman spectral variations have revealed that the crystallinity of P(HB-co-HHx) (HHx = 12 mol%) decreases gradually from a fairly low temperature (about 60 T), while the crystallinity of PHB remains almost unchanged until just below its melting temperature. It has also been found from the IR and Raman studies that for both PHB and P(HB-co-HHx) the weakening of the C-H... 0 hydrogen bonds starts from just above room temperature, but the deformation of helical structures occurs after the weakening of the C-H... 0 hydrogen bonds advances to some extent. (c) 2004 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2005年06月, JOURNAL OF MOLECULAR STRUCTURE, 744, 35 - 46, 英語

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    研究論文(学術雑誌)

  • JM Zhang, H Sato, Noda, I, Y Ozaki

    Time-dependent infrared (IR) spectral variations during isothermal melt-crystallization process of poly(3-hydroxybutyrate) (PHB) have been analyzed for different wavenumber regions (C-H, C=O, C-O-C, and C-C stretching vibration regions) by difference spectra, second derivatives, and two-dimensional (2D) correlation analysis, and the bands characteristic of crystalline and amorphous parts are identified in each region. By the 2D correlation analysis, it has been found that the intensity changes in the 1731 cm(-1) band, which may be due to the intermediate state, and in the 1722 cm(-1) band due to the crystal packing occur out of phase with each other, whereas those in the two amorphous C=O stretching bands (1747 and 1739 cm(-1)) ascribed to the different conformations of the main chain are synchronous, which represents a cooperative conformational rearrangement for the C=O groups in the amorphous state during the crystallization process. Meanwhile, a distinct delay between the intensity change rates of bands at 1184 and 825 cm(-1) indicates that the adjustment of C-O-C backbone occurs faster than that of C-C backbone in PHB. This result has also been confirmed by investigating the 2D correlation spectra of PHB in various spectral regions. On the basis of these observations, a physical picture on the molecular evolution of PHB during the melt-crystallization process has been derived.

    AMER CHEMICAL SOC, 2005年05月, MACROMOLECULES, 38 (10), 4274 - 4281, 英語

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    研究論文(学術雑誌)

  • JM Zhang, YX Duan, H Sato, DY Men, SK Yan, Noda, I, Y Ozaki

    The isothermal crystallization processes of isotactic polystyrene at 160 degrees C from different initial states (quenched glassy state and melt state), i.e., cold- and melt-crystallization processes, have been investigated by infrared (IR) and generalized two-dimensional (2D) IR correlation spectroscopy. It has been found that not only the crystallization kinetics and crystallinity but also the sequential changes of the amorphous and crystalline sensitive bands are quite different for the cold- and melt-crystallization processes. This leads to the conclusion that the physical origins for spinodal decomposition prior to polymer crystallization may be different for different crystallization processes.

    AMER CHEMICAL SOC, 2005年03月, JOURNAL OF PHYSICAL CHEMISTRY B, 109 (12), 5586 - 5591, 英語

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    研究論文(学術雑誌)

  • Jianming Zhang, Harumi Sato, Hideto Tsuji, Isao Noda, Yukihiro Ozaki

    The nature of the "peculiarly strong" interaction between the poly(L-lactide) (PLLA) and poly(D-lactide) (PDLA) chains was investigated by real time infrared spectroscopy during the isothermal melt crystallization process of the PLLA/PDLA stereocomplex. A very small low-frequency shift (about 1 cm -1) of v as(CH 3) and a larger low-frequency shift (about 5 cm -1) of v(C=O) were observed. The typical butterfly pattern in the two-dimensional (2D) asynchronous correlation spectrum and the second-derivative spectra reveal that there is a "peak shift" for v(C=O). The red shifts of the stretching vibration modes of the methyl and carbonyl groups suggest that the interaction between the PLLA/PDLA stereocomplex is ascribed to CH 3⋯O=C hydrogen bonding. Another interesting result is that the peak shift of the v(C=O) band already occurs in the induction period, which indicates that the CH 3⋯O=C interaction is the driving force for forming the racemic nucleation of the PLLA/PDLA stereocomplex. Moreover, the 2D correlation analysis indicates that the structural adjustment of the CH 3 group occurs prior to that of the C-O-C backbone during the stereocomplexation process of PLLA/PDLA. The CH 3⋯O=C interaction may be the reason for this sequence of structural changes. © 2005 American Chemical Society.

    AMER CHEMICAL SOC, 2005年03月, Macromolecules, 38 (5), 1822 - 1828, 英語

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    研究論文(学術雑誌)

  • A Padermshoke, Y Katsumoto, SA Harumi, S Ekgasit, Noda, I, Y Ozaki

    The melting behavior of a bacterially synthesized biodegradable polymer, poly(3-hydroxybutyrate) (PHB), was investigated by using generalized two-dimensional infrared (2D IR) correlation spectroscopy. Temperature-dependent spectral variations in the regions of the C-H stretching (3100-2850 cm(-1)), C=O stretching (1800-1680 cm(-1)), and C-O-C stretching (1320-1120 cm(-1)) bands were monitored during the melting process. The asynchronous 2D correlation spectrum for the C=O stretching band region resolved two crystalline bands at 1731 and 1723 cm(-1). The intense band at 1723 cm(-1) may be due to the highly ordered crystalline part of PHB, and the weak band at 1731 cm(-1) possibly arises from the crystalline part with a less ordered Structure. These crystalline bands at 1731 and 1723 cm(-1) share asynchronous cross peaks with a band at around 1740 cm(-1) assignable to the C=O band due to the amorphous component. This observation indicates that the decreases in the crystalline components do not proceed simultaneously with the increase in the amorphous component. In the 3020-2915 cm(-1) region where bands due to the asymmetric CH3 stretching and antisymmetric CH2 stretching modes are expected to appear, eight bands are identified at 3007, 2995, 2985, 2975, 2967, 2938, 2934, and 2929 cm(-1). The bands at 2985 and 2938 cm(-1) are ascribed to the amorphous part while the rest come from crystal field splitting which is a characteristic of polymers with a helical structure. (C) Elservier B.V. All rights reserverd.

    PERGAMON-ELSEVIER SCIENCE LTD, 2005年02月, SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 61 (4), 541 - 550, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Jianming Zhang, Harumi Sato, Hideto Tsuji, Isao Noda, Yukihiro Ozaki

    Time-dependent infrared (IR) spectra were measured for isothermal melt-crystallization process of poly(L-lactide) (PLLA), poly(L-lactide)/poly(D-lactide) (PLLA/PDLA) stereocomplex, and poly(3-hydroxybutyrate) (PHB), and the spectra were analyzed for the C-H and CO stretching band regions to explore the CH3⋯OC interactions in the above polymers. Both PLA and PHB are well known biodegradable polymers and have similar chemical structures, however, they showed quite different physical properties and spectral patterns in the C-H and CO stretching band regions. For example, PLLA, the PLLA/PDLA stereocomplex and PHB, respectively, give a CO stretching band due to the crystalline components at 1749, 1760, and 1723 cm-1. The CO stretching band of PLLA does not show a shift during the melt-crystallization process while that of the stereocomplex shows a 5 cm-1 low-frequency shift. PLLA and the PLLA/PDLA stereocomplex yield a CH3 asymmetric stretching band at very similar positions (2997 and 2994 cm-1, respectively), however, the former (the PLLA CH3 band) shows a 2 cm-1 higher frequency shift during the melt crystallization, while the latter (the PLLA/PDLA CH3 band) shows a 1 cm-1 lower frequency shift. PLLA and the stereocomplex give only one CH3 asymmetric stretching band, while PHB shows four bands. One of the CH3 asymmetric stretching bands of PHB appears at an unusually high wavenumber (3007 cm-1). These marked differences in the C-H and CO stretching band regions among PLLA, the PLLA/PDLA stereocomplex, and PHB suggest that they have different CH3⋯OC interactions. Based on the detailed analysis of the C-H and CO stretching band regions, we conclude that the PLLA/PDLA stereocomplex, and PHB have quite different types of C-H⋯O hydrogen bonds in the crystalline parts, and that PLLA has a only weak CH3⋯OC interaction. © 2004 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2005年02月, Journal of Molecular Structure, 735, 249 - 257, 英語

    [査読有り]

    研究論文(学術雑誌)

  • 佐藤 春実, 森田 成昭, 尾崎 幸洋

    日本接着学会, 2005年, 日本接着学会誌, 41 (5), 183 - 195, 日本語

  • S Sasic, H Sato, M Shimoyama, Y Ozaki

    Two-dimensional (2D) correlation coefficient analysis is employed to classify and characterize spectral variations among heavily overlapped near-infrared spectra of pellets and films of three kinds of polyethylene (PE), high-density (HD), low density (LD), and linear low-density ( LLD) polyethylene, and five kinds of ivory signature seals. The sample-sample ( SS) 2D correlation maps are used for classification while the wavenumber-wavenumber (WW) 2D correlation maps are used for determining spectral variation among the above materials. Both correlation maps are obtained by multiplying the original data with themselves. It is found that the NIR spectra of pellets and films of HD PE are clearly different from those of LD PE and LLD PE, while the NIR spectra of five kinds of ivory seals yield easily discernable squares in the SS correlation maps. The background variation is thought to be behind the differentiation of the PE samples because the WW correlation maps do not indicate appearance of new bands. The correlation results are compared with those of principal component analysis (PCA). This study is a novel application of 2D correlation coefficient analysis which reveals that a comprehensive description of demanding spectral systems is achievable by utterly simple mathematical means because 2D correlation maps are obtained via a single mathematical operation.

    ROYAL SOC CHEMISTRY, 2005年, ANALYST, 130 (5), 652 - 658, 英語

    [査読有り]

    研究論文(学術雑誌)

  • H Sato, A Padermshoke, M Nakamura, R Murakami, F Hirose, K Senda, H Terauchi, S Ekgasit, Noda, I, Y Ozaki

    The structure and thermal behavior of new types of bacterial copolyester, poly(3-hydroxybutyrate-co-3-hydroxyhexanoate); P(HB-co-HHx) (HHx=2.5, 3.4, and 12 mol %) have been explored by means of wide-angle x-ray diffraction (WAXD), differential scanning calorimetry (DSC), and infrared (IR) spectroscopy. The WAXD pattern of P(HB-co-HHx) (HHx=12 mol %) copolymer measured at room temperature has revealed that it has an orthorhombic system ( alpha = beta = gamma =90 degrees) with a=5.76A, b=13.2oA, c=5.96A (fiber repeat), which is identical to that of poly(3-hydroxybutyrate) (PHB). It has been found from the temperature-dependent variations of the WAXD pattern that only the a lattice parameter shows the thermal expansion, while the b lattice parameter changes little with temperature in the crystalline P(HB-co-HHx) (HHx=12 mol %). This observation suggests that there are inter and intramolecular interactions between C=O groups and alkyl groups along the a axis and that interactions are broken little by little with temperature. IR spectra were measured for the four kinds of polymers over a temperature range from 30 degrees C to high temperatures (200 degrees C; PHB, 180 degrees C; P(HB-co-HHx) (HHx=2.5 mol %), 180 degrees C; P(HB-co-HHx) (HHx=3.4 mol %), 150 degrees C; P(HB-co-HHx) (HHx=12 mol %)). Temperature-dependent IR spectral variations were analyzed for the CH, C=O, and C-O-C stretching band regions, and bands characteristic of crystalline and amorphous parts were identified in each region. It has been found from the IR study that the strength of interaction between the C=O group and the CH3 (or CH2) group is similar among the four polymers and that the population of C=O groups that are not involved in the interaction becomes higher with the increase in HHx. Both WAXD and IR studies have revealed that the crystallinity of P(HB-co-HHx) (HHx=12 mol %) decreases gradually starting from relatively low temperature (about 60 degrees C) while that of PHB remains high up to 170 degrees C.

    WILEY-V C H VERLAG GMBH, 2005年01月, MACROMOLECULAR SYMPOSIA, 220, 123 - 138, 英語

    [査読有り]

    研究論文(学術雑誌)

  • H Sato, M Isogai, S Sasao, K Matsukawa, Y Kita, H Yamaguchi, HW Siesler, Y Ozaki

    Molecular structure, crystallinity and morphology of uncompatibilized and compatibilized blends of high molecular weight polyethylene (HMWPE) and Nylon 12 were investigated by using Fourier-transform (FT) Raman spectroscopy, wide-angle x-ray diffraction (WAXD), and scanning electron microscopy (SEM). One of the important purposes of the present study is to compare the present results for HMWPE/Nylon 12 with the previously obtained results for high-density polyethylene (HDPE/Nylon 12). Uncompatibilized and compatibilized blends of HMWTE/Nylon 12 with a Nylon 12 content ranging from 10 to 90 wt% at increments of 10 wt% were prepared. The compatibilized polymer blends were prepared by adding a small amount of maleic anhydride (MAH), and SEM images show that the addition of the small amount of MAH (0.5 wt%) yields a marked improvement of dispersion of HMWPE and Nylon 12. To evaluate the crystallinity of HMWPE from Raman spectra, the relative intensities of bands at 1418 and 1129 cm(-1) to the intensity of a band at 1000 cm(-1) (I-1418/I-1000 and I-1129/I-1000) were estimated for all the uncompatibilized and compatibilized. blends of HMWPE/Nylon 12. From the comparison of the relative intensities (I-1418/I-1000 and I-1129/I-1000) between the uncompatibilized and compatibilized blends of HMWPE/Nylon 12 it was found that when the Nylon 12 content reaches 40 wt% the crystallinity of HMWPE in the compatibilized blends becomes higher than that of HMWPE in the uncompatibilized blends. The uncompatibilized and compatibilized blends of HMWPE/Nylon 12 (50/50) show quite different x-ray diffraction patterns; the compatibilized blend shows a significantly larger orientational effect in the x-ray pattern of HMWPE. It seems that the increase of interaction of MAH-HMWPE with the Nylon 12 matrix leads to the additional crystallinity.

    WILEY-V C H VERLAG GMBH, 2005年01月, MACROMOLECULAR SYMPOSIA, 220, 75 - 83, 英語

    [査読有り]

    研究論文(学術雑誌)

  • H Sato, R Murakami, JM Zhang, K Mori, Takahashi, I, H Terauchi, Noda, I, Y Ozaki

    infrared (IR) spectra and wide-angle X-ray diffraction (WAXD) patterns of poly(3-hydroxybutyrate) (PHB) and its copolyester, poly(3-hydroxybutyrate-co-3-hydroxyhexanoate), P(HB-co-HHx) (HHx=12 mol%) were measured over a temperature range of 20 degrees C to higher temperatures (PHB, 185 degrees C, HHx = 12 mol%, 140 degrees C) to explore their structure change and thermal behavior and molecular interaction. The WAXD measurements revealed that the a lattice parameter increases significantly with temperature, while the b lattice parameter varies a little in the crystalline PHB and P(HB-co-HHx). it seems that the intermolecular interaction between the C=O group of one helical structure and the CH(3) group of the other helical structure decreases along the a axis of crystalline PHB and P(HB-co-HHx) with temperature. The temperature-dependent IR spectral variations were analyzed for the CH stretching, C=O stretching, CH(3) deformation, and C-O-C stretching variation regions, and bands characteristic of crystalline and amorphous parts were identified in each region. it was found from the anomalous frequencies of the CH(3) asymmetric stretching and C=O stretching bands of PHB and P(HB-co-HHx) and the X-ray crystallographic structure of PHB that there is an intermolecular interaction (C-H(...)O=C hydrogen bond) between the C=O group and the CH(3) group combining two helical structures in PHB and P(HB-co-HHx). in this review paper we discuss the role of the C-H(...)O=C hydrogen bonding and the crystal and lamella structure of PHB and P(HB-co-HHx) (HHx=12 mol %) in comparison with the structure of Nylon.

    WILEY-V C H VERLAG GMBH, 2005年, MACROMOLECULAR SYMPOSIA, 230, 158 - 166, 英語

    [査読有り]

    研究論文(学術雑誌)

  • A Padermshoke, H Sato, Y Katsumoto, S Ekgasit, Noda, I, Y Ozaki

    The thermally induced crystalline/amorphous phase transition process of a newly developed biodegradable polymer. poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (P(HB-co-HHx)) (HHx = 12 mol%), was investigated by using generalized two-dimensional infrared (2D IR) correlation spectroscopy. Three spectral regions, the C-H stretching (3100-2800 cm(-1)), C=O stretching(1780-1680 cm(-1)), and C-O-C stretching (1330-1200 cm-1) band regions were analyzed in order to explore the phase transition behavior of the, copolymer. The asynchronous 2D spectrum generated from the temperature-induced variations in IR spectra in the C=O stretching band region clearly revealed the coexistence of two crystalline hands at 1731 and 1723 cm(-1). The dominant band at 1723 cm-1 may arise from the highly ordered crystalline component of the copolymer, and the weaker band at 1731 cm(-1) is possibly due to the minor crystalline component with a less ordered structure. The major crystalline band at 1723 cm(-1) shares asynchronous cross peaks with the amorphous band at 1740 cm(-1). This observation suggests that the melting of the crystalline structure does not simultaneously result in the formation of the completely amorphous structure. The phase transition process of P(HB-co-HHx) (12 mol% HHx) takes place through an intermediate state. It is noted that the vibrational frequencies of the C=O, C-O-C, and C-H stretching bands due to the crystalline components of P(HB-co-HHx) (12 mol%, Mix) are almost identical to those of PHB. These observations indicate that the helical structure of P(HB-co-HHx) (12 mol%. HHx) is very similar to that of PHB. The inclusion of the HHx comonomer locally disrupts the highly ordered and helical structure of PHB from place to place, thereby reducing the crystallinity of the copolymer. It was also found that the helical structure of P(HB-co-HHx) (12 mol% HHx) is deformed gradually from much lower temperature than that of PHB. (C) 2004 Elsevier B.V. All rights reserved.

    ELSEVIER SCIENCE BV, 2004年12月, VIBRATIONAL SPECTROSCOPY, 36 (2), 241 - 249, 英語

    [査読有り]

    研究論文(学術雑誌)

  • A Padermshoke, H Sato, Y Katsumoto, S Ekgasit, Noda, I, Y Ozaki

    Crystallization behaviour of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (P(HB-co-HHx)) (HHx = 12 mol%) was studied by means of two-dimensional infrared (2D IR) correlation spectroscopy. Three types of crystallization; the gradual cooling from the melt, the isothermal crystallization of the supercooled melt, and the isothermal crystallization of the solution-cast film were investigated. The order of crystal growth steps taking place during the three different types of crystallization processes was analyzed in detail. It was revealed by the asynchronous 21) correlation spectra generated from the dynamic IR spectra in the C=O stretching band region that the development of the highly ordered crystals occurs prior to that of the less ordered crystals for the gradual cooling crystallization. On the other hand, for the supercooled melt and solution-cast film crystallization, the formation of the less ordered crystals takes place before that of the highly ordered crystals. The transition from the amorphous phase to the less ordered crystals is a simultaneous process for all three types of crystallization. (C) 2004 Elsevier Ltd. All rights reserved.

    ELSEVIER SCI LTD, 2004年09月, POLYMER, 45 (21), 7159 - 7165, 英語

    [査読有り]

    研究論文(学術雑誌)

  • A Padermshoke, Y Katsumoto, H Sato, S Ekgasit, Noda, I, Y Ozaki

    The surface melting and crystallization behavior of two biodegradable polyesters, poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (P(HB-co-HHx)) (HHx = 12 mol%) and poly(3-hydroxybutyrate) (PHB), were investigated by using attenuated total reflection (ATR) and transmission infrared (IR) spectroscopy coupled with the generalized two-dimensional (2D) correlation analysis. IR bands in the C=O stretching vibration region were analyzed to explore the changes in crystallinity at the surface and those in the bulk of the polymer film samples during the melting and crystallization processes. Due to the intrinsic sub-micrometer sampling depth of the ATR technique, spectral information attributed to the chemical moieties situated at the surface region of the film samples can be observed. The present study revealed that the surface melting of P(HB-co-HHx) takes place through an intermediate state. The distribution of crystalline phase detected by the ATR technique and that detected by the transmission technique suggested that the polymer crystals tend to grow at the surface in a manner different from that in the bulk. It is very likely that the population of polymer crystals at the surface is higher than that in the bulk for both P(HB-co-HHx) and PHB. The time-dependent IR spectral variations for P(HB-co-HHx) and those for PHB indicated that P(HB-co-HHx) crystallizes much slower than PHB. This observation suggested that the HHx units incorporated in P(HB-co-HHx) markedly reduce not only the degree of crystallinity but also the crystallization rate of PHB homopolymer. (C) 2004 Elsevier Ltd. All rights reserved.

    ELSEVIER SCI LTD, 2004年09月, POLYMER, 45 (19), 6547 - 6554, 英語

    [査読有り]

    研究論文(学術雑誌)

  • H Sato, R Murakami, A Padermshoke, F Hirose, K Senda, Noda, I, Y Ozaki

    Infrared (IR) spectra of new types of bacterial copolyester, poly(3-hydroxybutyrate-co-3-hydroxyhexanoate), P(HB-co-HHx) (HHx = 2.5, 3.4, and 12 mol %), and poly(3-hydroxybutyrate) (PHB) were measured over a temperature range of 20 degreesC to higher temperatures (PHB, 185 degreesC; HHx = 2.5 mol %, 160 degreesC; HHx = 3.4 mol %, 160 degreesC; HHx = 12 mol %, 140 degreesC) to explore their structure and thermal behavior. The temperature-dependent IR spectral variations were analyzed for the CH stretching, C=O stretching, CH3 deformation, and C-O-C stretching vibration regions, and bands characteristic of crystalline and amorphous parts were identified in each region. It has been found from the anomalous frequencies of the CH3 asymmetric stretching bands of the four polymers and the X-ray crystallographic structure of PHB that there is an inter- or intramolecular interaction (C-(HO)-O-... hydrogen bond) between the C=O group in one helical structure and the CH3 group in the other helical structure in PHB and P(HB-co-HHx). The bonding energy of the C-(HO)-O-... hydrogen bond seems to be smaller than 4 kJ/mol, but considering the heat of fusion (12.5 kJ/mol) of PHB, it is likely that a chain of C-(HO)-O-... hydrogen bond pairs link two parallel helical structures in the crystalline parts. The temperature-dependent IR spectral variations have shown that the crystallinity of P(HB-co-HHx) (HHx = 12 mol %) decreases gradually from a fairly low temperature (about 60 degreesC), while the crystallinity of PHB and P(HB-co-HHx) (HHx = 2.5 and 3.4 mol %) remains almost unchanged until just below their melting temperatures. It has also been revealed from the present study that the weakening of the C-(HO)-O-... interaction starts from just above room temperature and proceeds gradually with increase in temperature, but the collapse of helical structure occurs at a much higher temperature for all the polymers investigated.

