液晶性アシル化エチルセルロースの合成とキャラクタリゼーション  [in Japanese] Synthesis and Characterization of Liquid-Crystalline Acylated Ethylcelluloses  [in Japanese]

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Abstract

Ethy1cellulose (EC) exhibits interesting behavior in the formation of liquid crystals. Early observations indicated that most cellulosics formed right-handed cholesteric structure. However, EC in chloroform and acetic acid (AA) solutions took left-handed cholesteric liquid crystals, whereas EC in dichloroacetic acid (DCA) solution had right-handed ones. In the present study, (phenylacetyl)ethylcellulose (PA-EC) was prepared by the reaction of phenylacetyl chloride with EC having a degree of ethyl substitution (DSEt) of 2.26 in N,N-dimethylacetamide solution using triethylamine as proton scavenger. Reactions were usually carried out at room temperature for one week, which provided a variety of phenylacetyl contents (degree of substitution of phenylacetyl (DSPa) = 0.02, 0.11, 0.32, and 0.43). The chloroform and AA solutions of PA-EC with DSPa = 0.32 displayed a right-handed cholesteric liquid crystalline phase, while the DCA solution showed a left-handed one.

Journal

  • 福井工業大学研究紀要 Memoirs of Fukui University of Technology

    福井工業大学研究紀要 Memoirs of Fukui University of Technology (43), 284-292, 2013

    福井工業大学

Codes

  • NII Article ID (NAID)
    120005301143
  • Text Lang
    JPN
  • Article Type
    Departmental Bulletin Paper
  • Journal Type
    大学紀要
  • ISSN
    1884-4456
  • NDL Article ID
    024731064
  • NDL Call No.
    YH247-935
  • Data Source
    NDL  IR 
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