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高分子固体の高次組識と力学的および電気的物性・機能との相関

Research Project

Project/Area Number 03205088
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Research InstitutionOsaka University

Principal Investigator

小林 雅通  大阪大学, 理学部, 教授 (40028147)

Co-Investigator(Kenkyū-buntansha) 金子 文俊  大阪大学, 理学部, 助手 (70214468)
田代 孝二  大阪大学, 理学部, 講師 (60171691)
Project Period (FY) 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1991: ¥2,000,000 (Direct Cost: ¥2,000,000)
Keywords超延伸・高弾性率繊維 / 結晶モリフォロジ- / 遷移双極子相互作用 / ポリオキシメチレン / 分子運動 / 結晶弾性率 / 強誘電性液晶 / 相転移
Research Abstract

高分子固体の力学物性に及ぼす高次組織および分子運動の影響を定量的に評価する研究の一環として,結晶モルフォロジ-に大きく依存する赤外バンドの波数及び形状変化に着目してこの現象の分子機構を解明すると共に結晶モルフォロジ-評価の新しい分光学的手法を開拓した。また高分子結晶における熱的揺動の性質とそれによって生ずる結晶弾性率の低下について考察した。既にポリオキシメチレン(POM)など一連の高分子についてモルフォロジ-が伸び切り鎖晶からラメラ晶に移る際に分子鎖軸方向に遷移モ-メントを持つ赤外平行バンドが高波数側に大きくシフトしその形状も変化することを示したが,赤外バンドの振動子強度の絶対値側定と理論的考察によってこの極めて特異的なスペクトル変化は高分子結晶の形状とサイズに大きく依存する遷移双極子相互作用によって引き起されることを明らかにした。また平行バンドのプロフィル解析によって結晶モルフォロジ-を定量的に評価できることを示した。POM繊維の結晶弾性率は分光学的手法で求めた理論弾性率に比べて小さく,特に室温以上では理論値の50%程度に減衰する。これは結晶領域における分子鎖の回転的揺動によるものと考え、ラマンバンド幅の温度依存性を2種の力学モデル(siteーhoppingとBibrationーtorsionモデル)に基いて解析し,分子運動に関する種々の力学パラメタ-を求めてPOMの力学的および熱力学的性質との関連性について考察した。
電気的物性に関しては強誘電性液晶における高分子効果を解明する目的で,低分子液晶(M1)とそれを側鎖に有する高分子液晶(P1)について多形構造と相転移挙動を比較考察した。P1において側鎖のmesogenが構成する層状構造はスメクチック相においてもM1の場合に比べて高い規則性を保つことが明らかとなった。

Report

(1 results)
  • 1991 Annual Research Report
  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] M. Kobayashi: "MorphologyーDependent Anomalous Ferquency Shifts of Infrared Absorption Bands of Polymer Crystals:Interpretation in Terms of Transition DipoleーDipole Coupling theory" J. Chem. Phys.96. 748-760 (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] K. Tashiro: "Theoretical Evaluation of threeーDimensional Elastic Constants of Native and Regenerated Celluloses:Role of Hydrogen Bonds" Polymer. 32. 1516-1526 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] K. Tahiro: "Vibrational Spectroscopic Study on Ferroelectric Phase Transition of Vinylidene FluorideーTrifluoroethylene Copolymers:2. Temperature Dependences of the FarーInfrared Absorption Spectra and Ultrasonic Velocity" Polymer. 32. 1017-1026 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] K. Tashiro: "LatticeーDynamical Prediction of the Limiting Young's Modulus of Liquid Crystalline Arylate Polymers;Comparison with typical RigidーRod Polymers" Polymer. 32. 454-463 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] M. Kobayashi: "Infrared and Raman Spectra of Macrocyclic Poly(oxymethylene)" Macromolecules. 24. 4796-4800 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] K. Tashiro: "Theoretical Young's Moduli of Poly(pーphenylenebenzobisthiazole)and Poly(pーphenylenebenzobisoxazole)" Macromolecules. 24. 3706-3708 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] T. Nakaoki: "Conformational Order in Crystalline States and Gels of Syndiotactic,Isotactic and Atactic Polystyrenes studied by Vibrational Spectroscopy" J. Mol. Struct.242. 315-331 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] J. Hou: "Xーray Structure Analyses and Vibrational Spectral Measurements of the Model compounds of the LiquidーCrystalline Arylate Polymers. 2.Structural Isomorphism in a Series of Model Compounds" J. Phys. Chem.95. 9561-9568 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] H. Hase: "Raman Study of Ethanol and Ethanlic Solutions of LiCl at Low Temperature" J. Phys. Chem.95. 8541-8546 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Y. Itoh: "Brillouin Scattering Studies on Polytypes of Stearic Acid B Form" J. Phys. Chem.95. 1794-1799 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] K. Tashiro: "Structure and Thermochromic SolidーState Phase Transition of Poly(3ーalkylthiophene)" J. Polym. Sci.,Part B Polym. phys.29. 1223-1233 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] K. Tashiro: "Structural Changes Occurring in the Phase transition of Ferroelectric Liquid Crystals[1]Temperature Dependence of the Xーray Diffraction and FtIR/Raman SPectra" Mol. Cryst. Liq. Cryst.200. 571-574 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] K. Tashiro: "Structural Changes in the thermochromic SolodーState Phase Transition on Poly(3ーalkylthiophene)" Synthetic Metals. 41ー43. 571-574 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] M. Kobayashi: "MorphologyーDependent Anomalous Frequency Shifts of IR Bands in Polar Polymer Crystals:Polytetrafluoroethylene" ReP. Progr. Polym. Phys. Jpn.34. 347-350 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] M. Kobayashi: "Molecular Motion in Trigonal Poly(oxymethylene)revealed by Vibrational Spectroscopy" Rep. Progr. Polym. Phys.Jpn.34. 351-354 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] T. Nakaoki: "Vibrational Spectra of Two Crystal Modifications of Syndiotactic Polystyreneーd_8" Rep. progr. Polym. Phys. Jpn.34. 355-358 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] T. Nakaoki: "Physical Gelation of Epimerized Polystyrenes" Rep. Progr. Polym.Phys. Jpn.34. 359-362 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] F. Kaneko: "Vibrational Spectroscopic Study on Crystal Growth of Stearic Acid B and E Forms" Rep. Progr. Polym. Phys. Jpn.34. 363-366 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] F. Kaneko: "Vibrational Spectroscopic Study on Mechanism of Solid State Phase Transitions of cisーUnsaturated Fatty Acids:Erucic Acid γ1→α1" Rep. Progr. Polym. Phys.Jpn.34. 367-370 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] K. Sato and M. Kobayashi: "Crystals 13" SpringerーVerlag, 41 (1991)

    • Related Report
      1991 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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