    AMER CHEMICAL SOC, 2004年09月, MACROMOLECULES, 37 (19), 7203 - 7213, 英語

    [査読有り]

    研究論文(学術雑誌)

  • H Sato, M Nakamura, A Padermshoke, H Yamaguchi, H Terauchi, S Ekgasit, Noda, I, Y Ozaki

    The thermal behavior and molecular interaction of a new type of bacterial copolyester, poly(3-hydroxybutyrate-co-3-hydroxyhexanoate), P(HB-co-HHx) (HHx = 12 mol %), was investigated by using wide-angle X-ray diffraction (WAXD) and differential scanning calorimetry (DSC). The WAXD measurements were carried out over a temperature range from 25 to 110 degreesC in the scattering angle range of 20 = 5-13degrees. The WAXD pattern at room temperature shows that the P(HB-co-HHX) copolymer has an orthorhombic system (alpha = beta = gamma = 90degrees) with a = 5.76 Angstrom, b = 13.20 Angstrom, and c = 5.96 Angstrom (fiber repeat), which is identical to the crystal system of poly(3-hydroxybutyrate) (PHB) homopolymer. However, temperature-dependent variations in the lattice parameters, a and b, of P(HB-co-HHx) are quite different from those of PHB. Only the a lattice parameter increases with temperature, while the b lattice parameter changes very little in the case of crystalline P(HB-co-HHx). It seems that the intermolecular and intramolecular interactions between the C=O group and the CH3 group decrease along the a axis of crystalline P(HB-co-HHx) with temperature. The (110) peak area of P(HB-co-HHx) starts decreasing from around 50 degreesC while that of PHB changes little at least until 140 degreesC, indicating that the crystallinity of PHB remains almost unchanged until 140 degreesC, but that of P(HB-co-HHx) decreases gradually from fairly low temperature (similar to50 degreesC). The DSC measurement of the chloroform solution cast P(HB-co-HHx) shows a recrystallization peak around 51 degreesC. The (110) peak area of WAXD pattern of the chloroform solution cast P(HB-co-HHx) shows a maximum value at around 54 degreesC. The maximum of the (110) peak area demonstrates the recrystallization process of P(HB-co-HHx). The result is in a good agreement with the result of the DSC measurement.

    AMER CHEMICAL SOC, 2004年05月, MACROMOLECULES, 37 (10), 3763 - 3769, 英語

    [査読有り]

    研究論文(学術雑誌)

  • S Sasic, Y Katsumoto, H Sato, Y Ozaki

    Our recently proposed idea of moving window two-dimensional (2D) correlation spectroscopy, which partitions a data set into series of relatively small submatrices (windows) and calculates their covariance maps in succession, is tested for three convoluted data set. Phase-transition temperatures of oleic acid and poly-(N-isopropylacrylamide) in an aqueous solution are sought by analyzing covariances of their temperature-dependent near-infrared and infrared spectra, respectively, while Raman spectra of three kinds of polyethylene (PE) pellets are investigated to find the spectral differences among them and to classify randomly ordered spectra by a sample-sample (SS) covariance map. The criterion of mean of standard deviation of covariance matrices is used as an indicator of the crucial information present in these matrices so that only a few of them are discussed in details. The results are obtained quickly after very simple calculations and are studied at length. The baseline variation is not removed prior to the calculations but is found to be of use for the determination of the phase-transition temperatures. Randomly ordered Raman spectra of the PE pellets are classified by innovatively used and interpreted SS slice spectra, with the relation to principal component analysis discussed.

    AMER CHEMICAL SOC, 2003年08月, ANALYTICAL CHEMISTRY, 75 (16), 4010 - 4018, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Molecular Structure, Crystallinity, and Morphology of Uncompatibilized and Compatibilized Blends of Polyethylene/Nylon 12

    Harumi Sato, Shigehiro Sasao, Kimihiro Matsukawa, Yasuo Kita, Hiroshi Yamaguchi, Heinz W. Siesler, Yukihiro Ozaki

    2003年04月, Macromol. Chem. Phys., 204, 1351 - 1358, 英語

    [査読有り]

    研究論文(学術雑誌)

  • S Sasic, JH Jiang, H Sato, Y Ozaki

    A simple method that facilitates analysis of chemical images is presented. It is based on so-called two-dimensional (2D) correlation spectroscopy and its main purpose is to identify the most specific spectra in an imaging set. The selection is achieved by measuring correlation among the spectra via sample-sample (SS) correlation technique. The idea of SS correlation is exemplified through a simple model and then applied to the mapping Raman spectra of compatibilized (a mixture of two polymers is made homogenous thereby improving its useful plastic properties) and uncompatibilized (mechanically blended) blends of Nylon 12/high-density polyethylene (HDPE), and poly(ethyleneterephthalate)(PET)/HDPE. The Raman spectra of the blends are analyzed with and without pre-treatments (baseline correction by an nth order polynomial, and normalization), and it is found that the results are significantly dependent on the pre-treatment. It is concluded that all the analyzed blends do not exhibit band-shape variation despite the compatibilization, but appear to have unique vibrational signatures, i.e. each blend is found to be completely represented by only one spectrum. The sensitivity of the employed SS correlation method is illustrated through making distinction among heavily overlapped spectra differing minutely in the baseline.

    ROYAL SOC CHEMISTRY, 2003年, ANALYST, 128 (8), 1097 - 1103, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Near infrared spectra of pellets and thin films of high-density, low-density and linear low-density polyethylenes and prediction of their physical properties by multivariate data analysis

    H Sato, M Shimoyama, T Kamiya, T Amari, S Sasic, T Ninomiya, HW Siesler, Y Ozaki

    The aim of the present study is to investigate in detail the near infrared (NIR) spectra of the three types of polyethylene, linear low-density polyethylene (LLDPE), low-density polyethylene (LDPE) and high-density polyethylene (HDPE), and to develop calibration models that predict their physical properties such as density, crystallinity and melting point. The effects of spectral resolution on the classification and the prediction of density for the three types of PE have been investigated. Furthermore, the NIR spectral differences among LLDPE, LDPE and HDPE have been explored in more detail using 2 cm(-1) resolution. Principal component analysis (PCA) has been performed to differentiate the 18 samples of PE. They are classified into three groups, LLDPE, LDPE and HDPE, by a score plot of the PCA Factor 1 versus 3 based on the NIR spectra pretreated by multiplicative scatter correction (MSC). The 2 cm(-1) spectral resolution yields a slightly better result for the classification. Partial least squares (PLS) regression has been applied to the NIR spectra after MSC to propose calibration models that predict the density, crystallinity and melting point of HDPE, LDPE and LLDPE. The correlation coefficient for the density was calculated to be 0.9898, 0.9928, 0.9925 and 0.9872 for the spectra obtained at 2, 4, 8 and 16 cm(-1) resolutions, respectively, and the root mean square error of cross validation (RMSECV) was found to be 0.0021, 0.0018, 0.0018 and 0.0023 g cm(-3), respectively. It has been found that the correlation coefficient and RMSECV for the prediction of the density and crystallinity change little with the spectral resolution. However, for the prediction of melting point, the higher resolutions (2 and 4 cm(-1) resolution) provide slightly better results than the lower resolutions. NIR transmission spectra of thin films of LLDPE, LDPE and HDPE have also been investigated, and calibration models for predicting their density have been developed for the film spectra.

    N I R PUBLICATIONS, 2003年, JOURNAL OF NEAR INFRARED SPECTROSCOPY, 11 (4), 309 - 321, 英語

    [査読有り]

    研究論文(学術雑誌)

  • H Sato, M Shimoyama, T Kamiya, T Amari, S Sasic, T Ninomiya, HW Siesler, Y Ozaki

    Raman spectra have been measured for pellets of five samples of high-density polyethylene (HDPE), seven samples of low-density polyethylene (LDPE), and six samples of linear low-density polyethylene (LLDPE). The obtained Raman spectra have been compared to find out characteristic Raman bands of HDPE, LDPE, and LLDPE. Principal component analysis (PCA) was applied to the Raman spectra in the 1600-650 cm(-1) region after multiplicative scatter correction (MSC) to discriminate the Raman spectra of the three different PE species. They are classified into three groups by a score plot of PCA factor 1 vs. 2. HDPE with high density and high crystallinity gives high scores on the factor I axis, while LDPE with low density and low crystallinity yields negative scores on the same axis. It seems that factor I reflects the density or crystallinity. A PC weight loadings plot for factor I shows six upward peaks corresponding to the bands arising from the crystalline parts or all-trans -(CH2)(n)- groups and seven downward peaks ascribed to the bands of the amorphous or anisotropic regions and those arising from the short branches. Partial least-squares (PLS-1) regression was applied to the Raman spectra after MSC to propose calibration models that predict the density, crystallinity, and melting points of the polyethylenes. The correlation coefficient was calculated to be 0.9941, 0.9800, and 0.9709 for the density, crystallinity, and melting point, respectively, and their root-mean-square error of cross validation (RMSECV) was found to be 0.0015, 3.3707, and 2.3745, respectively. The loadings plot of factor 2 for the prediction of melting point is largely different from those for the prediction of density and crystallinity. (C) 2002 Wiley Periodicals, Inc.

    JOHN WILEY & SONS INC, 2002年10月, JOURNAL OF APPLIED POLYMER SCIENCE, 86 (2), 443 - 448, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Raman mapping study of compatibilized and uncompatibilized polymer blends of Nylon 12 and polyethylene

    H Sato, S Sasao, K Matsukawa, Y Kita, T Ikeda, H Tashiro, Y Ozaki

    Raman mapping images have been obtained for compatibilized and uncompatibilized polymer blends in films of Nylon 12 and high density polyethylene (HDPE) (blend ratios were 20/80, 50/50, and 80/20). A total of 400 Raman spectra were measured for each sample with areas of 100 mum(2) and in step sizes of 0.5 mum (for 20 X 20 probe spots). To develop the Raman mapping images, the intensity ratio of two bands, a band at 1635 cm(-1) due to Nylon 12 (amide I mode) and that at 1296 cm(-1) arising from both HDPE and Nylon 12 (CH2 twisting) is used. The Raman mapping images of the uncompatibilized polymer blends show a clear "sea-island" structure while those of the compatibilized polymer blends exhibit a compatibilized structure. The Raman mapping images enable simultaneous exploration of the morphology and molecular structure of the blends. We have also developed a Raman mapping image that represents the variation of crystallinity in the uncompatibilized film.

    SOC APPLIED SPECTROSCOPY, 2002年08月, APPLIED SPECTROSCOPY, 56 (8), 1038 - 1043, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Y Katsumoto, T Tanaka, H Sato, Y Ozaki

    A conformational change in the coil-globule transition of poly(N-isopropylacrylamide) (PNiPA) was investigated by Fourier transform infrared (FT-IR) spectroscopy with attenuated total reflection (ATR) method and density functional theory (DFT) calculations. ATR/IR spectra of PNiPA in an aqueous solution change dramatically in the vicinity of the coil-globule transition temperature (theta temperature). Below the theta temperature, unimodal peaks are observed at 1624 cm(-1) in the amide I re ion and at 1562 cm(-1) in the amide II region, respectively. Above the theta temperature, a new peak appears abruptly near 1653 cm(-1) in the amide I region and the amide If band shifts gradually to a lower frequency by 6 cm(-1). In the amide III region, the relative intensity of a band at 1173 cm(-1) is weaker than that of a band at 1155 cm(-1) at lower temperatures, but it becomes larger during the coil-globule transition of PNiPA. DFT calculation for dimer models of PNiPA suggests that the amide I band at 1624 cm(-1) is assigned mainly to a stretching vibration of the C=O group that forms a strong hydrogen bond with the N-H bond of a neighboring amide group. The band at 1653 cm(-1) observed above the theta temperature may be due to a free C=O group. It is, therefore, suggested that some of the intramolecular hydrogen bonds between neighboring amide groups are broken during the coil-globule transition. Furthermore, it is deduced from the DFT calculation that the relative intensity of the bands at 1173 and 1155 cm(-1) in the amide III region reflects the population change in the gauche and trans conformations in the main chain during the coil-globule transition.

    AMER CHEMICAL SOC, 2002年04月, JOURNAL OF PHYSICAL CHEMISTRY A, 106 (14), 3429 - 3435, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Near-infrared spectroscopic study of interaction between methyl group and water in water-methanol mixtures

    D Adachi, Y Katsumoto, H Sato, Y Ozaki

    Near-infrared spectra were measured for water-methanol mixtures with a methanol content of 0-100 wt % at 25 degreesC. The second derivative of the NIR spectra clearly reveals that the first overtones of the CH3 asymmetric stretching modes of methanol near 5950 and 5900 cm(-1) show a downward shift by about 30 cm(-1) with the increase in the concentration of methanol. This is unambiguous evidence for the direct interaction of the CH3 group of methanol with the OH group of water. Similar downward shifts were also observed for water-ethanol and water-l-propanol mixtures, although the shifts are much smaller for the water-ethanol and water-1-propanol mixtures. Based upon the results of NIR spectra, we propose a model for the interaction between the C-H bond of the CH3, group of methanol and water. This Intermolecular interaction is analogous to the intramolecular "(O) CH (...) O" interaction in compounds having both a CH3 group binding to an oxygen atom and an OH group. This paper demonstrates novel potential of NIR spectroscopy in investigating interactions containing a C-H bond.

    SOC APPLIED SPECTROSCOPY, 2002年03月, APPLIED SPECTROSCOPY, 56 (3), 357 - 361, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Harumi Sato, Yukiteru Katsumoto, Shigehiro Sasao, Kimihiro Matsukawa, Yasuo Kita, Heinz W. Siesler, Yukihiro Ozaki

    The crystallinity of non-molten and pre-molten uncompatibilized and compatibilized polymer blends of high density polyethylene (HDPE)/Nylon 12 have been investigated by using FT-Raman spectroscopy, differential scanning calorimetry (DSC), and wide angle X-ray diffraction (WAXD). The FT-Raman, DSC, and WAXD measurements have revealed that the crystallinity of HDPE of both uncompatibilized and compatibilized blends increases upon melting except for the compatibilized blend with the Nylon 12 content of 80 wt%. The degree of the increase is significantly larger for the uncompatibilized blends than the compatibilized blends. The FT-Raman data suggests that the crystallinity of the compatibilized blend with the Nylon 12 content of 80 wt% decreases slightly after melting. It is very likely that the compatibilized polymer blends are well oriented during the melting and molding process by an extruder because of the existence of maleic anhydride (MAH)-grafted copolymer as a compatibilizer. In contrast, it seems that the uncompatibilized polymer blends are not so much oriented and have more amorphous phase in the Nylon 12 rich region before melting. Thus, the melting process induces a recrystallization process.

    2002年, Macromolecular Symposia, 184, 339 - 348, 英語

    [査読有り]

    研究論文(国際会議プロシーディングス)

  • Usefulness of a curve fitting method in the analysis of overlapping overtones and combinations of CH stretching modes

    Y Katsumoto, D Adachi, H Sato, Y Ozaki

    This paper reports the usefulness of a curve fitting method in the analysis of NIR spectra. NIR spectra in the 7500-5500 cm(-1) (1333-1818 nm) region were measured for water-methanol, water-ethanol and water-1-propanol mixtures with alcohol concentrations of 0-100 wt% at 25degreesC. The 6000-5600 cm(-1) (1667-1786 nm) region, where the overtones and combinations of CH3 and CH2 stretching modes are expected to appear, shows significant band shifts with the increase in the alcohol content. To analyse the concentration-dependent spectral changes, a curve fitting method was utilised, and the results were compared with those obtained previously by a second derivative method. It was found that the first overtones of CH3 asymmetric and symmetric stretching modes of alcohols show a downward shift by about 15-30 cm(-1) with the increase in the concentration of alcohols. The shifts are much larger for water-methanol mixtures than for water-ethanol and water-1-propanol mixtures. The first overtones and combinations of CH2 stretching modes of ethanol and 1-propanol also show a small downward shift. These shifts support our previous conclusion that there is an intermolecular "CH...O" interaction between the methyl group and water in the water-alcohol mixtures. The curve fitting method provided more feasible results for the band shifts than the second derivative method. It was revealed from the curve fitting method that the first overtone of the CH3 asymmetric stretching mode of water-methanol, water-ethanol and water-1-propanol mixtures shows different concentration-dependent plots. The first overtone of CH3 asymmetric stretching mode of water-methanol mixtures shifts more rapidly in the high methanol concentration range while that of water-1-propanol concentration shifts more markedly in the low 1-propanol concentration range. That of water-ethanol mixtures shows an intermediate trend. Based upon these differences structural differences among the three kinds of water-alcohol mixtures are discussed.

    N I R PUBLICATIONS, 2002年, JOURNAL OF NEAR INFRARED SPECTROSCOPY, 10 (1), 85 - 91, 英語

    [査読有り]

    研究論文(学術雑誌)

  • ZJ Zhang, T Imae, H Sato, A Watanabe, Y Ozaki

    A self-assembled monolayer film (SAM) of 2,3,7,8,12,13,17, 18-octaethylporphinatozinc formed on a gold surface premodified with a SAM of 4-pyridinethiol was studied by means of surface-enhanced Raman scattering (SERS), surface-enhanced infrared absorption (SEIRA), and ultraviolet-visible (UV-vis) spectroscopies. The SERS spectrum of the porphyrin monolayer on the pyridine-modified Au surface shows bands only from the underlying pyridine group. The frequency shift and change in the relative intensity of the bands due to the pyridine group in the SERS spectra imply indirectly the binding of the metalloporphyrin to the pyridine group in the SAM. This is further supported by the SEIRA spectra of the porphyrin-pyridine SAM, in which vibrational bands arising from both the porphyrin moiety and the pyridyl group appear clearly. In addition, the UV-vis spectra also suggest the formation of the porphyrin-pyridine SAM and the weak porphyrin-porphyrin interactions in the SARI.

    AMER CHEMICAL SOC, 2001年07月, LANGMUIR, 17 (15), 4564 - 4568, 英語

    [査読有り]

    研究論文(学術雑誌)

  • 複雑な分子スペクトルをいかに解析するか-振動スペクトルを例として-(2)

    勝本之晶, 佐藤春実, 宇田明史, 尾崎幸洋

    2001年05月, 52, 393 - 405, 日本語

    研究論文(学術雑誌)

  • 複雑な分子スペクトルをいかに解析するか-振動スペクトルを例として-(1)

    勝本之晶, 佐藤春実, 宇田明史, 尾崎幸洋

    2001年04月, 化学工業, 52, 268-292, 日本語

    研究論文(学術雑誌)

  • Masami Okamoto, Hideyuki Taguchi, Harumi Sato, Tadao Kotaka, Hiroshi Tateyama

    Dispersed rheology of lipophilized-smectite (SAN)/toluene (TOL) suspensions with various concentrations φ of (0.03-3.77) × 10-2 vol fraction was examined by a stress-controlled rheometer and Ubbelohde type viscometer. Under the quiescent state of the SAN/TOL suspensions, the original laminate structure in the solid state of SAN was lost and exfoliation of the silicate layers took place as revealed by X-ray diffraction analysis. In the dilute SAN/TOL suspension with 102φ ≤ 0.2, the value of ηsp/φ (ηsp being specific viscosity) is independent of concentration up to φ approx. 2 × 10-3 and exhibits abrupt increasing beyond φ approx. 2 × 10-3. The dense concentration region exhibits elastic gel-like properties, and rheopexy behavior imposed by shear stress was observed. The limiting value of the dynamic storage modulus G′ was given by G′(ωYLD0) approx. φ4, whereas the loss tangent δ exhibited independence of φ and remains at a constant value of about 0.1.

    ACS, 2000年05月02日, Langmuir, 16 (9), 4055 - 4058, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Dispersed Structure and Rheology of Lipophilized-Smectite/Toluene Suspensions

    Masami Okamoto Hideyuki Taguchi Harumi Sato Tadao Kotaka Hiroshi Tateyama

    2000年04月07日, Langumuir, 17, 4564 - 4568, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Masami Okamoto, Harumi Sato, Hideyuki Taguchi, Tadao Kotaka

    Society of Rheology, 2000年, Nihon Reoroji Gakkaishi, 28 (4), 199 - 200, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Phase separation process during solution casting of acrylate-copolymer/fluoro-copolymer blends

    Y Kano, H Sato, M Okamoto, T Kotaka, S Akiyama

    For the P(2EHA-AA-VAc)/P(VDF-HFA)/THF ternary system, the phase separation process during solution casting was examined via Rayleigh scattering measurement. The scattered intensity of the scattering vector q at various times for the P(2EHA-AA-VAc)/P(VDF-HFA) 30/70 blend having a gradient domain morphology revealed that the gradient structure formed according to both spinodal decomposition (SD) and nucleation growth (NG) mechanisms.

    TAYLOR & FRANCIS LTD, 1999年, JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY, 13 (11), 1243 - 1251, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Hiroshi Kubo, Harumi Sato, Masami Okamoto, Tadao Kotaka

    Rayleigh scattering studies were conducted in order to examine the elongational flow-induced crystallization behaviour of poly(ethylene terephthalate) (PET) in the supercooled liquid state (100-130°C). In the specimen elongated at 110°C where spherulite growth was negligible, initially nothing happened, but flow-induced crystallization then occurred rather suddenly at a critical tensile strain of ∈(= ∈̇0t) ≈ 2 in Hencky units, independent of the strain rate ∈̇0. At this temperature the Hv (cross-polarized) scattering yielded two-point patterns parallel to the elongational direction with strong streaks in the perpendicular direction. The result implies that molecular orientation proceeded along the flow direction and the crystalline domain grew transverse to the oriented chains. In contrast, at 130°C, especially with low ∈̇0, where spherulite growth was rapid, a four-leaf-clover pattern typical of spherulites was observed at the start of elongation ∈ = 0. In the following stages, spherulite growth surpassed the destruction of existing spherulites and/or flow-induced oriented crystallite formation, and a smeared four-leaf-clover pattern was thus observed even at a level of ∈ = 1.3. © 1997 Elsevier Science Ltd.

    Elsevier BV, 1998年, Polymer, 39 (2), 501 - 503, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Nondestructive discrimination of biological materials by near-infrared Fourier transform Raman spectroscopy and chemometrics: Discrimination among hard and soft ivories of African elephants and mammoth tusks and prediction of specific gravity of the ivories

    M Shimoyama, H Maeda, H Sato, T Ninomiya, Y Ozaki

    This paper demonstrates the usefulness of near-infrared (NIR) Fourier transform (FT) Raman spectroscopy and chemometrics in nondestructive discrimination of biological materials. The discrimination among three kinds of materials-hard ivories, soft ivories, and mammoth tusks-has been investigated as an example. NIR (1064-nm) excited FT-Raman spectra were measured in situ for these materials, and principal component analysis (PCA) of the obtained spectra was carried out over the 1800-400-cm(-1) region. The two kinds of ivories are clearly discriminated from one another on the basis of a one-factor plot. It was found that treatment of the Raman data by multiplicative scatter correction (MSC) greatly improves the ability to discriminate. Principal component weight loadings show that the discrimination relies upon the ratio of collagen and hydroxyapatite included in two kinds of ivories. The discrimination among the hard and soft ivories and mammoth tasks was made by a three-factor plot for FT-Raman spectra after the MSC treatments. Partial least-squares regression (PLSR) enabled us to make a calibration model which predicts the specific gravity of the hard and soft ivories.

    SOC APPLIED SPECTROSCOPY, 1997年08月, APPLIED SPECTROSCOPY, 51 (8), 1154 - 1158, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Critical behavior in a polymer blend

    H Sato, N Kuwahara, K Kubota

    Static and dynamic critical behaviors were studied for a mixture of polydimethylsiloxane (M(w) = 1.91 x 10(4), M(w)/M(n) < 1.03) and polyethylmethylsiloxane (M(w) = 1.40 x 10(4), M(w)/M(n) < 1.02) using coexistence curve, turbidity, light scattering, and viscosity measurements. The critical point was determined precisely from the coexistence curve as the critical composition W-c,W-PEMS = 55.04 wt% and the critical mixing temperature T-c = 30.622 degrees C. The critical exponents for the shape of the coexistence curve (beta), the osmotic compressibility (gamma), the long-range correlation length (nu), the correction for the static correlation function (eta), and the shear viscosity (phi) are 0.327+/-0.003, 1.25+/-0.02, 0.63+/-0.02, 0.038+/-0.003, and 0.029+/-0.003, respectively, with xi(0) = 1.62+/-0.05 nm. The present critical polymer blend belongs to the universality class of the three-dimensional Ising model, similar to simple binary liquid mixtures. The crossover from Ising to mean-field behavior was not observed, and this observation is consistent with the crossover function of recent theoretical work. A clear shear effect on the viscosity was observed near the critical point. The critical part of the diffusion coefficient is rather well represented by the dynamic scaling function based on mode coupling theory, confirming the validity of the dynamic scaling concept for the polymer blend.

