• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Molecular design of cellulosic thermotropic liquid crystals

Research Project

Project/Area Number 07456080
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 林産学
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

NAKATSUBO Fumiaki  Kyoto Univ., Faculty of Agriculture, Professor, 農学部, 教授 (10027170)

Co-Investigator(Kenkyū-buntansha) MINATO Kazuya  Kyoto Univ., Faculty of Agriculture, Associate Professor, 農学部, 助教授 (10026601)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥6,600,000 (Direct Cost: ¥6,600,000)
Fiscal Year 1996: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1995: ¥5,100,000 (Direct Cost: ¥5,100,000)
Keywordscellulosic liquid crystal / regiospecific substituted derivatives / ring-opening polymerization / substituent effect / 2-propyl cellulose / 2-allkyl cellulose / 2-acyl cellulose / solubility and themal behavior / 内部可塑剤 / 主鎖型液晶ポリマー / 流動複屈折現象 / 側鎖型液晶ポリマー / 開環重合法 / セルロースの化学合成 / 構造-物性相関
Research Abstract

From the results of this former research period, it was found that it is indispensable to establish the synthetic method for cellulose for investigating the relationship between structure and property of cellulosic liquid crystals. At present, the regiospecific introduction of the desired functional groups into the 2-or 3-position of cellulose is impossible, but this may be possible by the chemical synthetic method of cellulose. We established the chemical synthetic method cellulose in last year. In this year, we first of all investigated the substituent effect on the polymerization to clarify the reaction mechanism. It was found that 3-O-benzyl group is indispensable for the stereo-and regioregularity, and 2-O-pivaloyl group for regiospecific polymerization. We also succeeded in the stepwise synthesis of celloeicosaose with DP 20. Thus, the method yielding regiospecific substituted cellulose derivatives was established. Then, 2-propyl cellulose was first synthesized as an example. Consequently, it is indicated that the present synthetic method is useful for getting 2-O-alkyl and, probably, also 2-acylated cellulose derivatives. The solubility and thermal behavior of 2-propyl cellulolse were examined resulting several interesting findings. Thus the method for accumulating basic knowledge about cellulosic liquid crystalline properties was established.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] Hiroshi Kamitakahara: "Substituent effect on ring-opening polymerization of regioselective acylated a-D-glucose 1, 2, 4-orthopyvalate derivatives" Macromolecules. 29(19). 6126-6131 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Takeshi Nishimura: "First synthesis of cellooctaose by a convergent synthetic method" Carbohydr. Res.294. 53-64 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Takeshi Nishimura: "First stepwise synthesis of cellulose analoges" Tetrahedron Lett.37(51). 9215-9218 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Michiko Hori: "Substituent effects of orthoester group on ring-opening polymerization of a-D-glucose 1,2,4-orthoester derivatives" Macromolecules accepted.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Takeshi Nishimura: "Chemical synthesis of cellulose derivatives by a convergent synthetic method and their several properties" Cellulose accepted.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Hiroshi Kamitakahara: "Substituent effect on ring-opening polymerization of regioselective acylaed alpha-D-glucose 1,2,4-orthopyvalate derivatives" Macromolecules. 29-19. 6126-6131 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Takeshi Nishimura: "First synthesis of cellooctaose by a convergent synthetic method" Carbohydr. Res. 294. 53-64 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Takeshi Nishimura: "First stepwise synthesis of cellulose analogs" Tetrahedron Lett. 37-51. 9215-9218 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Michiko Hori: "Substituent effects of orthoester group on ring-opening polymerization of alpha-D-glucose 1,2,4-orthoester derivatives" Macromolecules. (accepted).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Nishimura: "Chemical synthesis of cellulose derivatives by a convergent synthetic method and their several properties" Cellulose. (accepted).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Hiroshi Kamitakahara: "Substituent effect on ring-opening polymerization of regioselective acylated α-D-glucose 1,2,4-orthopyvalate derivatives" Macromolecules. 29・19. 6126-6131 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Takeshi Nishimura: "First synthesis of cellooctaose by a convergent synthetic method" Carbohydr.Res.294. 53-64 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Takeshi Nishimura: "First stepwise synthesis of cellulose analoges" Tetrahedron Lett.37・51. 9215-9218 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Michiko Hori: "Substiutent effects of orthoester group on ring-opening polymerization of α-D-glucose 1,2,4-orthoester derivatives" Macromolecules. (accepted).

    • Related Report
      1996 Annual Research Report
  • [Publications] Takeshi Nishimura: "Chemical synthesis of cellulose derivatives by a convergent synthetic method and their several properties" Cellulose. (accepted).

    • Related Report
      1996 Annual Research Report
  • [Publications] Hiroshi Kamitakahara: "Substituent Effect on Ring-Opening Plolymerization of Regioselectively Acylated 1,4-Anhydro-α-D-glucopyranose Derivatives" Macromolecules. 29. 1119-1122 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Fumiaki Nakatsubo: "Cationic Ring-Opening Polymerization of 3,6-Di-O-benzyl-α-D-glucose 1,2,4-Orthopivalate and the First Chemical Synthesis of Cellulose" J. Am. Chem. Soc.118. 1677-1681 (1996)

    • Related Report
      1995 Annual Research Report

URL: 

Published: 1995-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi