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Fundamental Studies on Thermotropic Cholesteric Liquid Cryatals of Cellulose Derivatives with Flexible Substituents.

Research Project

Project/Area Number 61550662
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 高分子物性
Research InstitutionKyoto University

Principal Investigator

MIYAMOTA Takeaki  Inst. Chem. Res., Kyoto Univ. Assoc. Prof., 化学研究所, 助教授 (60027050)

Co-Investigator(Kenkyū-buntansha) SUZUKI Hidematsu  Inst. Chem. Tes., Kyoto Univ. Instructor, 化学研究所, 助手 (00027054)
ASDA Tadahiro  Faculty of Eng., Kyoto univ. Assoc. Prof., 工学部, 助教授 (10025934)
Project Period (FY) 1986 – 1987
Project Status Completed (Fiscal Year 1987)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1987: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1986: ¥1,700,000 (Direct Cost: ¥1,700,000)
KeywordsCellulose Derivatives / Thermotropic Mesophase Formation / Flexible Substituents / Hydrophobic alkyl Chains / コレステリック液晶 / セルロース / ハイドロキシエチルセルロース / ヒドロキシプロピルセルロース / 長鎖アルキル基 / 結合様式
Research Abstract

The purpose of this research project is to elucidate the effect of substituents on thermotropic behavior of cellulose derivatives. To this end, four series of derivatives were prepared: (i) cellulose ethers with polyethyleneoxy chains, (ii) tri-O-alkylcalluloses with alkyl substituents ranging form ethyl to decyl, (iii) cellulose triacylates from propionate to palmitate, and (iv) acylates fo hydroxyethyl cellulose(HEC). The thermal behavior was examined by polarizing microscope, X-ray diffraction, CD and DSC.
It was found that (i) an increase of the length of flexible substituents allowa all series of cellulose derivatives to assume thermotropic mesophases, (ii) hydrophilic polyethyleneoxy chains are more responsible for the thermotropic mesophase formation of cellulose derivatives than hydrophobic alkyl chains and (iii)the thermotropic mesophase formation strongly depends not only on the chemical structure of substituents but also on the type of linkage such as ether, ester and amide linkages by which the substituents are appended to cellulose backbone. The results on cholesteric mesophase properties were also discussed in terms ofthe structural nature of substituents.

Report

(2 results)
  • 1987 Final Research Report Summary
  • 1986 Annual Research Report
  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] 宮本武明: 繊維学会誌. 42. 25-30 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Takeaki Miyamoto,et al.: Journal of Polymer Science,Polymer Chemistry. 24. 2981-2993 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Takeaki Miyamoto,et al.: Journal of Polymer Science,Polymer Chemistry. 25. 987-994 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Takeaki Miyamoto,et al.: Polymer Journal.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 浅田忠裕ら: 日本化学繊維研究所講演集. 44. 45-50 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Tadahiro Asada,et al.: Mol.Cryst.Liq.Cryst.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] T. Miyamoto et al.: "^<13>C-NMR Spectral Studies on the Distribution of Substituents in Some Cellulose Derivatives." J. Polym. Sci. Polym. Chem.Ed.24. 2981-2993 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] T. Miyamoto et al.: "Relationship between Distribution of Substituents and Water Solubility of Tri-O-Methyl Cellulose." J. Polym. Sci. Polym. Chem. Ed.25. 987-994 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] T. Miyamoto: "Functionalization of Cellulose: Recent Trends." Paper & Its Surrounding Hi-Technology. 3. 33-38 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] T. Miyamoto et al.: "Thermotropic Cellulose Derivatives with Flexible Substituents. I. Thermotropic Behavior of Tri-O-Alkylcelluloses." Polymer Journal.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] T. Miyamoto et al.: "Thermotropic Cellulose Derivatives with Flexible Substituents. II Thermotropic Behavior of Cellulose Ethers with Polyethleneoxy Chains." Polymer Journal.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 宮本武明: 繊学分誌. 42. 25-30 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] Takeaki Miyamoto,et al.: Journal of Polymer Science:Polymer Letters. 24. 495-501 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] Takeaki Miyamoto,et al.: Journal of Polymer Science:Polymer Chemistry Edition. 24. 2981-2993 (1986)

    • Related Report
      1986 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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