    AMERICAN PHYSICAL SOC, 1996年04月, PHYSICAL REVIEW E, 53 (4), 3854 - 3863, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Nobuhiro Kuwahara, Harumi Sato, Kenji Kubota

    The coexistence curve of poly(dimethylsiloxane) (Mw=1.91×104,Mw/ Mn< 1.03) and poly(ethylmethylsiloxane) (Mw=1.40×104,Mw/Mn< 1.02) was determined in the neighborhood of its critical point with a differential refractometer. The critical mixing point established by the coexistence curve was Tc=30.622±0.005 °C and Wc,PEMS=55.04±0.04 wt %. The coexistence curve near the critical mixing point could be fitted well by a critical exponent β of 0.327. The turbidity could also be fitted by using ν=0.65 for the correlation length and γ=1.20 for the osmotic compressibility, showing the three-dimensional Ising model universality. © 1995 The American Physical Society.

    1995年, Physical Review Letters, 75 (8), 1534 - 1537, 英語

    [査読有り]

    研究論文(学術雑誌)

  • LIGHT-SCATTERING STUDY OF THE SWELLING PROCESS OF POLY(ACRYLONITRILE-CO-BUTENE)-GRAFT-POLY(ACRYLONITRILE-CO-METHYLACRYLATE) FILM

    A GOTO, N KUWAHARA, H SATO, K KUBOTA

    The time evolution of the size and density of the swollen domains during the swelling of poly(acrylonitrile-co-butene)-graft-poly(acrylonitrile-comethylacrylate) film in methanol was studied by light scattering measurements. The observed scattered light intensity was analyzed by the Guinier plot. The time evolution of the mean radius R(t)BAR and number density N(t) of the swollen domains was given R(t)BAR3 approximately t0.12 N(t) approximately t1.42.

    JOHN WILEY & SONS LTD, 1994年11月, POLYMER INTERNATIONAL, 35 (3), 219 - 224, 英語

    [査読有り]

    研究論文(学術雑誌)

  • PHASE-SEPARATION IN A DILUTE POLYMER-SOLUTION IN A METASTABLE REGION

    H SATO, N KUWAHARA, K KUBOTA

    The time evolution of phase separation in a supercooled dilute polymer solution (polystyrene in diethyl oxalate) in a metastable region was studied by time-resolved dynamic and static light scattering. The mean radius R(t) and the total number density N(t) of droplets consisting of the minority phase were obtained as R(t)similar to t(1) and N(t)similar to t(0) in the growth stage, and as R(t)similar to t(1/3) and N(t)similar to t(-1) in the coarsening stage.

    AMER PHYSICAL SOC, 1994年09月, PHYSICAL REVIEW E, 50 (3), R1752 - R1754, 英語

    [査読有り]

    研究論文(学術雑誌)

  • CRITICAL-BEHAVIOR OF A CATIONIC SURFACTANT IN AN AQUEOUS SALT SOLUTION

    K KUBOTA, N KUWAHARA, H SATO

    The critical behavior of a cationic surfactant, butyl-tetradecyldimethylammonium bromide, in an aqueous 4M-NaBr solution was investigated concerning the isothermal osmotic compressibility and long-range correlation length by means of light scattering, coexistence curve, and turbidity. The critical exponents were obtained as gamma'=1.39+/-0.04 and nu'=0.70+/-0.03 together with xi(0)= (2.48+/-0.06) nm, and beta' = 0.375+/-0.01. The temperature dependence of turbidity showed a good accordance with the result of light scattering measurement. Negative alpha' was obtained from the scaling relation. The critical exponents are in good agreement with the Fisher-renormalization prediction for the ternary system (almost fully renormalized Ising exponents).

    AMER INST PHYSICS, 1994年03月, JOURNAL OF CHEMICAL PHYSICS, 100 (6), 4543 - 4547, 英語

    [査読有り]

    研究論文(学術雑誌)

  • H. Sato, N. Kuwahara, K. Kubota

    The time evolution of phase separation in a supercooled dilute polymer solution (polystyrene in diethyl oxalate) in a metastable region was studied by time-resolved dynamic and static light scattering. The mean radius R(t) and the total number density N(t) of droplets consisting of the minority phase were obtained as R(t)t1 and N(t)t0 in the growth stage, and as R(t)t1/3 and N(t)t-1 in the coarsening stage. © 1994 The American Physical Society.

    1994年, Physical Review E, 50 (3), R1752 - R1754, 英語

    [査読有り]

    研究論文(学術雑誌)

  • CONCENTRATION FLUCTUATION IN A POLYMER MIXTURE

    N KUWAHARA, H SATO, K KUBOTA

    The critical behavior in a mixture of polystyrene and polymethylphenylsiloxane has been examined by the angular distribution of the scattered light intensity over 5.7 < k < 19.6 mum-1 and 0.045 < T- T(c) < 2.4-degrees-C, where k is the scattering wave number and T(c) is the critical mixing temperature. The osmotic compressibility obeys a relation chi(T) approximately (T-T(c))-gamma with gamma=1.22+/-0.02 and the long-range correlation length xi approximately (T-T(c))-nu with nu=0.62+/-0.02, in good agreement with the three-dimensional Ising-model universality.

    AMERICAN PHYSICAL SOC, 1993年10月, PHYSICAL REVIEW E, 48 (4), 3176 - 3179, 英語

    [査読有り]

    研究論文(学術雑誌)

  • KINETICS OF SPINODAL DECOMPOSITION IN A POLYMER MIXTURE

    N KUWAHARA, H SATO, K KUBOTA

    The early-to-late stage of spinodal decomposition in a critical mixture of polystyrene and polymethylphenylsiloxane was studied by time-resolved light scattering over 1.8 < k < 21.1 mum-1 and 0 < t < 502 h, with k and t being the wave number and the elapsed time after temperature quench into the spinodal region, respectively. The time dependences of the maximum intensity of the scattered light I(m) and of the corresponding wave number k(m) were represented by the power laws; I(m) is-proportional-to t(beta) and k(m) is-proportional-to t(-alpha) with alpha = 0 in the early stage, alpha = 0.17 in the intermediate stage, and beta = 1.08 and alpha = 0.36 satisfying beta = 3alpha in the late stage. The behavior in the early stage was well expressed by the Cahn-Hillard theory. These exponent values are almost the same as those observed for Fe-Cr alloys. The behavior of the scaled structure factor in the late stage was expressed by a k-6 dependence in k(m) < k < 2k(m) and by a k-4 dependence in k > 2k(m), in good agreement with the recent theoretical prediction.

    AMERICAN PHYSICAL SOC, 1993年02月, PHYSICAL REVIEW E, 47 (2), 1132 - 1138, 英語

    [査読有り]

    研究論文(学術雑誌)

  • N. Kuwahara, H. Sato, K. Kubota

    1992年, The Journal of Chemical Physics, 97 (8), 5905 - 5907, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Tulika Sharma, Yoshiaki Nishio, Yuichiro Tamano, Harumi Sato, Isao Takahashi

    Elsevier BV, 2021年09月, Polymer, 230, 124103 - 124103

    [査読有り]

    研究論文(学術雑誌)

  • Atsushi Nishimae, Harumi Sato

    American Chemical Society (ACS), 2021年07月13日, Macromolecules, 54 (13), 6440 - 6448

    [査読有り]

    研究論文(学術雑誌)

  • Yusuke Morisawa, Erika Tanimura, Masahiro Ehara, Harumi Sato

    In this study, we explored the electronic structure of the surfaces of polyethylene samples having different crystallinities using attenuated total reflection (ATR) far-ultraviolet (FUV) spectroscopy and quantum chemical calculations. Specifically, the ATR-FUV spectra of five types of high-density polyethylene (HDPE), six types of linear low-density PE (LLDPE), and seven types of low-density PE (LDPE) were obtained. All the spectra contained an intense band near 156 nm and a broad band between 180 and 190 nm. Transmission spectra were obtained for the thin-film (30 µm) PE samples between 165 and 250 nm. In this region, the HDPE films show very low-intensity bands. In contrast, the transmission spectra of the LLDPE and LDPE samples yielded weak-to-medium and medium-intensity bands around 180-190 nm, respectively. In addition, to understand the differences in the absorption spectra among the PEs observed, we simulated the spectra of n-pentane as a PE crystal model using time-dependent density functional theory and found that the common intense band at 156 nm is due to the σ (C(2p)-H)→Rydberg 3s, 3p transition. The absorption bands near 180-190 nm may correspond to aggregates of numerous molecular chains in the amorphous parts of the LLDPE and LDPE samples.

    2021年05月13日, Applied spectroscopy, 37028211013425 - 37028211013425, 英語, 国際誌

    [査読有り]

    研究論文(学術雑誌)

  • Mirosław Antoni Czarnecki, Yusuke Morisawa, Yukiteru Katsumoto, Tomoyuki Takaya, Swapnil Singh, Harumi Sato, Yukihiro Ozaki

    Near-infrared spectroscopy (NIR) and DFT calculations were applied to study solvent effect on competition between weak and strong interactions in phenol solutions.

    Royal Society of Chemistry (RSC), 2021年, Physical Chemistry Chemical Physics, 23 (35), 19188 - 19194

    [査読有り]

    研究論文(学術雑誌)

  • 岩崎 穂積, 岡野 真人, 小松原 望, 中村 円香, 森脇 淳仁, 佐藤 春実, 渡邉 紳一

    テラヘルツ周波数領域には高分子特有の振動モードが存在しており、テラヘルツ光を用いた高分子材料の物性測定に、注目が集まっている。我々は高分子ポリ乳酸薄膜を延伸することで、ポリ乳酸に複屈折が生じることを発見した。また、複屈折の延伸率依存性をテラヘルツ帯の回転検光子型偏光計で調べた。さらにテラヘルツ時間領域分光法を用いて、延伸ポリ乳酸薄膜の複素屈折率が持つ偏光依存性を調べた。

    一般社団法人 日本物理学会, 2016年, 日本物理学会講演概要集, 71, 1354 - 1354, 日本語

MISC

  • S. Ishii, H. Suzuki, Y. Morisawa, H. Sato, S. Yamamoto, Y. Ozaki, C. Otani, T. Uchiyama, H. Hoshina

    Terahertz absorption spectra were measured for nylon-6/6, nylon-6, nylon-11 and nylon-12 by Fourier transform far-infrared spectroscopy. Different spectral features among the four species were interpreted as the characteristics of crystalline conformations of nylons. © 2012 IEEE.

    2012年, International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz, 英語

  • Xiaoli Sun, Longhai Guo, Harumi Sato, Yukihiro Ozaki, Shouke Yan, Isao Takahashi

    The exact molecular chain orientation of poly(beta-hydroxybutyrate) (PHB) in ultrathin films was successfully probed using surface-sensitive, grazing incidence X-ray diffraction techniques. The crystal orientation of spin-coated PHB films was very sensitive to free surface and thermal annealing. In pristine films, the free surface easily exerted its influence on PHB crystallization and caused lamellar orientation with the b-axis perpendicular to the film surface. The effect of the buried interface increased with temperature. With the increase in thermal annealing temperature, the lamellar orientation changed from the b-axis being perpendicular to the film surface to the c-axis becoming perpendicular to the film surface. As film thickness increased, the temperature, at which the lamellae with the b-axes oriented normal to the film surface disappeared, increased. The thickness and temperature dependence of the crystallization behavior of PHB in an ultrathin film could be attributed to the competition between the effects of the free surface and the buried interface. (C) 2011 Elsevier Ltd. All rights reserved.

    ELSEVIER SCI LTD, 2011年08月, POLYMER, 52 (17), 3865 - 3870, 英語

    [査読有り]

  • Shinya Ishii, Hiromichi Hoshina, Yusuke Morisawa, Harumi Sato, Isao Noda, Yukihiro Ozaki, Chiko Otani

    Isothermal crystallization of poly(3-hydroxy-butyrate) was studied by terahertz time-domain spectroscopy. The temporal change of the ratio between the crystalline and amorphous structure was estimated by the integrated absorption intensity. The crystallization process was discussed by using Avrmi's equation.

    IEEE, 2011年, 2011 36TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ), 英語

    [査読有り]

  • 研究も!子育ても!

    佐藤 春実

    2009年06月01日, 高分子, 58 (6), 日本語

  • 赤外・ラマン分光法

    尾崎 幸洋, 佐藤 春実

    日本分析化学会, 2007年06月05日, ぶんせき, 0 (390), 270 - 275, 日本語

  • Harumi Sato, Harumi Sato, Jiri Dybal, Jiri Dybal, Tadahisa Iwata, Tadahisa Iwata, Rumi Murakami, Rumi Murakami, Zhang Jianmina, Zhang Jianmina, Kohji Tashiro, Kohji Tashiro, Isao Noda, Isao Noda, Yukihiro Ozaki, Yukihiro Ozaki

    Infrared (IR) and Rama n spectra were measured for ultra-high-molecular- weight poly(3-hydroxybutyrate) (UHMW-PHB) to investigate the crystalline structure and orientation. Comparison of the Raman spectra of a- and ß-structures of PHB with the results of quantum chemical calculations revealed that the bands at 966, 935, 908, and 858 cm assignable to the ß-structure.

    2006年12月01日, Polymer Preprints, Japan, 55, 3563

  • 赤外・ラマン分光法と量子化学計算を用いたポリヒドロキシブタン酸の結晶構造と配向性に関する研究

    佐藤春実, DYBAL Jiri, 岩田忠久, 村上留美, ZHANG Jianming, 田代孝二, 野田勇夫, 尾崎幸洋

    2006年09月05日, 高分子学会予稿集(CD-ROM), 55 (2 Disk1), 2PF052, 日本語

  • Harumi Sato, Harumi Sato, Tadahisa Iwata, Tadahisa Iwata, Rumi Murakami, Rumi Murakami, Jiri Dybal, Jiri Dybal, Kohji Tashiro, Kohji Tashiro, Isao Noda, Isao Noda, Yukihiro Ozaki, Yukihiro Ozaki

    The crystalline structure and orientation of CH-O hydrogen bonding of Poly(hydroxybutyrate) have been explored by means of polarized infrared (IR) spectroscopy and quantam chemical calculation. It has been found that C=O and CH stretching bands show opposite behavior with polarization angle.

    2005年12月01日, Polymer Preprints, Japan, 54, 604

  • Harumi Sato, Harumi Sato, Rumi Murakami, Rumi Murakami, Yuriko Ando, Yuriko Ando, Kohji Tashiro, Kohji Tashiro, Isao Takahashi, Isao Takahashi, Isao Noda, Isao Noda, Yukihiro Ozaki, Yukihiro Ozaki

    Temperature-dependent x-ray diffraction and infrared (IR) spectra were measured for biodegradable poly(3-hydroxybutyrate) (PHB) and polyester, poly(3-hydroxybutyrate-co-3hydroxyhexanoate) P(HB-co-HHx) (HHx=2.5, 3.4, 10.5, and 12 mol %) to explore their crystal and lamella structure and the GH⋯O=C hydrogen bonding in them. It is very likely that the C-H⋯O=C hydrogen bonding stabilizes the chain holding in the lamella structure of PHB and P(HB-co-HHx) and affects the differences in the thermal behavior between PHB and P(HB-co-HHx).

    2005年12月01日, Polymer Preprints, Japan, 54, 3161 - 3162

  • ポリヒドロキシブタン酸におけるCH‐‐‐O=C水素結合の役割

    佐藤春実, 村上留美, 安藤ゆ里子, 田代孝二, 高橋功, 野田勇夫, 尾崎幸洋

    2005年09月05日, 高分子学会予稿集(CD-ROM), 54 (2 Disk1), 3E10, 日本語

  • 偏光赤外分光法と量子化学計算によるPoly(hydroxyalkanoate)中のCH‐‐‐O水素結合の研究

    佐藤春実, 岩田忠久, DYBAL Jiri, 村上留美, 田代孝二, 野田勇夫, 尾崎幸洋

    2005年05月10日, 高分子学会予稿集(CD-ROM), 54 (1 Disk1), 1C13, 日本語

  • 佐藤 春実, 尾崎 幸洋

    The crystalline structure and thermal behavior of new types of bacterial copolyester, poly (3-hydroxybutyrate-<I>co</I>-3-hydroxyhexanoate) and polyhydroxybutyrate, PHB have been explored by means of wide-angle x-ray diffraction (WAXD) and infrared (IR) spectroscopy. It has been found from the temperature dependent variations of the WAXD pattern and IR spectra that C-H…O hydrogen bonding between C=O groups and CH<SUB>3</SUB> groups along the <I>a</I> axis and that the interactions are broken little by little from just above room temperature. The C-H…O hydrogen bonding between C=O groups and...

    日本結晶学会, 2004年12月24日, 日本結晶学会誌, 46 (6), 426 - 432, 日本語

  • IR, Raman, and near-IR studies on structure-properties relationship in high-density and low-density polyethylenes.

    Y Ozaki, T Amari, S Sasic, H Sato, M Shimoyama, T Kamiya, T Ninomiya

    AMER CHEMICAL SOC, 2000年03月, ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 219, U502 - U502, 英語

    研究発表ペーパー・要旨(国際会議)

  • 減衰全反射遠紫外分光法によるナイロン極表面の電子状態の研究

    泰永愛佳, 森澤勇介, 森澤勇介, 佐藤春実, 江原正博, 池羽田晶文, 東昇, 尾崎幸洋

    2012年, 分子科学討論会講演プログラム&要旨(Web), 6th

  • 遠紫外減衰全反射分光法による液体アルカンとポリエチレンの電子状態研究

    立花慎, 森澤勇介, 池羽田晶文, 佐藤春実, 東昇, 尾崎幸洋

    2010年, 分析化学討論会講演要旨集, 71st

  • 近赤外分光法によるレシチン/水/イソオクタン系逆ミセルサイズと包含された水の状態の相関に関する研究

    中村健, 池羽田晶文, 佐藤春実, 尾崎幸洋

    2009年, 日本分析化学会年会講演要旨集, 58th

  • 近赤外分光法によるイオン性及び非イオン性界面活性剤逆ミセル中の水の状態比較

    中村健, 池羽田晶文, 佐藤春実, 尾崎幸洋

    2009年, 日本分析化学会年会講演要旨集, 58th

  • 遠紫外分光法による食品用ラップフィルムの分別と,ポリマーフィルムの厚さ依存測定の研究

    佐藤春実, 東昇, 東昇, 池羽田晶文, 尾崎幸洋

    2007年, 分析化学討論会講演要旨集, 68th

  • 水溶液中微量成分測定のための「ATR遠紫外分光装置」の開発

    東昇, 東昇, 池羽田晶文, 光岡基樹, 佐藤春実, 尾崎幸洋

    2007年, 分析化学討論会講演要旨集, 68th

  • 二液相分離臨界点近傍においてC-H伸縮振動数が示すユニバーサリティ・クラス

    池羽田晶文, 橋本千尋, 佐藤春実, 尾崎幸洋

    2006年, 溶液化学シンポジウム講演要旨集, 29th

書籍等出版物

  • 高分子の残留応力対策

    佐藤 春実

    その他, ㈱技術情報協会, 2017年02月, 日本語

    学術書

  • 「Spectroscopy of Polymer Nanocomposites」

    佐藤 春実

    その他, Elsevier, 2016年02月, 英語

    学術書

  • 近赤外分光法(第5章3節)

    尾崎 幸洋, 森澤 勇介, 森田 成昭, 新澤 英之, 二見 能資, 池羽田 晶文, 佐藤 春実, 源川 拓磨, 土川 覚, 大塚 誠, 作道 章一, 石川 大太郎

    共著, 講談社, 2015年03月, 日本語, 「近赤外分光法」編著者;尾崎幸洋 ㈱講談社(執筆担当箇所;5章3節「高分子化学」佐藤春実)(2015)

    学術書

  • 高分子赤外・ラマン分光法(第2部9章)

    佐藤 春実

    共著, 講談社, 2015年02月, 日本語, 高分子の結晶構造と分子間相互作用

    学術書

  • Characterization of Polymer Blends Miscibility,Morphology and Interfaces Volume2 Chapter22

    Harumi Sato, Miriam Unger, Dieter Fischer, Yukihiro Ozaki, Heinz W.Siesler

    共著, WILEY-VCH, 2015年02月, 英語, Characterization of polymer Blends by Infratrd,Near-Infrared,and Raman Imaging

    学術書

  • エッセンシャル化学

    尾崎 幸洋, 佐藤 春実, 勝本 之晶, 森田 成昭, 森澤 勇介, 山本 茂樹

    共著, 株式会社 培風館, 2015年01月, 日本語

    教科書・概説・概論

  • Raman, Infrared, and Near-Infrared Chemical Imaging; Chapter 14 “Vibrational Spectroscopy Imaging in Polymer Research”

    Harumi Sato, Jianhui Jiang, Hideyuki Shinzawa, Ru-Qin Yu, Yukihiro Ozaki

    共著, Wiley-VCH, 2011年01月, 英語

    学術書

  • 「高分子分析入門」第II部2章(3)「近赤外分光法」

    尾崎 幸洋, 佐藤 春実

    共著, 講談社, 2010年04月, 日本語

    学術書

  • 「高分子表面・界面分析法の新展開」 第9章「赤外・ラマン分光法による高分子の表面解析」

    佐藤 春実, 森田 成昭

    共著, シーエムシー, 2009年03月, 日本語

    学術書

  • 「高分子の表面改質・解析の新展開」 第2章6節「赤外・ラマン分光法による高分子の表面解析」

    佐藤 春実

    共著, シーエムシー, 2007年02月, 日本語

    学術書

  • 「先端の分析法-理工学からナノ・バイオまで」 第1編「原理編」, 第2章 物理的検出法, 第1節 一般分光法(4頁 赤外・ラマン)

    尾崎 幸洋, 佐藤 春実

    共著, エヌ・ティー・エヌ, 2004年12月, 日本語

    学術書

講演・口頭発表等

  • 振動分光法を用いた PVA/PMMA ブレンドの分子間相互作 用に関する研究

    三谷 恵里加, 佐藤 春実

    第70回高分子学会年次大会(オンライン開催), 2021年05月27日, 日本語

    ポスター発表

  • 赤外分光法及び量子化学計算によるポリブチレンサクシネ ートの分子間水素結合の検討

    伊藤 光平, 佐藤 春実

    第70回高分子学会年次大会(オンライン開催), 2021年05月26日, 日本語

    ポスター発表

  • 低波数ラマン分光法を用いたスチレンアクリロニトリル共重 合体の熱挙動に関する研究

    山本 大将, 佐藤 春実

    第70回高分子学会年次大会(オンライン開催), 2021年05月26日, 日本語

    ポスター発表

  • 赤外、ラマン、近赤外、低波数分光、遠紫外分光による水の研究

    尾崎幸洋, 那須達郎, 佐藤春実, 上野那美, 井廻睦美, 森澤勇介, 石垣美歌, 石川大太郎, 池羽田晶文

    医用分光学研究会 第18回年会(オンライン開催; 島根大担当), 2020年11月26日, 日本語

    口頭発表(基調)

  • テラヘルツおよび低波数ラマン分光法による PGAPLA 共重合体の組成比変化に伴う高次構造の研究

    西前 篤志, 佐藤 春実

    第69回 高分子討論会(オンライン開催;岩手大学担当), 2020年09月16日, 日本語

    口頭発表(一般)

  • ラマン及び赤外スペクトルに現れる水と高吸水性樹脂中の水の振動モードの比較

    那須 達郎, 佐藤 春実, 尾崎 幸洋

    第69回 高分子討論会(オンライン開催;岩手大学担当), 2020年09月16日, 日本語

    口頭発表(一般)

  • 振動分光法を用いたεポリ(L)リジンの吸水による高次構造の研究

    能智 真央, 佐藤 春実

    第69回 高分子討論会(オンライン開催;岩手大学担当), 2020年09月16日, 日本語

    口頭発表(一般)

  • 低波数領域の振動分光法を用いたεポリ(L)リジンの高次構造の研究

    能智真央, 佐藤春実

    第66回高分子研究発表会, 2020年07月10日, 日本語

  • ポリ(グリコリド-ラクチド)共重合体の低波数領域における振動モードの組成比依存性

    西前篤志, 佐藤春実

    第66回高分子研究発表会, 2020年07月10日, 日本語

  • 高吸水性樹脂中の水の振動モードの低波数領域と高波数領域の比較

    那須達郎, 佐藤春実, 尾崎幸洋

    第66回高分子研究発表会, 2020年07月10日, 日本語

  • 生分解性ポリマーブレンドのテラヘルツイメージングによるモルフォロジー観察

    吉江大成, 佐藤春実

    第66回高分子研究発表会, 2020年07月10日, 日本語

  • 低波数ラマン分光法と赤外分光法によるアクリル酸系高吸水性樹脂中の水の構造

    那須達郎, 佐藤春実, 尾崎幸洋

    第69回高分子学会年次大会, 2020年05月28日, 日本語

    ポスター発表

  • THz イメージングによるポリヒドロキシブタン酸/ポリ乳酸ブ レンドの相分離

    吉江大成, 佐藤春実

    第69回高分子学会年次大会, 2020年05月27日, 日本語

    ポスター発表

  • Intermolecular hydrogen boinding of polymer by terahertz and low-frequency Raman spectroscopy

    Harumi Sato

    The 8th International Workshop on Far-Infrared Technologies (IW-FIRT 2021) (Online Conference), 2021年03月09日, 英語

    [招待有り]

    口頭発表(招待・特別)

  • THz分光法による高分子共重合体の高次構造の研究

    西前篤志, 佐藤春実

    若手フロンティア研究会2019(神戸大学), 2019年12月19日, 日本語

    ポスター発表

  • テラヘルツ分光法を用いたポリジオキサノンの結晶相転移に関する研究

    岡崎なつ実, 佐藤春実

    若手フロンティア研究会2019(神戸大学), 2019年12月19日, 日本語

    ポスター発表

  • テラヘルツ分光法によるエンジニアリングポリエステルのメチレン鎖の長さによる結晶化の研究

    山元優美子, 佐藤春実

    若手フロンティア研究会2019(神戸大学), 2019年12月19日, 日本語

    ポスター発表

  • 低波数ラマン分光法を用いた高吸水性樹脂の水との相互作用

    那須達郎, 佐藤春実

    若手フロンティア研究会2019(神戸大学), 2019年12月19日, 日本語

    ポスター発表

  • 第四級オニウム塩ハイドレートにおける低波数ラマン分光分析

    三輪泰大, 嶋田仁, 長濱朋輝, 佐藤春実, 竹家啓, 谷篤史

    若手フロンティア研究会2019(神戸大学), 2019年12月19日, 日本語

    ポスター発表

  • テラヘルツ波を利用したPETとPBTの分子間相互作用の直接観察

    山元優美子, 佐藤春実

    第28回ポリマー材料フォーラム, 2019年11月22日, 日本語

    ポスター発表

  • トリブチルアルキルホスホニウムカチオンを内包したセミクラスレートハイドレートの物理化学特性

    嶋田仁, 三輪泰大, 嶋田大海, 菅原武, 綱島克彦, 佐藤春実, 谷篤史

    第10回イオン液体討論会, 2019年11月21日, 日本語

    ポスター発表

  • 低波数Raman分光法によるTBA/TBPハイドレートにおけるゲスト分子相互作用が与える影響の評価

    三輪泰大, 嶋田仁, 長濱朋輝, 佐藤春実, 竹家啓, 谷篤史

    第10回イオン液体討論会, 2019年11月21日, 日本語

    口頭発表(一般)

  • テラヘルツ分光を利用した高分子材料の物性評価

    佐藤春実

    学振182委員会 第3期第4回研究会, 2019年10月17日, 日本語

    [招待有り]

    口頭発表(招待・特別)

  • テラヘルツ分光法を用いたポリジオキサノンの分子間相互作用と結晶化挙動の研究

    岡崎なつ実, 佐藤春実

    第68回高分子学会討論会, 2019年09月27日, 日本語

    口頭発表(一般)

  • テラヘルツ分光法、低波数ラマン分光法、量子化学計算によるPETおよびPBTの高次構造解析

    山元優美子, 保科宏道, 佐藤春実

    第68回高分子学会討論会, 2019年09月27日, 日本語

    口頭発表(一般)

  • 赤外分光法及びテラヘルツラマン分光法によるεポリ(L)リ ジンの高次構造の研究

    能智真央, 佐藤春実

    第68回高分子学会討論会, 2019年09月26日, 日本語

    ポスター発表

  • テラヘルツおよび低波数ラマン分光法を用いたポリ(グリコ リド-co-ラクチド)共重合体の高次構造の研究

    西前篤志, 佐藤春実

    第68回高分子学会討論会, 2019年09月26日, 日本語

    ポスター発表

  • Study on The Higher-Order Structure and Hydrogen Bonding of Biodegradable Polymer by Low-Frequency Vibrational Spectroscopy

    Dian Marlina, Harumi Sato

    The 7th International Conference on DV-Xα Method (ICDM), 2019年09月03日, 英語

    [招待有り]

    口頭発表(招待・特別)

  • Week Hydrogen Bonding of Polymers Studied by Terahertz and Low-frequency Raman Spectroscopy

    Harumi Sato

    The 7th International Conference on DV-Xα Method (ICDM), 2019年09月02日, 英語

    [招待有り]

    口頭発表(招待・特別)

  • The study of crystalline phase transition in PHB/PVPh blends using Far-IR, Raman, WAXD and 2D correlation analysis

    Harumi Sato, Dian Marlina, Yeonju Park, Hiromichi Hoshina, Yukihiro Ozaki

    The The 10th International Symposium on Two-dimensional Correlation Spectroscopy (2DCOS-10), 2019年08月20日, 英語

    [招待有り]

    口頭発表(招待・特別)

  • Low-Frequency Vibrational Modes of Nylon 6 Studied by Using Far-Infrared, Raman and 2D Correlation Spectroscopies

    Yukihiro Ozaki, Yeonju Park, Harumi Sato, Young Mee Jung

    The The 10th International Symposium on Two-dimensional Correlation Spectroscopy (2DCOS-10), 2019年08月20日, 英語

    [招待有り]

    口頭発表(招待・特別)

  • TBA/TBP bromide ハイドレートのゲスト分子相互作用の差異

    三輪泰大, 嶋田仁, 長濱朋輝, 佐藤春実, 谷篤史, 竹家啓

    第28回日本エネルギー学会, 2019年08月08日, 日本語

    口頭発表(一般)

  • 低波数ラマン分光法による高吸水性ポリマーの水との相互作用

    那須達郎, 佐藤春実

    第13回近畿支部夏季セミナー ~ぶんせき秘帖 巻ノ拾参~, 2019年08月01日, 日本語

    ポスター発表

  • 振動分光法による分子量の異なるポリヒドロキシブタン酸共重合体の結晶化挙動

    松本優奈, 佐藤春実

    第13回近畿支部夏季セミナー ~ぶんせき秘帖 巻ノ拾参~, 2019年08月01日, 日本語

    ポスター発表

  • テラヘルツ領域におけるεポリ(L)リジンの高次構造に関する研究

    能智真央, 佐藤春実

    第65回高分子研究発表会(神戸), 2019年07月12日, 日本語

    ポスター発表

  • The investigation of Higher-Order Structure on Polymer Blend Poly(3-hydroxybutyrate)/Poly(4-vinylphenol)by Terahertz and Low-Frequency Raman Spectroscopy

    Dian Marlina, Harumi Sato

    第65回高分子研究発表会(神戸), 2019年07月12日, 英語

    口頭発表(一般)

  • 振動分光法によるポリヒドロキシブタン酸共重合体の結晶化速度の分子量依存性に関する研究

    松本優奈, 佐藤春実

    第65回高分子研究発表会(神戸), 2019年07月12日, 日本語

    ポスター発表

  • Week Hydrogen Bonding of Biodegradable Polyester Studied by Terahertz Spectroscopy

    Harumi Sato

    10th International Conference on Advanced Vibrational Spectroscopy (ICAVS 10), 2019年07月11日, 英語

    [招待有り]

    口頭発表(招待・特別)

  • A Study on Correlation between Intermolecular Interaction and UV Degradation of Polydioxanone by Terahertz Spectroscopy

    Natsumi Okazaki, Harumi Sato

    2019年07月09日, 英語

    ポスター発表

  • Study of higher order structure of poly(glycolide-co-lactide) by THz and low frequency Raman spectroscopy

    Atsushi Nishimae, Harumi Sato

    10th International Conference on Advanced Vibrational Spectroscopy (ICAVS 10), 2019年07月09日, 英語

    ポスター発表

  • Studey on hydration of super absorbent polymer by lowfrequency Raman spectroscopy

    Tatsuro Nasu, Harumi Sato

    10th International Conference on Advanced Vibrational Spectroscopy (ICAVS 10), 2019年07月09日, 英語

    ポスター発表

  • A study of hydrogen bondings of PET and PBT by terahertz spectroscopy and quantum chemical calculations

    Yumiko Yamamoto, Hiromichi Hoshina, Harumi, Sato

    10th International Conference on Advanced Vibrational Spectroscopy (ICAVS 10), 2019年07月09日, 英語

    ポスター発表

  • 低波数ラマン分光法を用いた高吸水性樹脂の水和に関する研究

    那須 達郎, 佐藤 春実

    第68回高分子学会年次大会, 2019年05月, 日本語, 大阪府立国際会議場, 国内会議

    ポスター発表

  • 振動分光法によるポリヒドロキシブタン酸共重合体の分子量依存性に関する研究

    松本 優奈, 佐藤 春実

    第68回高分子学会年次大会, 2019年05月, 日本語, 大阪府立国際会議場, 国内会議

    ポスター発表

  • ポリ(グリコリド-co-ラクチド)共重合体のテラヘルツ分光法による高次構造の研究

    西前 篤志, 佐藤 春実

    第68回高分子学会年次大会, 2019年05月, 日本語, 大阪府立国際会議場, 国内会議

    ポスター発表

  • テラヘルツ分光法および低波数ラマン分光法によるポリエチレンテレフタレート及びポリブチレンテレフタレートの分子間相互作用と高次構造の研究

    山元優美子, 保科宏道, 佐藤春実

    第68回高分子学会年次大会, 2019年05月, 日本語, 大阪府立国際会議場, 国内会議

    ポスター発表

  • テラヘルツ及びテラヘルツラマン分光法を用いたεポリ(L)リジンの高次構造の研究

    能智 真央, 佐藤 春実

    第68回高分子学会年次大会, 2019年05月, 日本語, 大阪府立国際会議場, 国内会議

    ポスター発表

  • The investigation of Higher-Order Structure on Polymer Blend Poly(3-hydroxybutyrate)/Poly(4-vinylphenol) by Terahertz and Low-Frequency Raman Spectroscopy

    Dian Marlina, Harumi Sato

    第68回高分子学会年次大会, 2019年05月, 英語, 大阪府立国際会議場, 国内会議

    口頭発表(一般)

  • テラヘルツ光源による高分子モルフォロジー観察

    佐藤 春実

    レーザー学会 第39回年次大会, 2019年01月, 日本語, 東海大学, 国内会議

    [招待有り]

    口頭発表(招待・特別)

  • 低波数ラマンを用いた高吸水性樹脂の水和に関する研究

    那須 達郎, 佐藤 春実

    テラヘルツ科学の最先端Ⅴ, 2018年12月, 日本語, 国内会議

    ポスター発表

  • ポリ(グリコリド-co-ラクチド)共重合体のTHz分光法による高次構造の研究

    西前 篤志, 佐藤 春実

    テラヘルツ科学の最先端Ⅴ, 2018年12月, 日本語, 千葉大学 けやき会館, 国内会議

    ポスター発表

  • テラヘルツ分光法および低波数ラマン分光法を用いた結晶性エンジニアリングプラスチックの相互作用の研究

    山元 優美子, 保科 宏道, 佐藤 春実

    テラヘルツ科学の最先端Ⅴ, 2018年12月, 日本語, 千葉大学 けやき会館, 国内会議

    ポスター発表

  • テラヘルツ分光の高分子材料への応用

    佐藤 春実

    IEEE MTT-S Kansai Chapterテクニカルワークショップ, 2018年12月, 日本語, 京都工芸繊維大学, 国内会議

    [招待有り]

    口頭発表(招待・特別)

  • Study of Tetrabutylammonium Bromide Hydrate by Two spectroscopies in THz region

    Yasuhiro Miwa, Tomoki Nagahama, Keisuke Matsumura, Harumi Sato, Kei Takeya, Atsushi Tani

    The 3rd Aquaphotomics International Symposium, 2018年12月, 英語, 淡路夢舞台, 国際会議

    ポスター発表

  • Polymer structure in water studied by THz-Raman spectroscopy

    Harumi Sato

    The 3rd Aquaphotomics International Symposium, 2018年12月, 英語, 淡路夢舞台, 国際会議

    [招待有り]

    口頭発表(招待・特別)

  • Molecular dependence of collagen model peptide stuidied by low frequency Raman spectroscopy

    Tomoki Nagahama, Mitsuru Yasuda, Yukihiro Ozaki, Harumi Sato

    The 3rd Aquaphotomics International Symposium, 2018年12月, 英語, 淡路夢舞台, 国際会議

    ポスター発表

  • Hydrogen-Bonding Interactions of Poly(3-hydroxybutyrate) / Poly(4-vinylphenol) Studied by Low Frequency-Raman Spectroscopy

    Dian Marlina, Harumi Sato

    テラヘルツ科学の最先端Ⅴ, 2018年12月, 日本語, 千葉大学 けやき会館, 国内会議

    ポスター発表

  • Structure and Physical Properties of Polymers Studied by Spectroscopy

    Harumi Sato

    International Conference on Education and Social Science Research (ICESRE), 2018年10月, 英語, Harris Hotel Semarang, Indonesia, 国際会議

    口頭発表(基調)

  • International Collaboration and University-High School Collaboration

    Harumi Sato

    International Conference on Community Service Programme 2018 (ICCSP), 2018年10月, 英語, Harris Hotel Semarang, Indonesia,, 国際会議

    口頭発表(基調)

  • 赤外分光法及び低波数ラマン分光法におけるコラーゲンモデル化合物の分子量依存性

    長濱朋輝, 佐藤 春実

    第67回高分子討論会, 2018年09月, 日本語, 北海道大学, 国内会議

    ポスター発表

  • テラヘルツ分光法による高分子の分子間相互作用の観測と物性評価への応用

    佐藤春実, 舟木千尋, 辰岡星佳

    第67回高分子討論会, 2018年09月, 日本語, 北海道大学, 国内会議

    ポスター発表

  • テラヘルツ分光法によるポリブチレンテレフタレートの高次構造と結晶構造形成過程の研究

    山元優美子, 保科宏道, 佐藤 春実

    第67回高分子討論会, 2018年09月, 日本語, 北海道大学, 国内会議

    ポスター発表

  • テラヘルツ分光法によるポリジオキサノンの結晶構造における相互作用の解明

    岡崎なつ実, 保科宏道, 佐藤 春実

    第67回高分子討論会, 2018年09月, 日本語, 北海道大学, 国内会議

    ポスター発表

  • A Study of Hydrogen Bonding of Polyethylere Glycol / Chitosan Blends in the Low-frequency Region

    Dian Marlina, Harumi Sato

    第67回高分子討論会, 2018年09月, 英語, 北海道大学, 国内会議

    ポスター発表

  • The Study of Intermolecular Interaction in Polymer Blend of Polyethylene Glycol and Cellulose Acetate Butyrate by Low-Frequency Raman Spectroscopy

    Marlina Dian, Harumi Sato

    the 26th International Conference on Raman Spectroscopy, 2018年08月, 英語, Jeju Island, Korea, 国際会議

    ポスター発表

  • Study on Intermolecular Interaction of Polydioxanone by Terahertz and low frequency Raman spectroscopy

    Natsumi Okazaki, Harumi Sato

    he 26th International Conference on Raman Spectroscopy, 2018年08月, 英語, Jeju Island, Korea, 国際会議

    ポスター発表

  • Study of higher order structure of poly (ethylene terephthalate) and poly (butylene terephthalate) by low frequency Raman and terahertz spectoscopy

    Yumiko Yamamoto, Harumi Sato

    the 26th International Conference on Raman Spectroscopy, 2018年08月, 英語, Jeju Island, Korea, 国際会議

    ポスター発表

  • Stress-induced crystal transition of poly(butylenesuccinate) studied by terahertz and low-frequency Raman spectroscopy

    Harumi Sato

    the 26th International Conference on Raman Spectroscopy, 2018年08月, 英語, Jeju Island, Korea, 国際会議

    [招待有り]

    口頭発表(招待・特別)

  • Observation of THz-Raman Spectrum in Tetrabutylammonium Bromide Hydrate

    Yasuhiro Miwa, Tomoki Nagahama, Harumi Sato, Kei Takeya, Atsushi Tani

    the 26th International Conference on Raman Spectroscopy, 2018年08月, 英語, Jeju Island, Korea, 国際会議

    ポスター発表

  • Molecular dependence of several collagen model peptides stuidied by low frequency Raman spectroscopy

    Tomoki Nagahama, Harumi Sato

    the 26th International Conference on Raman Spectroscopy, 2018年08月, 英語, Jeju Island, Korea, 国際会議

    ポスター発表

  • 赤外およびテラヘルツ分光法によるポリジオキサノンの分子間相互作用に関する研究

    岡崎なつ実, 保科宏道, 佐藤 春実

    高分子研究発表会, 2018年07月, 日本語, 兵庫県民会館, 国内会議

    ポスター発表

  • 振動分光法によるポリブチレンテレフタレートの分子間・分子内相互作用の研究

    山元優美子, 保科宏道, 佐藤春実

    高分子研究発表会, 2018年07月, 英語, 兵庫県民会館, 国内会議

    ポスター発表

  • 高感度反射赤外分光法を用いたポリメタクリル酸メチルとポリ4-ビニルフェノール超薄膜の相分離挙動と分子量依存性

    長濵朋輝, 寺崎守永, 高橋功, 尾崎幸洋, 佐藤春実

    高分子研究発表会, 2018年07月, 日本語, 兵庫県民会館, 国内会議

    ポスター発表

  • Intermolecular Interaction of Polyethylene Glycol / Cellulose Acetate Butyrate Blends by Terahertz Spectroscopy

    Dian Marlina, Harumi Sato

    高分子研究発表会, 2018年07月, 英語, 兵庫県民会館, 国内会議

    ポスター発表

  • Three different kinds of weak C-H…O=C inter- and intramolecular interactions in poly(ε-caprolactone) studied by terahertz spectroscopy, infrared spectroscopy and quantum chemical calculations

    Harumi Sato, Chihiro Funaki

    ICAMS, 2018年06月, 英語, Kwansei Gakuin Kaikan, Nishinomiya, 国際会議

    ポスター発表

  • Observation of THz- Raman Spectrum in Tetrabutylammonium Bromide Hydrate

    Yasuhiro Miwa, Tomoki Nagahama, Harumi Sato, Kei Takeya, Atsushi Tani

    ICAMS, 2018年06月, 英語, Kwansei Gakuin Kaikan, Nishinomiya, 国際会議

    ポスター発表

  • Molecular weight dependence of phase separation of poly(methyl methacrylate)/poly(4-vinyl phenol) ultra-thin film studied by infrared reflection absorption spectroscopy

    Tomoki Nagahama, Morihisa Terasaki, Isao Takahashi, Yukihiro Ozaki, Harumi Sato

    ICAMS, 2018年06月, 英語, Kwansei Gakuin Kaikan, Nishinomiya, 国際会議

    ポスター発表

  • Intermolecular interaction of polydioxanone studied by terahertz spectroscopy

    Natsumi Okazaki, Harumi Sato

    ICAMS, 2018年06月, 英語, Kwansei Gakuin Kaikan, Nishinomiya, 国際会議

    ポスター発表

  • Inter- and intra-molecular interaction of PET and PBT studied by terahertz spectroscopy,

    Yumiko Yamamoto, Harumi Sato

    ICAMS, 2018年06月, 英語, Kwansei Gakuin Kaikan, Nishinomiya, 国際会議

    ポスター発表

  • Hydration Study of Polyethylene Glycol Based Polymer Blend by Low-Frequency Raman Spectroscopy

    Dian Marlina, Harumi Sato

    ICAMS, 2018年06月, 英語, Kwansei Gakuin Kaikan, Nishinomiya, 国際会議

    ポスター発表

  • 外及びテラヘルツ分光法によるポリジオキサノンの結晶構造と分子間相互作用に関する研究

    岡崎なつ実, 保科宏道, 佐藤 春実

    高分子年次大会, 2018年05月, 英語, 名古屋国際会議場, 国内会議

    ポスター発表

  • ラヘルツおよび赤外分光法によるポリブチレンテレフタレートの高次構造の研究

    山元優美子, 保科宏道, 佐藤 春実

    高分子年次大会, 2018年05月, 日本語, 名古屋国際会議場, 国内会議

    口頭発表(基調)

  • Higher-Order Structure of Polyethylene Glycol and Its Blends Studied by Terahertz Spectroscopy

    Dian Marlina, Harumi Sato

    高分子年次大会, 2018年05月, 英語, 名古屋国際会議場, 国内会議

    口頭発表(一般)

  • テラヘルツ分光を利用した高分子の高次構造

    佐藤 春実

    第4回 関西接着ワークショップ「今後の発展が期待される解析技術」, 2018年01月, 日本語, 大阪市立大学梅田サテライト 文化交流センター, 国内会議

    [招待有り]

    シンポジウム・ワークショップパネル(指名)

  • 低波数領域におけるポリブチレンサクシネート(PBS)の高次構造の研究

    辰岡星佳, 佐藤 春実, 保科宏道

    テラヘルツ科学の最先端Ⅳ, 2017年12月, 日本語, KKRホテル熱海, 国内会議

    ポスター発表

  • ポリジオキサノン(PDS)のテラヘルツ分光法による分子間相互作用に関する研究

    岡崎なつ実, 佐藤 春実

    テラヘルツ科学の最先端Ⅳ, 2017年12月, 日本語, KKRホテル熱海, 国内会議

    ポスター発表

  • ポリエチレンテレフタレート及びポリブチレンテレフタレートのTHz分光法による高次構造の研究

    山元優美子, 佐藤 春実

    テラヘルツ科学の最先端Ⅳ, 2017年12月, 日本語, KKRホテル熱海, 国内会議

    ポスター発表

  • Higher Ordered Structure of Chitosan Polyethylere Glycol Blends Studied by Terahertz Spectroscopy

    Dian Marlina, Harumi Sato

    テラヘルツ科学の最先端Ⅳ, 2017年12月, 英語, KKRホテル熱海, 国内会議

    ポスター発表

  • 低波数ラマン及びテラヘルツ分光法によるコラーゲン及びコラーゲンモデル化合物の構造変化

    長濵朋輝, 佐藤春実

    第63回高分子研究発表会, 2017年07月, 日本語, 兵庫県民会館, 国内会議

    ポスター発表

  • 高分子分光法による高分子の高次構造の研究

    佐藤 春実

    第45回東北地区高分子若手研究会夏季ゼミナール, 2017年07月, 日本語, 仙台市秋保温泉「岩沼屋」, 国内会議

    [招待有り]

    口頭発表(招待・特別)

  • テラヘルツ分光法によるポリカプロラクトンの紫外線劣化と高次構造の相関

    舟木千尋, 豊内拓哉, 保科宏道, 尾崎幸洋, 佐藤春実

    第63回高分子研究発表会, 2017年07月, 日本語, 兵庫県民会館, 国内会議

    ポスター発表

  • テラヘルツ分光法によるステレオコンプレックス型ポリ乳酸の紫外線劣化過程に関する研究

    中村萌, 佐藤春実, 保科宏道, 尾崎幸洋

    第63回高分子研究発表会, 2017年07月, 日本語, 兵庫県民会館, 国内会議

    ポスター発表

  • Thermal Denaturation and structual changes of collagen model peptide studied by low frequency Raman and THz spectroscopy

    Tomoki Nagahama, Harumi Sato

    ICAVS2017, 2017年06月, 英語, Victoria Conference Centre, 国際会議

    ポスター発表

  • Low-Frequency Vibrational Modes of Crystalline Polyesters and Interchain Interaction Studied by Using DFT Calculation

    Shigeki Yamamoto, Harumi Sato, Hiromichi Hoshina, Yukihiro Ozaki

    ICAVS2017, 2017年06月, 英語, Victoria Conference Centre, 国際会議

    ポスター発表

  • Intermolecular Interaction and Higher-Order Structure of Biodegradable Polyester Studied by Terahertz Spectroscopy

    Harumi Sato, Chihiro Funaki

    ICAVS2017, 2017年06月, 英語, Victoria Conference Centre, 国際会議

    [招待有り]

    口頭発表(招待・特別)

  • 低波数ラマン及びテラヘルツ分光法によるコラーゲン及びコラーゲンモデル化合物の構造変化

    長濱 朋輝, 佐藤 春実

    第66回高分子年次大会, 2017年05月, 日本語, 幕張メッセ, 国内会議

    ポスター発表

  • ラマン・テラヘルツ分光法を用いたステレオコンプレックス型ポリ乳酸の紫外線劣化評価

    中村 萌, 佐藤 春実, 保科 宏道, 尾崎 幸洋

    第66回高分子年次大会, 2017年05月, 日本語, 幕張メッセ, 国内会議

    ポスター発表

  • テラヘルツ分光法を用いた太陽光パネル封止材の紫外線劣化評価

    関谷 一剛, 保科 宏道, 佐藤 春実

    第66回高分子年次大会, 2017年05月, 日本語, 幕張メッセ, 国内会議

    ポスター発表

  • テラヘルツ時間領域分光法による延伸ポリ乳酸薄膜の光学異方性に関する研究

    中村円香, 岩崎穂積, 小松原望, 岡野真人, 中迫雅由, 佐藤 春実, 渡邉紳一

    第66回高分子学会年次大会, 2017年05月, 日本語, 幕張メッセ, 国内会議

    口頭発表(一般)

  • 延伸ポリ乳酸薄膜を用いたテラヘルツ1/4波長板の作製

    小松原 望, 中村 円香, 岩﨑 穂積, 岡野 真人, 佐藤 春実, 渡邉 紳一

    第64回応用物理学会春季学術講演会, 2017年03月, 日本語, パシフィコ横浜, 国内会議

    口頭発表(一般)

  • Higher-Order Structure of Biodegradable Polyesters Studied byTerahertz Spectroscopy

    佐藤 春実

    Molecular Photoscience Research Center International Symposium, 2017年03月, 英語, 神戸大学 瀧川記念会館, 国内会議

    [招待有り]

    口頭発表(招待・特別)

  • Thermal denaturation of Collagen studied by ATR-IR, low frequency Raman and THz spectroscopy

    Tomoki Nagahama, Harumi Sato

    Japan-Taiwan Medical Spectroscopy International Symposium, 2016年12月, 英語, Awaji Yumebutai International Confernce Center, 国際会議

    ポスター発表

  • Thermal and Ultraviolet Degradation of Poly(ethylene-co-vinyl acetate) Studied by Vibrational Spectroscopy

    Kazutaka Sekiya, Hiromichi Hoshina, Harumi Sato

    Japan-Taiwan Medical Spectroscopy International Symposium, 2016年12月, 英語, Awaji Yumebutai International Confernce Center, 国際会議

    ポスター発表

  • The change of higer-order structure and molecular weight dependence of poly(ethylene glycol) studied by low-frequency Raman spectroscopy

    Yoshifumi Himeno, Harumi Sato

    Japan-Taiwan Medical Spectroscopy International Symposium, 2016年12月, 英語, Awaji Yumebutai International Confernce Center, 国際会議

    ポスター発表

  • Temperature- and Ultraviolet Irradiation -Induced Structural Changes of Poly(L-lactide)/Poly(D-lactide) Stereocomplex Studied by Raman and Terahertz Spectroscopies

    Moe Nakamura, Harumi Sato, Hiromichi Hoshina, Yukihiro Ozaki

    Japan-Taiwan Medical Spectroscopy International Symposium, 2016年12月, 英語, Awaji Yumebutai International Confernce Center, 国際会議

    ポスター発表

  • Stretch-induced crystalline phase transition of poly(butylene succinate) studied by polarized terahertz spectroscopy

    Seika Tatsuoka, Yukihiro Ozaki, Hiromichi Hoshina, Harumi Sato

    Japan-Taiwan Medical Spectroscopy International Symposium, 2016年12月, 英語, Awaji Yumebutai International Confernce Center, 国際会議

    ポスター発表

  • Phase separation of poly(methyl methacrylate)/poly(4-vinyl phenol) ultra-thin film studied by infrared reflection adsorption spectroscopy

    Morihisa Terasaki, Khasanah, Isao Takahashi, Yukihiro Ozaki, Harumi Sato

    Japan-Taiwan Medical Spectroscopy International Symposium, 2016年12月, 英語, Awaji Yumebutai International Confernce Center, 国際会議

    ポスター発表

  • Molecular Weight Dependence of the Formation of Weak Hydrogen Bonding in Poly(3-hydroxybutyrate)

    Harumi Sato

    Japan-Taiwan Medical Spectroscopy International Symposium, 2016年12月, 英語, Awaji Yumebutai International Confernce Center, 国際会議

    ポスター発表

  • Higher-Order Structure of the Biodegradable Polymer Studied by Terahertz Spectroscopy

    Harumi Sato

    Japan-Taiwan Medical Spectroscopy International Symposium, 2016年12月, 英語, Awaji Yumebutai International Confernce Center, 国際会議

    [招待有り]

    口頭発表(招待・特別)

  • Evaluation of physical properties of poly(ε-caprolactone)studied by terahertz spectroscopy

    Chihiro Funaki, Takuya Toyouchi, Hiromichi Hoshina, Yukihiro Ozaki, Shigeki Yamamoto, Harumi Sato

    Japan-Taiwan Medical Spectroscopy International Symposium, 2016年12月, 英語, Awaji Yumebutai International Confernce Center, 国際会議

    ポスター発表

  • Effect of Additives on the Crystallization Behavior of Poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) Studied by Infrared Spectroscopy

    Shuhei Suzuki, Hitoshi Sashiwa, Harumi Sato

    Japan-Taiwan Medical Spectroscopy International Symposium, 2016年12月, 英語, Awaji Yumebutai International Confernce Center, 国際会議

    ポスター発表

  • Depth direction analysisof polymer materialsby low-frequency Raman

    Yuki Morio, Yasutaka Kitahama, Harumi Sato, Yukihiro Ozaki

    Japan-Taiwan Medical Spectroscopy International Symposium, 2016年12月, 英語, Awaji Yumebutai International Confernce Center, 国際会議

    ポスター発表

  • 低波数ラマンを用いたポリエチレングリコールの高次構造の変化と分子量依存性

    姫野 禎史, 佐藤 春実

    テラヘルツ科学の最先端Ⅲ, 2016年11月, 日本語, 三国観光ホテル, 国内会議

    ポスター発表

  • 延伸ポリ乳酸薄膜試料の作製とテラヘルツ偏光光学素⼦への応⽤

    小松原望, 中村円香, 岩崎穂積, 岡野真人, 佐藤 春実, 渡邉紳一

    テラヘルツ科学の最先端Ⅲ, 2016年11月, 日本語, 三国観光ホテル, 国内会議

    ポスター発表

  • ラマン・テラヘルツ分光法を⽤いたステレオコンプレックス型ポリ乳酸の構造変化に関する研究

    中村 萌, 佐藤 春実, 保科 宏道, 尾崎 幸洋

    テラヘルツ科学の最先端Ⅲ, 2016年11月, 日本語, 三国観光ホテル, 国内会議

    ポスター発表

  • テラヘルツ分光法を用いたポリグリコール酸の結晶構造形成過程

    佐藤春実, 西村文太, 豊内拓哉, 関谷一剛, 保科宏道, 尾崎幸洋

    テラヘルツ科学の最先端Ⅲ, 2016年11月, 英語, 三国観光ホテル, 国内会議

    ポスター発表

  • テラヘルツ分光法によるポリカプロラクトンの紫外線劣化評価

    舟木 千尋, 豊内 拓哉, 保科 宏道, 尾崎 幸洋, 山本 茂樹, 佐藤 春実

    テラヘルツ科学の最先端Ⅲ, 2016年11月, 日本語, 三国観光ホテル, 国内会議

    ポスター発表

  • THz領域におけるポリブチレンサクシネートの延伸誘起結晶相転移

    辰岡星佳, 保科宏道, 尾崎幸洋, 佐藤春実

    テラヘルツ科学の最先端Ⅲ, 2016年11月, 日本語, 三国観光ホテル, 国内会議

    ポスター発表

  • 高複屈折性を有する延伸ポリ乳酸膜の作製

    中村 円香, 岩崎 穂積, 小松 原望, 岡野 真人, 森脇 淳仁, 佐藤 春実, 渡邉 紳一

    応用物理学会春季学術講演会, 2016年09月, 日本語, 朱鷺メッセ:新潟コンベンションセンター, 国内会議

    口頭発表(一般)

  • ラマン・テラヘルツ分光法によるポリ乳酸及びステレオコンプレックス型ポリ乳酸の紫外線劣化と分子量依存性の研究

    中村 萌, 佐藤 春実, 保科 宏道, 尾崎 幸洋

    日本分析化学会第65年会, 2016年09月, 日本語, 北海道大学, 国内会議

    口頭発表(一般)

  • テラヘルツ分光法を用いた太陽光パネル封止材ポリエチレン-ポリ酢酸ビニル共重合体の劣化評価

    関谷 一剛, 保科 宏道, 佐藤 春実

    第65回高分子討論会, 2016年09月, 日本語, 神奈川大学 横浜キャンパス, 国内会議

    ポスター発表

  • テラヘルツ分光法による高分子ポリ乳酸の光学異方性の研究

    岩﨑 穂積, 岡野 真人, 小松 原望, 中村 円香, 森脇 淳仁, 佐藤 春実, 渡邉 紳一

    日本物理学会, 2016年09月, 日本語, 金沢大学, 国内会議

    ポスター発表

  • テラヘルツ分光法によるポリ(ε-カプロラックトン)の結晶構造における相互作用の解明

    豊内 拓哉, 佐藤 春実, 保科 宏道

    第65回高分子討論会, 2016年09月, 日本語, 神奈川大学 横浜キャンパス, 国内会議

    口頭発表(一般)

  • THz and low-frequency Raman Spectroscopy of polymers

    Harumi Sato

    ESOPS20, 2016年09月, 英語, Dresden, 国際会議

    [招待有り]

    口頭発表(招待・特別)

  • Stretch-induced crystalline phase transition of poly(butylene succinate) by Terahertz spectroscopy

    Seika Tatsuoka, Yukihiro Ozaki, Hiromichi Hoshina, Harumi Sato

    ESOPS20, 2016年09月, 英語, Dresden, 国際会議

    ポスター発表

  • Effect of additives on the crystallization behavior of poly(hydroxybutyrate-co-hydroxyhexanoate)

    Syuhei Suzuki, Hitoshi Sashiwa, Harumi Sato

    ESOPS20, 2016年09月, 英語, Dresden, 国際会議

    ポスター発表

  • Characterization of poly (ε-caprolactone)by using terahertz imaging

    Chihiro Funaki, Takuya Toyouchi, Hiromichi Hoshina, Yukihiro Ozaki, Harumi Sato

    ESOPS20, 2016年09月, 英語, Dresden, 国際会議

    ポスター発表

  • Birefringent properties of poly-lactic acid at terahertz range

    Hotsumi Iwasaki, Makoto Okano, Nozomu Komatsubara, Madoka Nakamura, Atsuto Moriwaki, Harumi Sato, Shinichi Watanabe

    IRMMW2016, 2016年09月, 英語, Copenhagen, Denmark -Bella Centar, 国際会議

    ポスター発表

  • ポリヒドロキシブタン酸共重合体の核剤添加による結晶化挙動

    鈴木 修平, 佐藤 春実, 指輪 仁之

    第62回高分子研究発表会, 2016年07月, 日本語, 兵庫県民会館, 国内会議

    ポスター発表

  • テラヘルツ分光法を用いたポリブチレンサクシネートの結晶相転移

    辰岡 星佳, 保科 宏道, 尾崎 幸洋, 佐藤 春実

    第62回高分子研究発表会, 2016年07月, 日本語, 兵庫県民会館, 国内会議

    ポスター発表

  • テラヘルツイメージングによるポリカプロラクトン(PCL)の物性評価

    舟木 千尋, 豊内 拓哉, 保科 宏道, 尾崎 幸洋, 佐藤 春実

    第62回高分子研究発表会, 2016年07月, 日本語, 兵庫県民会館, 国内会議

    ポスター発表

  • 量子力学計算によるポリグリコール酸の低波数振動の帰属

    山本 茂樹, 宮田 真衣, 佐藤 春実, 保科 宏道, 尾崎 幸洋

    日本分光学会年次講演会, 2016年05月, 日本語, 大阪大学 豊中キャンパス 基礎工学部 Σホール, 国内会議

    口頭発表(一般)

  • 振動分光法を用いたポリブチレンサクシネートの延伸による結晶相転移の研究

    辰岡 星佳, 保科 宏道, 尾崎 幸洋, 佐藤 春実

    第65回高分子学会年次大会, 2016年05月, 日本語, 神戸国際会議場, 国際会議

    ポスター発表

  • 振動分光法および小角/広角X線散乱法による低分子量ポリヒドロキシブタン酸の結晶構造形成過程の研究

    門屋 直人, 宮井 智也, 佐藤 春実

    第65回高分子学会年次大会, 2016年05月, 日本語, 神戸国際会議場, 国内会議

    ポスター発表

  • 高感度反射赤外分光法を用いた超薄膜状態におけるポリメタクリル酸メチルとポリ4-ビニルフェノールの相分離

    寺崎 守永, Khasanah, 尾崎幸洋, 佐藤 春実

    第65回高分子学会年次大会, 2016年05月, 日本語, 神戸国際会議場, 国内会議

    ポスター発表

  • ラマン・テラヘルツ分光を用いたポリ乳酸およびステレオコンプレックス型ポリ乳酸の分子間相互作用と結晶構造形成過程の研究

    中村 萌, 佐藤 春実, 山本 茂樹, 保科 宏道, 尾崎 幸洋

    第65回高分子学会年次大会, 2016年05月, 日本語, 神戸国際会議場, 国内会議

    ポスター発表

  • ポリヒドロキシブタン酸共重合体の結晶化挙動に及ぼす添加剤の影響

    鈴木 修平, 佐藤 春実, 指輪 仁之

    第65回高分子学会年次大会, 2016年05月, 日本語, 神戸国際会議場, 国内会議

    ポスター発表

  • テラヘルツ分光法を用いたポリ(ε-カプロラクトン)の結晶構造と熱挙動

    豊内 拓哉, 保科 宏道, 佐藤 春実

    第65回高分子学会年次大会, 2016年05月, 日本語, 神戸国際会議場, 国内会議

    ポスター発表

  • テラヘルツ分光法による高分子材料の劣化評価

    佐藤 春実

    テラヘルツテクノロジーフォーラム第14回講演会, 2016年05月, 日本語, 大阪大学 医学・工学研究科 東京ブランチ, 国内会議

    [招待有り]

    口頭発表(招待・特別)

  • テラヘルツイメージングによるポリカプロラクトン(PCL)の物性評価

    舟木 千尋, 豊内 拓哉, 保科 宏道, 尾崎 幸洋, 佐藤 春実

    第65回高分子学会年次大会, 2016年05月, 日本語, 神戸国際会議場, 国内会議

    ポスター発表

  • The evolution of intermediate and highly-ordered crystalline states under spatial confinement in poly(3-hydroxybutyrate) ultrathin films

    Khasanah, Kummetha Raghunatha Reddy, Shigesaburo Ogawa, Isao Takahashi, Harumi Sato, Yukihiro Ozaki

    第65回高分子学会年次大会, 2016年05月, 英語, 神戸国際会議場, 国内会議

    口頭発表(一般)

  • Low-frequency vibrational modes and intermolecular interaction of Nylon 6 studied by Raman, far-IR, and Terahertz Spectroscopies with Quantum Chemical Calculation

    Yukihiro Ozaki, Erika Onishi, Shigeki Yamamoto, Harumi Sato, Daitaro Ishikawa, Hiromichi Hoshina

    Pacifichem2015, 2015年12月, 英語, Hawaii Convention Center, 国際会議

    口頭発表(一般)

  • Isothermal crystallization of poly glycolic acid (PGA) by terahertz and Infrared spectroscopy

    Fumita Nishimura, Yukihiro Ozaki, Hiromichi Hoshina, Harumi Sato

    Pacifichem2015, 2015年12月, 英語, Hawaii Convention Center, 国際会議

    ポスター発表

  • Hydrogen bondings and stereocomplex formation of poly (L-lactic acid) and its poly (D-lactic acid) during isothermal crystallization studied by Raman spectroscopy and X-ray diffraction

    Harumi Sato, Yoshinori Narihisa, Daiki Furukawa, Yukihiro Ozaki

    Pacifichem2015, 2015年12月, 英語, Hawaii Convention Center, 国際会議

    ポスター発表

  • Crystal structure and thermal behavior of low molecular weight poly (3-hydroxybutyrate) studied by terahertz and Raman spectroscopy

    Tomoya Miyai, Naoto Kadoya, Hiromichi Hoshina, Yukihiro Ozaki, Harumi Sato

    Pacifichem2015, 2015年12月, 英語, Hawaii Convention Center, 国際会議

    口頭発表(一般)

  • Crystallization and Thermal Behavior of Polly (ε-caprolactone) and its Copolymers Studied by Vibrational Spectroscopy,

    Takuya Toyouchi, Harumi Sato, Yukihiro Ozaki

    Pacifichem2015, 2015年12月, 英語, Hawaii Convention Center, 国際会議

    ポスター発表

  • Crystallization and chain orientation in the ultrathin films of poly (3-hydroxybutyrate) studied by IR-RAS and GIXD

    Khasanah, Raghunatha Reddy Kummetha, Isao Takahashi, Harumi Sato, Yukihiro Ozaki

    Pacifichem2015, 2015年12月, 英語, Hawaii Convention Center, 国際会議

    ポスター発表

  • ラマン分光法とテラヘルツ分光法を用いたPBS(ポリブチレンサクシネート)の結晶相転移

    辰岡 星佳, 佐藤 春実, 保科 宏道

    シンポジウム テラヘルツ科学の最先端Ⅱ, 2015年11月, 日本語, 作並温泉, 国内会議

    ポスター発表

  • ラマン、テラヘルツ分光によるポリ乳酸とステレオコンプレックス化したポリ乳酸の構造変化に関する研究

    中村 萌, 佐藤 春実, 保科 宏道, 尾崎 幸洋

    シンポジウム テラヘルツ 科学の最先端Ⅱ, 2015年11月, 日本語, 作並温泉, 国内会議

    ポスター発表

  • テラヘルツ分光法を用いた生分解性ポリエステルのUV照射による劣化評価

    佐藤 春実, 西村 文太, 豊内 拓哉, 関谷 一剛, 保科 宏道

    シンポジウム 科学の最先端Ⅱ, 2015年11月, 日本語, 作並温泉, 国内会議

    ポスター発表

  • THzイメージングによる生分解性高分子の物性評価

    舟木 千尋, 西村 文太, 佐藤 春実, 保科 宏道

    シンポジウム テラヘルツ科学の最先端Ⅱ, 2015年11月, 日本語, 作並温泉, 国内会議

    ポスター発表

  • Intermolecular Interaction of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)Studied by Low-Frequency Raman and Terahertz Spectroscopy

    Dian Marlina, Hiromichi Hoshina, Harumi Sato, Yukihiro Ozaki

    シンポジウム テラヘルツ科学の最先端Ⅱ, 2015年11月, 英語, 作並温泉, 国内会議

    ポスター発表

  • Application of FUV spectroscopy for polyethylene Structure analysis

    Kazuya Ono, Atsushi Nakayama, Yukihiro Ozaki, Harumi Sato, Erika Tanimura, Yusuke Morisawa

    成形加工シンポジア’15, 2015年11月, 英語, 福岡大学, 国内会議

    口頭発表(一般)

  • 振動分光法を用いた低分子量ポリ(3-ヒドロキシブタン酸)の結晶構造及び熱的挙動に関する研究

    宮井 智也, 門屋 直人, 保科 宏道, 尾崎 幸洋, 佐藤 春実

    第64回高分子討論会, 2015年09月, 日本語, 東北大学 川内キャンパス, 国内会議

    ポスター発表

  • ラマン分光法を用いたポリブチレンサクシネートの結晶構造の違いによる酵素分解挙動

    筒井 綾香, 佐藤 春実

    第64回高分子討論会, 2015年09月, 日本語, 東北大学 川内キャンパス, 国内会議

    ポスター発表

  • ラマン分光法およびテラヘルツ分光法を用いたポリエチレングリコール(PEG)の 劣化に関する研究

    関谷 一剛, 保科 宏道, 佐藤 春実

    第64回高分子討論会, 2015年09月, 日本語, 東北大学 川内キャンパス, 国内会議

    ポスター発表

  • テラヘルツ分光法および赤外分光法を用いたポリ(ε-カプロラクトン)の結晶化挙動および熱挙動

    豊内 拓哉, 保科 宏道, 佐藤 春実

    第64回高分子討論会, 2015年09月, 日本語, 東北大学 川内キャンパス, 国内会議

    ポスター発表

  • テラヘルツ分光法およびX線回折法を用いたポリグリコール酸(PGA)の結晶化過程に関する研究

    西村 文太, 保科 宏道, 佐藤 春実

    第64回高分子討論会, 2015年09月, 日本語, 東北大学 川内キャンパス, 国内会議

    口頭発表(一般)

  • テラヘルツ分光による新しい高分子研究の可能性

    保科 宏道, 鈴木 晴, 大谷 知行, 山本 茂, 西村 文太, 佐藤 春実, 尾崎 幸洋

    第64回高分子討論会, 2015年09月, 日本語, 東北大学 川内キャンパス, 国内会議

    口頭発表(一般)

  • チップ増強ラマン散乱法を用いたポリマーナノコンポジットのナノ構造と分子間相互作用に関する研究

    尾崎 幸洋, ヤン シンレイ, 佐藤 春実

    第64回高分子討論会, 2015年09月, 日本語, 東北大学 川内キャンパス, 国内会議

    口頭発表(一般)

  • Thermal Behavior and Lamella Structures of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Studied by Low-Frequency Raman,Terahertz Spectroscopy, and Small Angle X-ray Scattering

    Dian Marlina, Mengfan Wan, Koh Yoshida, Hiromichi Hoshina, Harumi Sato, Yukihiro Ozaki

    SCIX2015, 2015年09月, 英語, Rhode Island Convention Center, 国際会議

    口頭発表(一般)

  • The crystallization behavior of poly(3-hydroxybutyrate)(PHB) during solvent casting process

    Mengfan Wang, Shigeaki Morita, Harumi Sato, Yukihiro Ozaki

    第64回高分子討論会, 2015年09月, 英語, 東北大学 川内キャンパス, 国内会議

    ポスター発表

  • Temperature Dependent of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Studied by Low Frequency Raman and Terahertz Spectroscopy

    Dian Marlina, Koh Yoshida, Hiromichi Hoshina, Harumi Sato, Yukihiro Ozaki

    第64回高分子討論会, 2015年09月, 英語, 東北大学 川内キャンパス, 国内会議

    ポスター発表

  • Study on the Crystallization behavior, Intermediate Phase and Conformation Rearrangement of Poly(3-hydroxybutyrate) Ultrathin Film by Using IR-RAS and GIXD

    Khasanah, Kummetha Raghunatha Reddy, Harumi Sato, Isao Takahashi, Yukihiro Ozaki

    第64回高分子討論会, 2015年09月, 英語, 東北大学 川内キャンパス, 国内会議

    口頭発表(一般)

  • Studies of Electronic States of CNT/Rubber Nanocomposites by using Attenuated Total Reflectance Spectroscopy in the Ultraviolet Region;

    Yusuke Morisawa, Kenta Kobashi, Ichiro Tanabe, Harumi Sato, Takeyoshi Goto, Yukihiro Ozaki

    SCIX2015, 2015年09月, 英語, Rhode Island Convention Center, 国際会議

    ポスター発表

  • Investigation of Electronic States of Nano Carbon/Polymer Nanocomposites by Attenuated Total Reflectance-Ultraviolet Spectroscopy

    Kenta Kobashi, Ichiro Tanabe, Yusuke Morisawa, Harumi Sato, Takeyoshi Goto, Yukihiro Ozaki

    SCIX2015, 2015年09月, 英語, Rhode Island Convention Center, 国際会議

    ポスター発表

  • 低分子量ポリ(3-ヒドロキシブタン酸)における結晶構造及び熱的挙動のラマン分光法及びテラヘルツ分光法を用いた研究

    宮井 智也, 門屋 直人, 保科 宏道, 尾崎 幸洋, 佐藤 春実

    第61回高分子研究発表会, 2015年07月, 日本語, 兵庫県民会館, 国内会議

    ポスター発表

  • 振動分光法を用いたポリカプロラクトンとその共重合体の結晶化挙動に関する研究

    豊内 拓哉, 尾崎 幸洋, 佐藤 春実

    第61回高分子研究発表会, 2015年07月, 日本語, 兵庫県民会館, 国内会議

    ポスター発表

  • 近赤外分光イメージングを用いたポリ乳酸の紫外線劣化による深さ方向分析

    土原 翔吾, 佐藤 春実, 成久 吉紀, 尾崎 幸洋

    第61回高分子研究発表会, 2015年07月, 日本語, 兵庫県民会館, 国内会議

    口頭発表(一般)

  • Structure and crystallization behavior of Poly (3-hydroxybutyrate) and Poly (D, L-lactide) blends studied by DSC, FTIR and X-ray analysis

    Mengfan Wang, Harumi Sato, Yukihiro Ozaki

    第61回高分子研究発表会, 2015年07月, 英語, 兵庫県民会館, 国内会議

    ポスター発表

  • Crystallization Behavior and Conformation Rearrangement of Poly(3-hydroxybutyrate) Ultrathin Film Investigated by Infrared Reflection Absorption Spectroscopy

    Khasanah, Kummetha Raghunatha Reddy, Isao Takahashi, Harumi Sato, Yukihiro Ozaki

    第61回高分子研究発表会, 2015年07月, 英語, 兵庫県民会館, 国内会議

    口頭発表(一般)

  • Analysis of Intermolecular Vibration Mode of Poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (P(HB-co-HV)) using Low Frequency Raman and Terahertz Spectroscopy

    Daian Marlina, Sato Harumi, Ozaki Yukihiro

    第61回高分子研究発表会, 2015年07月, 英語, 兵庫県民会館, 国内会議

    ポスター発表

  • 生分解性ポリエステルにおける溶融押出混練時の残存結晶量による結晶化促進効果

    青山 泰三, 佐藤 春実, 尾崎 幸洋

    プラスチック成形加工学会 第26回年次大会, 2015年06月, 日本語, タワーホール長堀, 国内会議

    口頭発表(一般)

  • Multistep Crystallization Process of Poly(3-hydroxybutyrate) Studied by Time-Resolved Synchrotron SAXS and WAXD and MCR

    Harumi Sato

    XV Chemometrics in Analytical Chemistry, 2015年06月, 英語, Changsha,China, 国際会議

    [招待有り]

    口頭発表(招待・特別)

  • 赤外分光法、広角小角X線回折を用いた低分子量ポリ-3-ヒドロキシブタン酸(PHB)の等温結晶化プロセスの研究

    門屋 直人, 佐藤 春実, 尾崎 幸洋

    第64回高分子年次大会, 2015年05月, 日本語, 札幌コンベンションセンター, 国内会議

    ポスター発表

  • 赤外分光法による生分解性高分子の分子間相互作用の研究

    佐藤 春実

    FR-IR ・ラマン ユーザーズフォーラム2015, 2015年05月, 日本語, 千里ライフサイエンスセンター, 国内会議

    公開講演,セミナー,チュートリアル,講習,講義等

  • 赤外・ラマン分光法を用いたポリグリコール酸とポリ乳酸の共重合体の分子間相互作用についての研究

    西村 文太, 佐藤 春実, 尾崎 幸洋

    第64回高分子年次大会, 2015年05月, 日本語, 札幌コンベンションセンター, 国内会議

    ポスター発表

  • 振動分光法を用いたポリカプロラクトンとその共重合体の結晶構造および熱挙動に関する研究

    豊内 拓哉, 佐藤 春実, 尾崎 幸洋

    第64回高分子年次大会, 2015年05月, 日本語, 札幌コンベンションセンター, 国内会議

    ポスター発表

  • 振動分光法によるステレオコンプレックス型ポリ乳酸の水素結合に関する研究

    佐藤 春実, 成久 吉紀, 古川 大貴, 尾崎 幸洋

    第64回高分子年次大会, 2015年05月, 日本語, 札幌コンベンションセンター, 国内会議

    口頭発表(一般)

  • ラマン分光法及びテラヘルツ分光を用いた低分子量ポリ(3-ヒドロキシブタン酸)の結晶構造及び熱的挙動の研究

    宮井 智也, 門屋 直人, 保科 宏道, 尾崎 幸洋, 佐藤 春実

    第64回高分子年次大会, 2015年05月, 日本語, 札幌コンベンションセンター, 国内会議

    ポスター発表

  • オンライン近赤外分光法による、生分解性ポリエステルにおける、溶融押出混練時の残存結晶量変化による押出成形後の結晶化促進効果の解析

    青山 泰三, 佐藤 春実, 尾崎 幸洋

    第64回高分子年次大会, 2015年05月, 日本語, 札幌コンベンションセンター, 国内会議

    口頭発表(一般)

  • Confinement Effect of Chitin on the Crystallization Behavior of Poly(3-hydroxybutyrate)Thin Film Studied by Infrared-Reflection Absorption Spectroscopy and Grazing Incidence X-Ray Diffraction

    Khasanah, Isao Takahashi, Harumi Sato, Kummetha Raghunatha Reddy, Yukihiro Ozaki

    第64回高分子年次大会, 2015年05月, 英語, 札幌コンベンションセンター, 国内会議

    口頭発表(一般)

  • Analysis of Poly (3-hydroxbutyrate) during solvent induced crystallization process and its images

    曾 采薇, 石川 大太郎, 佐藤 春実, Wograveen Kanet, Young Mee Jung, 尾崎 幸洋

    第75回分析化学討論会, 2015年05月, 英語, 山梨大学甲府キャンパス, 国内会議

    口頭発表(一般)

  • 近赤外・赤外分光法とそのシフトイメージングによるポリ乳酸ステレオコンプレックスの結晶構造形成過程の研究

    古川大貴, 石川大太郎, 佐藤 春実, 石垣美和, Kummetha Raghunatha Reddy, 尾崎 幸洋

    第30回近赤外フォーラム, 2014年11月, 日本語, 筑波大学大学会館, 国内会議

    ポスター発表

  • Analysis of solvent-induced crystallization process of Poly-3-hydroxybutyrate (PHB) by using Near-Infrared Spectroscopy and its imaging

    Tsai-Wei Tseng, Daitaro Ishikawa, Harumi Sato, Kanet Wongravee, Young Mee Jung, Kummetha Raghunatha Reddy, Yukihiro Ozaki

    Biomedical Molecular Imaging 2014, 2014年11月, 英語, Taiwan, 国際会議

    ポスター発表

  • Analysis of solvent-induced crystallization process of Poly-3-hydroxybutyrate (PHB) by using Near-Infrared Spectroscopy

    曾 采薇, 石川 大太郎, 古川 大貴, Kanet Wongravee, Young Mee, JUNG, Kummetha, Raghunatha Reddy, 佐藤 春実, 尾崎 幸洋

    第30回近赤外フォーラム, 2014年11月, 英語, 筑波大学大学会館, 国内会議

    ポスター発表

  • 低波数ラマン・テラヘルツ分光および量子化学計算を用いたナイロン 6 の低波数振動モードと分子間相互作用の関連性の解明

    大西 絵里香, 山本 茂樹, 佐藤 春実, 石川 大太郎, 保科 宏道, 森澤 勇介, 尾崎 幸洋

    第63回高分子討論会, 2014年09月, 日本語, 長崎大学, 国内会議

    口頭発表(一般)

  • 赤外分光法及び量子科学計算を用いた低分子量ポリ-3-ヒドロキシブタン酸の結構造及び熱的挙動の研究

    門屋直人, 尾崎幸洋, 佐藤 春実

    第63回高分子討論会, 2014年09月, 日本語, 長崎大学, 国内会議

    ポスター発表

  • 赤外/ラマン分光法を用いたポリグリコール酸/ポリ乳酸共重合体の結晶構造とその熱挙動に関する研究

    西村 文太, 山本 茂樹, 尾崎 幸洋, 佐藤 春実

    第63回高分子討論会, 2014年09月, 日本語, 長崎大学, 国内会議

    ポスター発表

  • 近赤外分光法とそのイメージングによるポリ乳酸ステレオコンプレックスの結晶構造形成過程の研究

    佐藤 春実, 古川大貴, 大西絵里香, Tsai-Wei Tseng, 土原翔吾, 石川大太郎, 尾崎 幸洋

    第63回高分子討論会, 2014年09月, 日本語, 長崎大学, 国内会議

    ポスター発表

  • 近赤外分光法とそのイメージングによるpoly L-lactic acid/poly D-lactic acid stereocomplex PLA (SC-PLA)フィルムの結晶構造形成過程の研究

    古川大貴, 石川大太郎, 佐藤 春実, Kummetha, Raghunatha Reddy, 尾崎 幸洋

    日本分析化学会第63年会, 2014年09月, 日本語, 広島大学, 国内会議

    口頭発表(一般)

  • 近赤外分光を用いたポリ乳酸繊維の生分解および光分解とその風合い変化についての研究

    土原翔吾, 井上真里, 石川大太郎, 佐藤 春実

    第63回高分子討論会, 2014年09月, 日本語, 長崎大学, 国内会議

    ポスター発表

  • テラヘルツ分光による高分子の高次構造とダイナミクスの解明

    保科宏道, 鈴木晴, 石井伸弥, 山本茂樹, 森澤勇介, 佐藤春実, 尾崎幸洋, 大谷知行

    第63回高分子討論会, 2014年09月, 日本語, 長崎大学, 国内会議

    口頭発表(一般)

  • Study on the Molecular Interaction and its Inhomogeneity in Stereocomplex Crystallization of PLLA/PDLA Blends by using NIR imaging –NIR imaging can provide the molecular interaction and its homogeneity-

    Daiki Furukawa, Daitaro Ishikawa, Harumi Sato, Kummetha Raghunatha Reddy, Yukihiro Ozaki

    United States FACSS Annual Meeting, 2014年09月, 英語, Grand Sierra Resort, Reno, NV, 国際会議

    ポスター発表

  • Structure and crystallization behavior of poly(3-hydroxybutyrate) and chitin blends as thin films studied by reflection-absorption infrared spectroscopy and grazing incidence X-ray diffraction

    Khasanah, Raghunatha Reddy Kummetha, 佐藤 春実, 高橋 功, 尾崎 幸洋

    第63回高分子討論会, 2014年09月, 英語, 長崎大学, 国内会議

    ポスター発表

  • Investigation of solvent-induced crystallization process of poly (3-hydroxybutyrate) (PHB) by using NIR and its imaging

    Tsai-Wei Tseng, Daitaro Ishikawa, Kummetha Raghunatha Reddy, Harumi Sato, Yukihiro Ozaki

    United States FACSS Annual Meeting, 2014年09月, 英語, Grand Sierra Resort, Reno, NV, 国際会議

    ポスター発表

  • Investigation of Crystallinity Change in Poly Lactic Acid during Photodegradable Process by using a Newly Developed Wide Area NIR Camera (Compovision) –Analysis of photolysis process for biodegradable polymer by NIR imaging-

    Yukihiro Ozaki, Daitaro Ishikawa, Daiki Furukawa, Tsai-Wei Tseng, Asako Motomura, Yoko Ishigami, 佐藤春実, Kummetha Raghunatha Reddy

    United States FACSS Annual Meeting, 2014年09月, 英語, Grand Sierra Resort, Reno, NV, 国際会議

    口頭発表(一般)

  • Crystalline Structure and Thermal Behavior of Poly(butylene succinate) Studied by Infrared and Raman Spectroscopy

    Shota Noma, Harumi Sato, Yukihiro Ozaki

    第63回高分子討論会, 2014年09月, 英語, 長崎大学, 国内会議

    口頭発表(一般)

  • Analysis of solvent-induced crystallization process of Poly-3-hydroxybutyrate (PHB) by using Near-Infrared Spectroscopy

    曾 采薇, 石川大太郎, 古川大貴, Kummetha, Raghunatha Reddy, 佐藤 春実, 尾崎 幸洋

    日本分析化学会第63年会, 2014年09月, 英語, 広島大学, 国内会議

    口頭発表(一般)

  • Crystalline Poly - (R) - 3 – Hydroxybutyrate Studied by Raman Raman and Terahertz Spectroscopy and Quantum Mechanical Calculations

    Yukihiro Ozaki, Shigeaki Yamamoto, Harumi Sato, Yusuke Morisawa, Ichiro Tanabe, Hirpmichi Hoshina

    ICORS2014, 2014年08月, 英語, Jena Germany, 国際会議

    [招待有り]

    口頭発表(招待・特別)

  • A Study on Low-frequency Vibrational Modes and IntermolecularInteraction of Nylon 6 by Using Low-frequency Raman and Terahertz Spectroscopies Together with Quantum Chemical Calculation

    Erika Onishi, Shigeki Yamamoto, Harumi Sato, Daitaro Ishikawa, Hiromichi Hoshina, Yusuke Morisawa, Yukihiro Ozaki

    The International Symposium on Frontier of Terahertz Science 2014, 2014年08月, 英語, 国内会議

    口頭発表(一般)

  • 赤外分光法、小角広角X線散乱法を用いた低分子量ポリヒドロキシブタン酸の結晶構造及び熱的挙動の研究

    門屋直人, 佐藤 春実, 尾崎幸洋

    高分子研究発表会, 2014年07月, 日本語, 兵庫県民会館, 国内会議

    ポスター発表

  • 振動分光法によるジェランガムのゲル化機構に関する研究

    西村文太, 窪田健二, 佐藤 春実

    高分子研究発表会, 2014年07月, 日本語, 兵庫県民会館, 国内会議

    ポスター発表

  • 近赤外イメージングを用いたポリ乳酸繊維の生分解性と風合いの変化について

    土原翔吾, 石川大太郎, 井上真理, 佐藤 春実

    高分子研究発表会, 2014年07月, 日本語, 兵庫県民会館, 国内会議

    ポスター発表

  • Intermolecular Interaction and Thermal Behavior of Polyglycolide Studied by Infrared Spectroscopy and Quantum Chemical Calculation

    Harumi Sato, Mai Miyada, ShigekiYamamoto, Kummetha Raghunatha Reddy, Yukihiro Ozaki

    MACRO 2014, 2014年07月, 英語, Chiang Mai, Thailand, 国際会議

    ポスター発表

  • Intermolecular Hydrogen Bonding and Gelation Mechanism of GellanGum by Vibrational Spectroscopy

    Fumita Nishimura, Kenji Kubota, YukihiroOzaki, HarumiSato

    MACRO 2014, 2014年07月, 英語, Chiang Mai, Thailand, 国際会議

    ポスター発表

  • Infrared Spectroscopy and SAXS/WAXD Studies on Crystal Structures and Thermal Behavior of Low Molecular Weight Poly(3-hydroxybutyrate)

    Naoto Kadoya, Harumi Sato, YukihiroOzaki

    MACRO 2014, 2014年07月, 英語, Chiang Mai, Thailand, 国際会議

    ポスター発表

  • Evaluation of Soil Biodegradability of Poly(lactic acid) Fabrics by NIR imaging

    Shogo Tsuchihara, Mari Inoue, Daitarou Ishikawa, Harumi Sato

    MACRO 2014, 2014年07月, 英語, Chiang Mai, Thailand, 国際会議

    ポスター発表

  • 小野市男女共同参画センター 平成25年度啓発セミナー講師「未来のリケジョ応援講座」

    佐藤 春実

    小野市男女共同参画センター, 2014年06月, 日本語, 小野市うるおい交流館エクラ, 国内会議

    公開講演,セミナー,チュートリアル,講習,講義等

  • Investigation of the molecular interaction and its inhomogeneity in poly L-lactic acid/poly D-lactic acid stereocomplex PLA (SC-PLA) film by using NIR Imaging

    Daiki Furukawa, Daitaro Ishikawa, Harumi Sato, Kummetha Raghunatha Reddy, Yukihiro Ozaki

    Asian NIR Symposium, 2014年06月, 英語, Korea, 国際会議

    ポスター発表

  • Investigation of solvent-induced crystallization process of PHB by using NIR and its imaging

    Yukihiro Ozaki, Tseng Tsai-Wei, Daitaro Ishikawa, Kummetha Raghunatha Reddy, Harumi Sato

    Asian NIR Symposium, 2014年06月, 英語, Korea, 国際会議

    口頭発表(一般)

  • 赤外分光法、小角広角 X 線散乱法を用いた低分子量ポリヒドロキシブタン酸の結晶構造及び熱的挙動の研究

    門屋直人, 佐藤 春実, 尾崎幸洋

    第63回高分子年次大会, 2014年05月, 日本語, 名古屋国際会議場, 国内会議

    ポスター発表

  • 赤外分光法を用いたポリブチレンサクシネート(PBS)の結晶構造とその熱挙動の研究

    野間翔太, 佐藤 春実, 山本茂樹, Kummetha Raghunatha Reddy, 尾崎幸洋

    第63回高分子年次大会, 2014年05月, 日本語, 名古屋国際会議場, 国内会議

    ポスター発表

  • 振動分光法を用いたジェランガムのゲル化機構についての研究

    西村文太, 窪田健二, 尾崎幸洋, 佐藤 春実

    第63回高分子年次大会, 2014年05月, 日本語, 名古屋国際会議場, 国内会議

    ポスター発表

  • 振動分光法および量子化学計算を用いたポリグリコール酸の分子間相互作用に関する研究

    佐藤 春実, 宮田真衣, 山本茂樹, 尾崎幸洋

    第63回高分子年次大会, 2014年05月, 日本語, 名古屋国際会議場, 国内会議

    ポスター発表

  • 近赤外イメージング装置(Compovision)を用いたポリ乳酸の光分解過程モニタリング

    石川 大太郎, 古川 大貴, Tseng, Tsai Wei, 本村 麻子, 五十嵐 陽子, 佐藤 春実, 尾崎 幸洋

    第74回分析化学討論会, 2014年05月, 日本語, 日本大学工学部(福島), 国内会議

    口頭発表(一般)

  • 近赤外イメージングを用いたポリ乳酸繊維の生分解性と風合いについての研究

    土原翔吾, 石川大太郎, 井上真理, 佐藤 春実

    第63回高分子年次大会, 2014年05月, 日本語, 名古屋国際会議場, 国内会議

    ポスター発表

  • 近赤外イメージングを用いたpoly-L-lactic acid(PLLA)/poly-D-lactic acid(PDLA)ステレオコンプレックス(SC-PLA)フィルムの混合不均一性の解明

    古川 大貴, 石川 大太郎, Kummetha Raghunatha Reddy, 曾 采薇, 佐藤 春実, 尾崎 幸洋

    第74回分析化学討論会, 2014年05月, 日本語, 日本大学工学部(福島), 国内会議

    ポスター発表

  • Investigation of Solvent-Induced Crystallization Process of Poly(3-hydroxybutyrate) by using Near Infrared Spectroscopy and Its Imaging

    Tseng Tsai Wei, Daitaro Ishikawa, Daiki Furukawa, Kummetha Raghunatha Reddy, Harumi Sato, Yukihiro Ozaki

    第74回分析化学討論会, 2014年05月, 英語, 日本大学工学部(福島), 国内会議

    ポスター発表

  • 低波数ラマン、テラヘルツ分光及び量子化学計算を用いたポリグリコール酸の分子間相互作用に関する研究

    宮田真衣, 佐藤春実, 山本茂樹, 保科宏道, 尾崎幸洋

    平成25年度本分光学会年次講演会, 2013年11月, 日本語, 東京工業大学, 国内会議

    ポスター発表

  • 減衰全反射遠紫外分光法によるポリエチレンの表面構造の研究―作製方法の違いおよび温度依存性―

    谷村恵里香, 森澤勇介, 佐藤 春実, 苅山直美, 東昇, 尾崎幸洋

    日本分光学会年次講演会, 2013年11月, 日本語, 国内会議

    ポスター発表

  • 低波数ラマン、テラヘルツ分光及び量子化学計算を用いたポリグリコール酸の分子間相互作用に関する研究

    宮田真衣, 佐藤 春実, 山本茂樹, 保科宏道, 尾崎幸洋

    テラヘルツ分光法の最先端 Ⅶ, 日本分光学会, 2013年10月, 日本語, 国内会議

    ポスター発表

  • 低波数ラマン,テラヘルツ分光及び量子化学計算を用いたナイロン6の温度変化に伴う構造変化に関する研究

    大西絵里香, 山本茂樹, 佐藤 春実, Kummetha Raghunatha Reddy, 石川 大太郎, 保科 宏道, 森澤 勇介, 尾崎 幸洋

    分析化学会第62年会, 2013年09月, 日本語, 国内会議

    口頭発表(一般)

  • 低波数ラマン、テラヘルツ分光及び量子化学計算によるナイロン6の温度変化に伴う分子間相互作用及び構造変化に関する研究

    大西絵里香, 佐藤 春実, 山本茂樹, Kummetha Raghunatha Reddy, 石川大太郎, 石井伸弥, 保科宏道, 森澤勇介, 尾崎 幸洋

    高分子討論会, 2013年09月, 日本語, 国内会議

    ポスター発表

  • 赤外、ラマン分光法と量子化学計算を用いたポリブチレンサクシネートの結晶構造と結晶相転移の研究

    野間翔太, 佐藤 春実, Kummetha Raghunatha Reddy, 山本茂樹, 宮田真衣, 尾崎幸洋

    高分子討論会, 2013年09月, 日本語, 国内会議

    口頭発表(一般)

  • 振動分光法・X線回折法・量子力学計算を用いたポリグリコール酸の分子間相互作用と熱挙動に関する研究

    宮田真衣, 佐藤 春実, 山本茂樹, Kummetha Raghunatha Reddy, 尾崎幸洋

    高分子討論会, 2013年09月, 日本語, 国内会議

    口頭発表(一般)

  • 振動分光法および量子化学計算を用いたポリブチレンサクシネートの延伸による結晶相転移の研究

    野間翔太, 佐藤 春実, 山本茂樹, Kummetha Raghunatha Reddy, 尾崎幸洋

    繊維学会秋季研究発表会, 2013年09月, 日本語, 国内会議

    ポスター発表

  • 固体極表面用減衰全反射遠紫外分光法を用いたポリエチレンの熱挙動に関する研究

    谷村恵里香, 森澤勇介, 佐藤 春実, 苅山直美, 東昇, 尾崎幸洋

    分析化学会第62年会, 2013年09月, 日本語, 国内会議

    ポスター発表

  • 近赤外イメージング分光法を用いたポリ乳酸繊維の生分解性評価

    佐藤 春実, 土原 翔吾, 石川 大太郎

    高分子討論会, 2013年09月, 日本語, 国内会議

    ポスター発表

  • ポリヒドロキシブタン酸における弱い水素結合が結晶構造安定化と熱的挙動に果たす役割

    佐藤 春実, 門屋直人, 尾崎幸洋

    繊維学会秋季研究発表会, 2013年09月, 日本語, 国内会議

    口頭発表(一般)

  • 41.振動分光法・X線回折法・量子力学計算を用いたポリグリコール酸の分子間相互作用と熱挙動に関する研究

    宮田真衣, 佐藤春実, 山本茂樹, Kummetha Raghunatha Reddy, 尾崎幸洋

    高分子討論会, 2013年09月, 日本語, 金沢大学, 国内会議

    口頭発表(一般)

  • Tip-enhanced Raman spectroscopic study of the property of carbon nanotubes in polystyrene/singlewall carbon nanotubes nanocomposites

    Toshiaki Suzuki, Xinlei Yan, Takeshi Miyake, Yasutaka Kitahama, Harumi Sato, Tamitake Itoh, Takeshi Miura, Yukihiro Ozaki

    Seventh International Conference on Advanced Vibrational Spectroscopy (ICAVS-7), 2013年08月, 英語, 国際会議

    口頭発表(一般)

  • Terahertz Vibrational Spectroscopy of Poly(3-hydroxybutyrate) and Nylon,

    Hiromichi Hoshina, Yusuke Morisawa, Shinya Ishii, Shigeki Yamamoto, Hal Suzuki, Harumi Sato, Yukihiro Ozaki, Chiko Otani

    Seventh International Conference on Advanced Vibrational Spectroscopy (ICAVS-7), 2013年08月, 英語, 国際会議

    口頭発表(一般)

  • Temperature-dependent Structural Changes and Intermolecular Hydrogen Bonds in Nylon 6 Studied by Low-frequency Raman and Terahertz Spectroscopies and Quantum Chemical Calculation

    Erika Onishi, Harumi Sato, Shigeki Yamamoto, Kummetha Raghunatha Reddy, Daitaro Ishikawa, Shinya Ishii, Hal Suzuki, Hiromichi Hoshina, Yusuke Morisawa, Yukihiro Ozaki

    Seventh International Conference on Advanced Vibrational Spectroscopy (ICAVS-7), 2013年08月, 英語, 国際会議

    ポスター発表

  • Study on Crystallization Behavior and Intermolecular Interactions in Biodegradable Blend Between Poly(3-hydroxybutyrate) and Chitin

    Khasanah, Kummetha Raghunatha Reddy, Nicolas Spegazzini, Harumi Sato, Yukihiro Ozaki

    Seventh International Conference on Advanced Vibrational Spectroscopy (ICAVS-7), 2013年08月, 英語, 国際会議

    ポスター発表

  • Low-Frequency Raman and THz Spectroscopy of polystyrene

    Yusuke Morisawa, Yusaku Suenaga, Harumi Sato, Hiromichi Hoshina, Yukihiro Ozaki

    Seventh International Conference on Advanced Vibrational Spectroscopy (ICAVS-7), 2013年08月, 英語, 国際会議

    ポスター発表

  • Isothermal Crystallization of Poly(3-hydroxybutyrate) and Cellulose Acetate Butyrate Blends studied by IR and NIR Imaging

    Harumi Sato, Nattaporn Suttiwijitpukdee, Miriam Unger, Yukihiro Ozaki

    Seventh International Conference on Advanced Vibrational Spectroscopy (ICAVS-7), 2013年08月, 英語, 国際会議

    ポスター発表

  • Intermolecular Interaction and Thermal Behavior of Polyglycolide Studied by Low Frequency Raman Spectroscopy and Quantum Chemical Calculation

    Mai Miyada, Harumi Sato, Shigeki Yamamoto, Kummetha Raghunatha Reddy, Yukihiro Ozaki

    Seventh International Conference on Advanced Vibrational Spectroscopy (ICAVS-7), 2013年08月, 英語, 国際会議

    ポスター発表

  • Gelation Mechanism of Gellan Gum Studied By Infrared Spectroscopy

    Fumita Nishimura, Takafumi Sakiyama, Harumi Sato, Kenji Kubota, Yukihiro Ozaki

    Seventh International Conference on Advanced Vibrational Spectroscopy (ICAVS-7), 2013年08月, 英語, 国際会議

    ポスター発表

  • Crystal Structures and Thermal Behavior of Polyhydroxyalkanoates Studied by Infrared Spectroscopy and Wide Angle X-ray Diffraction

    Harumi Sato, Yukihiro Ozaki

    Seventh International Conference on Advanced Vibrational Spectroscopy (ICAVS-7), 2013年08月, 英語, 国際会議

    口頭発表(一般)

  • Crystal Structures and Thermal Behavior of Low Molecular Weight Poly(3-Hydroxybutyrate) Studied by Infrared Spectroscopy and Wide Angle X-Ray Diffraction

    Naoto Kadoya, Harumi Sato, Yukihiro Ozaki

    Seventh International Conference on Advanced Vibrational Spectroscopy (ICAVS-7), 2013年08月, 英語, 国際会議

    ポスター発表

  • Crystalline Transition Mechanism and Thermal Behavior of Poly(butylene succinate) Studied by IR, Raman Spectroscopy and Quantum Chemical Calculation

    Shota Noma, Harumi Sato, Kummetha Raghunatha Reddy, Shigeki Yamamoto, Yukihiro Ozaki

    Seventh International Conference on Advanced Vibrational Spectroscopy (ICAVS-7), 2013年08月, 英語, 国際会議

    ポスター発表

  • Correlation between the Torsional Motion of Methyl Groups and the Weak Intermolecular Hydrogen Bonds Based on the Temperature-dependent Raman Spectra of Biodegradable Poly(3-hydroxybutyrate)

    Kummetha Raghunatha Reddy, Shigeki Yamamoto, Harumi Sato, Yukihiro Ozaki

    Seventh International Conference on Advanced Vibrational Spectroscopy (ICAVS-7), 2013年08月, 英語, 国際会議

    ポスター発表

  • Biodegradability and Handle of Poly(lactic acid) Fabrics

    Shogo Tsuchihara, Mari Inoue, Yukihiro Ozaki, Harumi Sato

    Seventh International Conference on Advanced Vibrational Spectroscopy (ICAVS-7), 2013年08月, 英語, 国際会議

    ポスター発表

  • 低波数ラマンと量子力学計算によるポリグリコール酸の分子間相互作用に関する研究

    宮田真衣, 佐藤 春実, 山本茂樹, Kummetha Raghunatha Reddy, 尾崎幸洋

    高分子研究会発表, 2013年07月, 日本語, 国内会議

    ポスター発表

  • Temperature-dependent structural changes and intermolecular hydrogen bonds in Nylon 6 studied by low-frequency Raman and Terahertz spectroscopies and Quantum chemical calculation

    Erika Onishi, Harumi Sato, Shigeki Yamamoto, Kummetha, Raghunatha Reddy, Daitaro Ishikawa, Shinya Ishii, Hal Suzuki, Hiromichi Hoshina, Yusuke Morisawa, Yukihiro Ozaki

    19th European Symposium on Polymer Spectroscopy (ESOPS19), 2013年07月, 英語, 国際会議

    ポスター発表

  • Temperature-dependent Fourier Transform Infrared Spectroscopy and Raman Spectroscopy of Biodegradable Poly(3-hydroxybutyrate)

    Kummetha Raghunatha Reddy, Shigeki Yamamoto, Yukihiro Ozaki, Harumi Sato

    高分子研究会発表会, 2013年07月, 英語, 国内会議

    口頭発表(一般)

  • Intermolecular vibrational modes of crystalline poly-(R)-3-hydroxybutyrate

    Shigeki Yamamoto, Yusuke Morisawa, Harumi Sato, Hiromichi Hoshina, Yukihiro Ozaki

    19th European Symposium on Polymer Spectroscopy (ESOPS19), 2013年07月, 英語, 国際会議

    ポスター発表

  • Intermolecular Interactions of Polyglycolic acid Studied by Vibrational Spectroscopy, Wide Angle X-ray Diffraction, and Quantum Chemical Calculation

    Harumi Sato, Mai Miyada, Shigeki Yamamoto, Yukihiro Ozaki

    19th European Symposium on Polymer Spectroscopy (ESOPS19), 2013年07月, 英語, 国際会議

    口頭発表(一般)

  • Intermolecular Interaction and Crystallization Behavior of Poly(3-hydroxybutyrate) and Chitin Blends Studied by Vibrational Spectroscopy and Wide-Angle X-ray Diffraction

    Khasanah, Kummetha Raghunatha Reddy, Yukihiro Ozaki, Harumi Sato

    高分子研究会発表会, 2013年07月, 英語, 国内会議

    ポスター発表

  • Gelation mechanism of gellan gum studied by infrared and Raman spectroscopy

    Harumi Sato, Takafumi Sakiyama, Kenji Kubota, Yukihiro Ozaki

    19th European Symposium on Polymer Spectroscopy (ESOPS19), 2013年07月, 英語, 国際会議

    ポスター発表

  • Crystalline structure and thermal behavior of poly(butylene succinate) studied by Raman spectroscopy and quantum chemical calculations

    Shota Noma, Harumi Sato, Kummetha, Raghunatha Reddy, Shigeki Yamamoto, Yukihiro Ozaki

    19th European Symposium on Polymer Spectroscopy (ESOPS19), 2013年07月, 英語, 国際会議

    ポスター発表

  • Role of Hydrogen Bonding of Poly(3-hydroxybutyrate) Studied by Infrared Spectroscopy and Wide Angle X-ray Diffraction

    Harumi Sato

    The 3rd discussion meeting on advanced Polymer, 2013年06月, 英語, 国際会議

    [招待有り]

    口頭発表(招待・特別)

  • Application of a High Speed Hyper-spectral NIR Camera (Compovision) for Polymer Material Industries-Quantitative Analysis of Crystallinity of poly-L-lactic acid (PLLA)-

    Daitaro Ishikawa, Takashi Nishii, Fumiaki Mizuno, Harumi Sato, Yukihiro Ozaki

    ICNIRS '13, 2013年06月, 英語, 国際会議

    ポスター発表

  • 低波数ラマン、テラヘルツ分光及びX線回折によるナイロンの温度依存構造変化及び水素結合に関する研究

    大西絵里香, 石川大太郎, 山本茂樹, 佐藤 春実, Kummetha Raghunatha Reddy, 石井伸弥, 鈴木晴, 保科宏道, 森澤勇介, 尾崎幸洋

    高分子学会年次大会, 2013年05月, 日本語, 国内会議

    ポスター発表

  • 低波数ラマンと量子力学計算を用いたポリグリコール酸の分子間相互作用に関する研究

    宮田 真衣, 佐藤 春実, 山本 茂樹, Kummetha, Raghunatha Reddy, 尾崎 幸洋

    高分子学会年次大会, 2013年05月, 日本語, 国内会議

    ポスター発表

  • 低波数ラマン, テラヘルツ分光, 量子化学計算によるナイロンの低波数スペクトル解析

    大西 絵里香, 山本 茂樹, 佐藤 春実, 石川 大太郎, Kummetha, Raghunatha Reddy, 石井 伸弥, 鈴木 晴, 保科 宏道, 森澤 勇介, 尾崎 幸洋

    第73回分析化学討論会, 2013年05月, 日本語, 国内会議

    口頭発表(一般)

  • 赤外ラマン分光法及び量子化学計算によるポリブチレンサクシネート(PBS)の結晶構造と熱挙動の研究

    野間翔太, 佐藤 春実, Kummetha Raghunatha Reddy, 山本茂樹, 宮田真衣, 尾崎幸洋

    高分子学会年次大会, 2013年05月, 日本語, 京都国際会議場, 国内会議

    ポスター発表

  • 減衰全反射遠紫外分光法を用いたポリエチレンのスペクトルと表面構造の研究

    谷村恵里香, 森澤勇介, 佐藤 春実, 苅山直美, 東昇, 尾崎幸洋

    第73回分析化学討論会, 2013年05月, 日本語, 国内会議

    口頭発表(一般)

  • Temperature Dependence of Vibrational Spectroscopic study of Poly(3-hydroxybutyrate)

    Raghunatha Reddy Kummetha, Shigeki Yamamoto, Harumi Sato, Yukihiro Ozaki

    高分子学会年次大会, 2013年05月, 英語, 国内会議

    口頭発表(一般)

  • Investigation of Intermolecular Interaction and Crystallization Behavior of Blends between Poly(3-hydroxybutyrate) and Chitin Based on the Thermal Properties, X-ray Scattering and Vibrational Spectroscopic Measurements

    Khasanah, Kummetha Raghunatha Reddy, Yukihiro Ozaki, Harumi Sato

    高分子学会年次大会, 2013年05月, 英語, 国内会議

    ポスター発表

  • FT-IRおよびFT-NIRイメージング分光法によるポリヒドロキシブタン酸/セルロース誘導体の球晶における水素結合の影響

    佐藤 春実, Suttiwijitpukdee Nattaporn, 尾崎 幸洋

    高分子学会年次大会, 2013年05月, 日本語, 国内会議

    ポスター発表

  • 減衰全反射遠紫外分光法を用いたポリエチレンを主鎖にもつ接着樹脂の表面構造の研究

    森澤勇介, 中山篤史, 小野和也, 谷村恵里香, 佐藤 春実, 苅山直美, 東昇, 尾崎幸洋

    日本化学会年会, 2013年03月, 日本語, 国内会議

    口頭発表(一般)

  • コンポビジョンによる生分解性マルチフィルム材料(ポリ乳酸)の結晶化度評価に関する研究

    石川大太郎, 西井崇, 井口拓哉, 水野史章, 佐藤 春実, 尾崎幸洋

    近赤外フォーラム, 2013年03月, 日本語, 国内会議

    ポスター発表

  • Vibrational spectroscopy study on carbon nanotube/polymer nanocomposites

    Xinlei Yan, Yasutaka Kitahama, Harumi Sato, Toshiaki Suzuki, Tamitake Itoh, Yukihiro Ozaki

    The 9th SPSJ International Polymer Conference (IPC2012), 2012年12月, 英語, Kobe, JAPAN, 国際会議

    ポスター発表

  • Tip-enhanced Raman spectroscopy study of intermolecular interactions and molecular orientation at interface of styrene-butadiene rubber/multiwall carbon nanotubes nanocomposites

    Toshiaki Suzuki, Xinlei Yan, Yasutaka Kitahama, Harumi Sato, Tamitake Itoh, Takeshi Miura, Yukihiro Ozaki

    The 9th SPSJ International Polymer Conference, 2012年12月, 英語, Kobe, JAPAN, 国内会議

    口頭発表(一般)

  • Simultaneous Synchrotron SAXS/WAXD Study of Composition Fluctuations, Cold-Crystallization, and Melting in Biodegradable Polymer Blends of Cellulose Acetate Butyrate and Poly(3-hydroxybutyrate)

    Harumi Sato, Nattaporn Suttiwijitpukdee, Takeji Hashimoto, Yukihiro Ozaki

    The 9th SPSJ International Polymer Conference (IPC2012), 2012年12月, 英語, Kobe, JAPAN, 国内会議

    口頭発表(一般)

  • Gelation Mechanism and Hydrogen Bonding Behavior of Gellan Gum Studied by Vibrational Spectroscopy and Small Angle X-ray Scattering

    Takafumi Sakiyama, Harumi Sato, Kenji Kubota, Yukihiro Ozaki

    The 9th SPSJ International Polymer Conference (IPC2012), 2012年12月, 英語, Kobe, Japan, 国内会議

    ポスター発表

  • FT-IR and FT-NIR Imaging Spectroscopy Studies on Effects of Hydrogen Bond Intermolecular Interactions of Poly(3-hydroxybutyrate) and Cellulose Acetate Butyrate Blends

    Harumi Sato, Nattaporn Suttiwijitpukdee, Miriam Unger, Yukihiro Ozaki

    The 9th SPSJ International Polymer Conference (IPC2012), 2012年12月, 英語, Kobe, JAPAN, 国内会議

    ポスター発表

  • Crystal Structure and Thermal Behavior of Polyglycolide Studied by Vibrational Spectroscopy, Wide Angle X-ray Diffraction, and Quantum Chemical Calculation

    Mai Miyada, Harumi Sato, Shigeki Yamamoto, Yukihiro Ozaki

    The 9th SPSJ International Polymer Conference (IPC2012), 2012年12月, 英語, Kobe, JAPAN, 国内会議

    ポスター発表

  • Crystal Structure and Thermal Behavior of Biodegradable Polymer Blends of Poly(3-hydroxybutyrate) and Chitin Studied by Infrared Spectroscopy and Wide Angle X-ray Diffraction

    Khasanah, Harumi Sato, Nicolas Spegazzini, Yukihiro Ozaki

    The 9th SPSJ International Polymer Conference (IPC2012), 2012年12月, 英語, Kobe, JAPAN, 国内会議

    ポスター発表

  • Crystalline Structure and Thermal Behavior of Poly(butylene succinate) and Poly(butylene succinate-co-adipate) Studied by Infrared Spectroscopy and Wide Angle X-ray Diffraction

    Shouta Noma, Harumi Sato, Yukihiro Ozaki

    The 9th SPSJ International Polymer Conference (IPC2012) De, 2012年12月, 英語, 国内会議

    ポスター発表

  • Terahertz Absorption Spectra of Nylons for Various Crystalline Conformations

    Hal SUZUKI, Shinya ISHII, Harumi SATO, Shigeki YAMAMOTO, Yusuke MORISAWA, Yukihiro OZAKI, Tetsuya UCHIYAMA, Chiko OTANI, Hiromichi HOSHINA

    International Symposium on Frontiers in THz Technology, 2012年11月, 英語, Nara, Japan, 国内会議

    ポスター発表

  • Two-Dimensional Correlation Spectroscopy of Polymer in Terahertz Frequency Region

    Hiromichi Hoshina, Shinya Ishii, Yusuke Morisawa, Harumi Sato, Shigeki Yamamoto, Isao Noda, Yukihiro Ozaki, Chiko Otani

    FACCS 2012, 2012年10月, 英語, KANSAS CITY, MO, 国際会議

    口頭発表(一般)

  • Intermolecular Vibrations of poly-(R)-3-hydroxybutyrate in Low-Frequency Raman and THz Time-Domain Spectra Explored by DFT Calculation with Cartesian Coordinate Tensor Transfer

    Shigeki Yamamoto, Yusuke Morisawa, Hiromichi Hoshina, Shinya Ishii, Harumi Sato, Chiko Otani, Yukihiro Ozaki

    FACCS 2012, 2012年10月, 英語, KANSAS CITY, MO, 国際会議

    ポスター発表

  • Extreme Surface Analysis of Polyethylenes by Attenuated Total Reflection Far-ultraviolet Spectroscopy ― Comparison with Atomic Force Microscope Measurement ―

    Erika Tanimura, Yusuke Morisawa, Harumi Sato, Naomi Kariyama, Noboru Higashi, Yukihiro Ozaki

    The Federation of Analytical Chemistry and Spectroscopy Societies (FACSS), 2012年10月, 英語, Kansas City, MO, United States, 国際会議

    ポスター発表

  • Crystal Structure and Thermal Behavior of Polyglycolide Studied by Vibrational Spectroscopy, Wide Angle X-ray Diffraction, and Quantum Chemical Calculation

    Mai Miyada, Harumi Sato, Shigeki Yamamoto, Yukihiro Ozaki

    The Federation of Analytical Chemistry and Spectroscopy Societies (FACSS), 2012年10月, 英語, Kansas City, MO, United States, 国際会議

    ポスター発表

  • Crystallinity Evaluation of a Biodegradable Polymer by using the new NIR Camera (Compovision) Developed for High Speed Wide Area Measurement

    Daitaro Ishikawa, Takashi Nishii, Fumiaki Mizuno, Harumi Sato, Yukihiro Ozaki

    FACCS 2012, 2012年10月, 英語, KANSAS CITY, MO, 国際会議

    ポスター発表

  • 低波数ラマン分光と量子化学計算による高分子の振動解析

    山本 茂樹, 森澤 勇介, 保科 宏道, 佐藤 春実, 尾崎 幸洋

    第6回分子科学討論会, 2012年09月, 日本語, 東京大学本郷キャンパス, 国内会議

    ポスター発表

  • 振動分光法・X 線回折法・量子化学計算によるポリグリコール酸の結晶構造と熱挙動の研究

    宮田 真衣, 佐藤 春実, 山本 茂樹, 尾崎 幸洋

    第61回高分子討論会, 2012年09月, 日本語, 名古屋工業大学, 国内会議

    ポスター発表

  • 振動分光法および小角X線散乱法を用いたジェランガムのゲル化過程に関する研究

    崎山 貴文, 佐藤 春実, 窪田 健二, 尾崎 幸洋

    第61回高分子討論会, 2012年09月, 日本語, 名古屋工業大学, 国内会議

    口頭発表(一般)

  • 減衰全反射遠紫外分光法によるナイロン極表面の電子状態の研究

    泰永 愛佳, 森澤 勇介, 佐藤 春実, 江原 正博, 池羽田 晶文, 東 昇, 尾崎 幸洋

    第6回分子科学討論会, 2012年09月, 日本語, 東京大学本郷キャンパス, 国内会議

    口頭発表(一般)

  • 減衰全反射遠紫外スペクトルによるポリエチレンの極表面分析―AFM測定との比較―

    谷村 恵里香, 森澤 勇介, 佐藤 春実, 苅山 直美, 東 昇, 尾崎 幸洋

    分析化学会第61年会, 2012年09月, 日本語, 金沢大学角間キャンパス, 国内会議

    口頭発表(一般)

  • ポリエチレン表面の電子状態の研究

    森澤 勇介, 谷村 恵里香, 佐藤 春実, 苅山 直美, 東 昇, 尾崎 幸洋

    第6回分子科学討論会, 2012年09月, 日本語, 東京大学本郷キャンパス, 国内会議

    ポスター発表

  • テラヘルツ周波数領域における高分子の振動分光

    保科 宏道, 山本 茂樹, 森澤 勇介, 石井 伸弥, 鈴木 晴, 佐藤 春実, 尾崎 幸洋, 内山 哲治, 大谷 知行

    第6回分子科学討論会, 2012年09月, 日本語, 東京大学本郷キャンパス, 国内会議

    口頭発表(一般)

  • Vibrational Spectroscopy study of Carbon Nanotube based Polymer Nanocomposits

    ヤン 新蕾, 佐藤 春実, 北浜 康孝, 鈴木 敏明, 伊藤 民武, 尾崎 幸洋

    第61回高分子討論会, 2012年09月, 英語, 名古屋工業大学, 国内会議

    ポスター発表

  • Vibrational spectra of nylon-6, nylon-6/6, nylom-11 and nylon-12 studied by terahertz spectroscopy

    Hal Suzuki, Shinya Ishii, Chiko Otani, Hiromichi Hoshina, Yusuke Morisawa, Harumi Sato, Shigeki Yamamoto, Yukihiro Ozaki, Tetsuji Uchiyama

    The 37th The International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012年09月, 英語, Wollongong, Australia, 国際会議

    口頭発表(一般)

  • Terahertz spectroscopy of nylon-6,nylon-6/6, nylom-11 and nylon-12

    Hal Suzuki, Sinya Isii, Harumi Sato, Shigeki Yamamoto, Yusuke Morisawa, Yukihiro Ozaki, Tetsuharu Uchiyama, Chiko Otani

    第61回高分子討論会, 2012年09月, 英語, 名古屋工業大学, 国内会議

    口頭発表(一般)

  • SAXS/WAXD Study of CompositionFluctuations, Cold-Crystallization, and Melting in Cellulose Acetate Butyrate and Poly(3-hydroxybutyrate) blends

    Harumi Sato, Nattaporn Suttiwijitpukdee, Takeji Hashimoto, Yukihiro Ozaki

    第61回高分子討論会, 2012年09月, 英語, 名古屋工業大学, 国内会議

    口頭発表(一般)

  • Electronic States on Extreme Surface of Polymers Studied by Using Attenuated Total Reflection Spectroscopy in Far Ultraviolet Region

    Erika Tanimura, Yusuke Morisawa, Harumi Sato, Naomi Kariyama, Noboru Higashi, Yukihiro Ozaki

    The 9th SPSJ International Polymer Conference (IPC2012), 2012年09月, 英語, Kobe, JAPAN, 国際会議

    ポスター発表

  • Attenuated Total Reflection Spectroscopy in Far Ultraviolet Region (ATR-FUV) for Extreme Surface of Polymers

    Yusuke Morisawa, Erika Tanimura, Harumi Sato, Naomi Kariyama, Noboru Higashi, Yukihiro Ozaki

    RSC Tokyo International Conference - Micro/Nano Technologies for Analysis of Human Health and Diagnostics -, 2012年09月, 英語, Makuhari Messe, Chiba, 国際会議

    ポスター発表

  • 振動分光法で生分解性高分子の構造と相互作用を探る

    佐藤 春実

    白樺夏季大学, 2012年08月, 日本語, 草津セミナーハウス, 国内会議

    口頭発表(招待・特別)

  • 赤外分光法とX線回折法によるポリグリコール酸の結晶構造と熱挙動に関する研究

    宮田 真衣, 佐藤 春実, 尾崎 幸洋

    第58回高分子研究発表会(神戸), 2012年07月, 日本語, 兵庫県民会館, 国内会議

    ポスター発表

  • ジェランガムのゲル化におけるpHの影響

    崎山 貴文, 佐藤 春実, 窪田 健二, 尾崎 幸洋

    第58回高分子研究発表会(神戸), 2012年07月, 日本語, 兵庫県民会館, 国内会議

    ポスター発表

  • Laser heating effect study to Multi-Wall Carbon Nanotube and Styrenen-Butadiene Rubber/ Multi-Wall Carbon nanotube composites

    Xinlei Yan, Yasutaka Kitahama, Tamitake Itoh, Harumi Sato, Toshiaki Suzuki, Xiaoxia Han, Liliane Bokobza, Yukihiro Ozaki

    第58回高分子研究発表会(神戸), 2012年07月, 英語, 兵庫県民会館, 国内会議

    ポスター発表

  • 赤外分光法を用いたP(MMA-co-MA)における水素結合とその熱挙動の研究

    佐藤 春実, 下村 佳子, 尾崎 幸洋

    第61回高分子学会年次大会, 2012年05月, 日本語, パシフィコ横浜, 国内会議

    ポスター発表

  • 赤外分光法とX線回折法によるポリグリコール酸の結晶構造と熱挙動に関する研究

    宮田 真衣, 佐藤 春実, 尾崎 幸洋

    第61回高分子学会年次大会, 2012年05月, 日本語, パシフィコ横浜, 国内会議

    ポスター発表

  • 時間分解小角・広角X 線散乱測定によるポリヒドロキシブタン酸の結晶化過程の研究

    佐藤 春実, Longhai Guo, Nicolas Spegazzini, 尾崎 幸洋, 橋本 竹治, 増永 啓康, 高田 昌樹, 佐々木 園

    第61回高分子学会年次大会, 2012年05月, 日本語, パシフィコ横浜, 国内会議

    ポスター発表

  • 減衰全反射遠紫外分光法を用いたポリエチレンのスペクトルと表面構造の研究

    谷村 恵里香, 森澤 勇介, 立花 慎, 佐藤 春実, 苅山 直美, 東 昇, 尾崎 幸洋

    第72回分析化学討論会, 2012年05月, 日本語, 鹿児島大学工学部 郡元キャンパス, 国内会議

    ポスター発表

  • ジェランガムのゲル化におけるpHの影響

    崎山 貴文, 佐藤 春実, 尾崎 幸洋, 窪田 健二

    第61回高分子学会年次大会, 2012年05月, 日本語, パシフィコ横浜, 国内会議

    ポスター発表

  • Styrene-Butadiene Rubber/Multiwall Carbon Nanotubes Nanocomposites Studied by Raman Spectroscopy

    Harumi Sato, Xinlei Yan, Yasutaka Kitahama, Tamitake Itoh, Toshiaki Suzuki, Liliane Bokobza, Yukihiro Ozaki

    11th European Symposium on Polymer Blends, 2012年03月, 英語, Donostia - San Sebastian, 国際会議

    ポスター発表

  • Crystal Structures and Thermal Behavior of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Studied by Infrared Spectroscopy and Wide Angle X-ray Diffraction

    Harumi Sato, Yukihiro Ozaki

    11th European Symposium on Polymer Blends, 2012年03月, 英語, Donostia - San Sebastian, Spain, 国際会議

    口頭発表(一般)

  • 時間分解SAXS/WAXDによるポリヒドロキシブタン酸の結晶化初期過程の研究

    佐藤 春実

    第1回FSBL研究発表会, 2011年11月, 日本語, 大阪国際会議場, 国内会議

    ポスター発表

  • Time-Resolved Synchrotron SAXS and WAXD Studies on Morphological Evolutions of Poly(3-hydroxybutyrate) during Isothermal Crystallization

    Harumi Sato, Yukihiro Ozaki, Longhai Guo, Nicolas Spegazzini, Takeji Hashimoto, Hiroyasu Masunaga, Sono Sasaki, Masaki Takata

    The 12th Pacific Polymer Conference (PPC12), 2011年11月, 英語, The Shilla Hotel, Jeju, Korea, 国際会議

    口頭発表(一般)

  • Raman Spectra of Styrene-Butadiene Rubber/Multiwall Carbon Nanotubes Nanocomposites,

    Harumi Sato, Xinlei Yan, Yasutaka Kitahama, Tamitake Itoh, Toshiaki Suzuki, Liliane Bokobza, Yukihiro Ozaki

    The 12th Pacific Polymer Conference (PPC12), 2011年11月, 英語, The Shilla Hotel, Jeju, Korea, 国際会議

    ポスター発表

  • Inter- and Intramolecular Hydrogen Bonding Change by Structural Formation of Gellan Gum studied by Vibrational Spectroscopy

    Takafumi Sakiyama, Harumi Sato, Kenji Kubota, Yukihiro Ozaki

    The 12th Pacific Polymer Conference (PPC12), 2011年11月, 英語, The Shilla Hotel, Jeju, Korea, 国際会議

    ポスター発表

  • Infrared Spectroscopy and Wide Angle X-ray Diffraction studies of Crystal Structures and Thermal Behavior of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)

    Harumi Sato, Yukihiro Ozaki

    The 12th Pacific Polymer Conference (PPC12), 2011年11月, 英語, The Shilla Hotel, Jeju, Korea, 国際会議

    口頭発表(一般)

  • A Raman Study on Intermolecular Interaction at the Interface of Polystyrene/ Carbon Nanotubes Nanocomposites,

    Takeshi Miyake, Harumi Sato, Yukihiro Ozaki

    The 12th Pacific Polymer Conference (PPC12), 2011年11月, 英語, The Shilla Hotel, Jeju, Korea, 国際会議

    ポスター発表

  • Terahertz Spectroscopy of Poly(3-Hydroxyalkanote)s

    Hiromichi Hoshina, Yusuke Morisawa, Harumi Sato, Isao Noda, Yukihiro Ozaki, Chiko Otani

    2011 IEEE CEIDP (IEEE CONFERENCE ON ELECTRICAL INSULATION AND DIELECTRIC PHENOMENA), 2011年10月, 英語, Hyatt Regency Cancun, Mexico, 国際会議

    ポスター発表

  • Isothermal crystallization of poly(3-hydroxybutyrate) studied by terahertz two-dimensional correlation Spectroscopy

    Hiromichi Hoshina, Shinya Ishii, Yusuke Morisawa, Harumi Sato, Isao Noda, Yukihiro Ozaki, Chiko Otani

    36th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz 2011), 2011年10月, 英語, Houston, USA, 国際会議

    口頭発表(一般)

  • Isothermal crystallization of poly(3-hydroxybutyrate) studied by terahertz time-domain spectroscopy

    Shinya Ishii, Hiromichi Hoshina, Yusuke Morisawa, Harumi Sato, Isao Noda, Chiko Otani

    36th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz 2011), 2011年10月, 英語, Houston, USA, 国際会議

    ポスター発表

  • Crystallization of Poly(3-Hydroxybutyrate) Studied by Terahertz Two-Dimensional Correlation Spectroscopy

    Hiromichi Hoshina, Shinya Ishii, Yusuke Morisawa, Harumi Sato, Isao Noda, Yukihiro Ozaki, Chiko Otani

    FACSS 2011, 2011年10月, 英語, Grand Sierra Resort, Reno, USA, 国際会議

    ポスター発表

  • 振動分光法を用いたジェランガムの構造形成と分子間・分子内水素結合の変化に関する研究

    崎山貴文, 佐藤 春実, 窪田健二, 尾崎幸洋

    第60回高分子討論会, 2011年09月, 日本語, 岡山大学, 国内会議

    ポスター発表

  • ラマン分光法を用いたポリマーナノコンポジットの界面における分子間相互作用の研究

    三宅 健, 佐藤春実, 尾崎幸洋

    第60回高分子討論会, 2011年09月, 日本語, 岡山大学, 国内会議

    口頭発表(一般)

  • ポリヒドロキシアルカン酸の結晶構造形成における弱い水素結合の役割

    佐藤春実, 尾崎幸洋

    第60回高分子討論会, 2011年09月, 日本語, 岡山大学, 国内会議

    公開講演,セミナー,チュートリアル,講習,講義等

  • テラヘルツ分光によるポリヒドロキシ酪酸の等温結晶成長の研究

    石井伸弥, 森澤勇介, 佐藤春実, 野田勇夫, 尾崎幸洋, 大谷知行, 保科宏道

    第72回応用物理学会学術講演会, 2011年09月, 日本語, 山形大学, 国内会議

    口頭発表(一般)

  • テラヘルツ二次元相関分光法によるポリマーの構造研究

    保科宏道, 森澤勇介, 石井伸也, 佐藤 春実, 野田勇夫, 尾崎幸洋, 大谷知行

    日本分光学会テラヘルツ分光部会シンポジウム,テラヘルツ分光の最前線V~バイオテラヘルツ分光~, 2011年09月, 日本語, パシフィコ横浜, 国内会議

    ポスター発表

  • テラヘルツ周波数領域におけるポリマーの二次元相関分光

    保科宏道, 石井伸弥, 森澤勇介, 佐藤春実, 野田勇夫, 尾崎幸洋, 大谷知行

    第72回応用物理学会学術講演会, 2011年09月, 日本語, 山形大学, 国内会議

    口頭発表(一般)

  • ラマン分光法を用いたポリマーナノコンポジットにおける界面の構造と物性

    佐藤春実, Yan Xinlei, 鈴木利明, 北濱 康孝, 尾崎 幸洋, Liliane Bokobza

    第57回高分子研究発表会, 2011年07月, 英語, 兵庫県民会館,神戸, 国内会議

    ポスター発表

  • Two dimensional correlation spectroscopy in terahertz frequency region

    Hiromichi Hoshina, Shinya Ishii, Yusuke Morisawa, Harumi Sato, Isao Noda, Yukihiro Ozaki, Chiko Otani

    THz Science and Tachnology ~The Castle Meeting~, 2011年07月, 英語, Schloss Rauischholzhausen, Marburg, Germany, 国際会議

    ポスター発表

  • Thermal Behavior and Phase Structures of Poly(3-hydroxybutyrate) and Poly(4-vinylphenol) Blends

    Longhai Guo, Harumi Sato, Takeji Hashimoto, Yukihiro Ozaki

    第57回高分子研究発表会, 2011年07月, 日本語, 兵庫県民会館、神戸, 国内会議

    口頭発表(一般)

  • Thermal Behavior and Lamella Structures of Poly(3-hydroxybutyrate-co-3- hydroxyvalerate) (P(HB-co-HV)) Studied by Infrared Spectroscopy

    Harumi Sato, Yukihiro Ozaki

    Sixth International Conference on Advanced Vibrational Spectroscopy (ICAVS-6), 2011年06月, 英語, Sonoma, California, 国際会議

    ポスター発表

  • Temperature-Dependent FT-IR Imaging Spectroscopy of Phase-Separation in a Poly(3-hydroxybutyrate)/Poly(L-lactic Acid) (50:50 wt.%) Blend

    Miriam Unger, Harumi Sato, Yukihiro Ozaki, Heinz Wilhelm Siesler

    Sixth International Conference on Advanced Vibrational Spectroscopy (ICAVS-6), 2011年06月, 英語, Sonoma, California, 国際会議

    ポスター発表

  • Raman Spectra of Styrene-Butadiene Rubber/Multiwall Carbon Nanotubes Nanocomposites

    Harumi Sato, Xinlei Yan, Yasutaka Kitahama, Tamitake Itoh, Toshiaki Suzuki, Liliane Bokobza, Yukihiro Ozaki

    Sixth International Conference on Advanced Vibrational Spectroscopy (ICAVS-6),, 2011年06月, 英語, Sonoma, California, 国際会議

    ポスター発表

  • Crystallization Behavior of Poly(3-hydroxybutyrate), Polycaprolactone and their Blend (50:50 wt.%) Studied by 2D FT-IR Correlation Spectroscopy

    Miriam Unger, Harumi Sato, Yukihiro Ozaki, Heinz Wilhelm Siesler

    Sixth International Conference on Advanced Vibrational Spectroscopy (ICAVS-6), 2011年06月, 英語, Sonoma. California, 国際会議

    ポスター発表

  • A TERS Study on Polymer Nanocomposites

    Toshiaki Suzuki, Xinlei Yan, Harumi Sato, Yasutaka Kitahama, Liliane Bokobza, Yukihiro Ozaki

    Sixth International Conference on Advanced Vibrational Spectroscopy (ICAVS-6), 2011年06月, 英語, Sonoma, California, 国際会議

    公開講演,セミナー,チュートリアル,講習,講義等

  • 赤外分光法によるジェランガムのゲル化に伴う分子間・分子内水素結合の変化に関する研究

    崎山貴文, 佐藤春実, 尾崎幸洋, 窪田健二

    第60回高分子学会年次大会, 2011年05月, 日本語, 大阪国際会議場, 国内会議

    ポスター発表

  • 振動分光法によるポリマーコンポジットの分子間相互作用の研究

    三宅 健, 佐藤 春実, 尾崎幸洋

    第60回高分子学会年次大会, 2011年05月, 日本語, 大阪国際会議場, 国内会議

    ポスター発表

  • ラマン分光法を用いたSBR/カーボンナノチューブナノコンポジットにおける界面の構造と物性

    佐藤 春実, Yan Xinlei, 鈴木利明, 北濱康孝, 尾崎 幸洋, Liliane Bokobza

    第60回高分子学会年次大会, 2011年05月, 日本語, 大阪国際会議場, 国内会議

    ポスター発表

  • テラヘルツ周波数領域における高分子構造の分光学的研究

    保科 宏道, 森澤 勇介, 佐藤 春実, 野田 勇夫, 尾崎 幸洋, 大谷 知行

    第60回高分子学会年次大会, 2011年05月, 日本語, 大阪国際会議場, 国内会議

    口頭発表(一般)

  • Two Dimensional Correlation Spectroscopy in Terahertz Frequency Region

    Hiromichi Hoshina, Yusuke Morisawa, Harumi Sato, Isao Noda, Yukihiro Ozaki, Chiko Otani

    International Congress on Analytical Sciences (ICAS) 2011, 2011年05月, 英語, Kyoto, Japan, 国際会議

    ポスター発表

  • Tip Enhanced Raman Scattering (TERS) Study of Styrene-Butadiene Rubber/Multiwall Carbon Nanotubes Nanocomposites

    Toshiaki Suzuki, Harumi Sato, Yasutaka Kitahama, Xinlei Yan, Tamitake Itoh, Xiaoxia Han, Liliane Bokobza, Yukihiro Ozaki

    International Congress on Analytical Sciences (ICAS) 2011, 2011年05月, 英語, Kyoto, Japan, 国際会議

    口頭発表(一般)

  • Spectroscopy of Poly(3-hydroxyalkanoate)s in Terahertz Frequency Region

    Hiromichi Hoshina, Yusuke Morisawa, Harumi Sato, Isao Noda, Yukihiro Ozaki, Hiroaki Minamide, Chiko Otani

    International Congress on Analytical Sciences (ICAS) 2011, 2011年05月, 英語, Kyoto, Japan, 国際会議

    口頭発表(一般)

  • Excitation Wavelength Dependence of Resonance Raman Spectra of Styrene-Butadiene Rubber/Multiwall Carbon Nanotubes Nanocomposites

    Xinlei Yan, Harumi Sato, Yasutaka Kitahama, Toshiaki Suzuki, Tamitake Itoh, Xiaoxia Han, Liliane Bokobza, Yukihiro Ozaki

    International Congress on Analytical Sciences (ICAS) 2011, 2011年05月, 英語, Kyoto, Japan, 国際会議

    ポスター発表

  • Crystal Structure, Thermal Behavior and Hydrogen Bonding Interactions of Biodegradable Polymer Poly(3-hydroxybutyrate) Blended with Poly(4-vinylphenol)

    Longhai Guo, Harumi Sato, Takeji Hashimoto, Yukihiro Ozaki

    第60回高分子学会年次大会, 2011年05月, 英語, 大阪国際会議場, 国内会議

    口頭発表(一般)

  • Crystallization Behavior of Poly(3-hydroxybutyrate) (PHB), Poly(ε-caprolactone) (PCL) and their Blend (50:50 wt.%) Studied by 2D FT-IR Correlation Spectroscopy

    Miriam Unger, Harumi Sato, Yukihiro Ozaki, Heinz W. Siesler

    International Congress on Analytical Sciences (ICAS) 2011, 2011年05月, 英語, Kyoto, Japan, 国際会議

    ポスター発表

  • Tip-enhanced Raman scattering studies on polymer thin films

    Yukihiro Ozaki, Harumi Sato, Yasutaka Kitahama, Toshiaki Suzuki, Isao Takahashi

    The 2010 International Chemical Congress of Pacific Basin Societies (Pacifichem2010), 2010年12月, 英語, Honolulu, Hawaii, USA, 国際会議

    ポスター発表

  • Specific crystal structure of poly(3-hydroxybutyrate) thin films studied by infrared reflection-absorption spectroscopy

    Harumi Sato, Yukihito Ozaki, Isao Takahashi

    The 2010 International Chemical Congress of Pacific Basin Societies (Pacifichem2010), 2010年12月, 英語, Honolulu, Hawaii, USA, 国際会議

    口頭発表(一般)

  • Infrared spectroscopy study on intermolecular interaction and phase separation of PS/PVME polymer blends

    Takeshi Miyake, Harumi Sato, Yukihiro Ozaki

    The 2010 International Chemical Congress of Pacific Basin Societies (Pacifichem2010), 2010年12月, 英語, Honolulu, Hawaii, USA, 国際会議

    ポスター発表

  • Higher Order Conformation of Poly(3-hydroxyalkanote)s Studied by Terahertz Time-Domain Spectroscopy

    Hiromichi Hoshina, Yusuke Morisawa, Harumi Sato, Isao Noda, Yukihiro Ozaki, Chiko Otani

    理研・分子研合同シンポジウム 第11回エクストリームフォトニクス研究, 2010年10月, 英語, 和光市, 国内会議

    ポスター発表

  • Higher Order Conformation of Poly(3-hydroxyalkanote)s Studied by Terahertz Time-Domain Spectroscopy

    Hiromichi Hoshina, Yusuke Morisawa, Harumi Sato, Isao Noda, Yukihiro Ozaki, Chiko Otani

    International Symposium on Frontier of Terahertz Spectroscopy IV -Innovations in THz Spectroscopy and THz-Wave Wireless Communications, 2010年10月, 英語, Matsumoto, Japan, 国際会議

    ポスター発表

  • Higher Order Conformation of Poly(3-hydroxyalkanote)s Studied by Terahertz Spectroscopy

    Hiromichi Hoshina, Yusuke Morisawa, Harumi Sato, Yukihiro Ozaki, Chiko Otani

    EOS Annual Meeting 2010 (EOSAM 2010), 2010年10月, 英語, Parc Floral de Paris, France, 国際会議

    口頭発表(一般)

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