New Semi-Rigid Polyesters Contsining 2,5-Diphenyl-1,3,4-thisdiszole as a Mesogen.

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  • SATO Moriyuki
    Department of Material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University
  • TAKEUCHI Susumu
    Department of Material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University

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Other Title
  • ２，５‐ジフェニル‐１，３，４‐チアジアゾールをメソゲンとする新しい半剛直型ポリエステル
  • 2 5 ジフェニル 1 3 4 チアジアゾール オ メソゲン ト スル アタラシイ ハンゴウチョクガタ ポリエステル

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Abstract

New semi-rigid polyesters were synthesized by high temperature solution polycondensation from a diacid chloride of terphenyl analogue, (2, 5-diphenyl-1, 3, 4-thiadiazole), which has central 1, 3, 4-thiadiazole and benzene rings at both the sides, and aliphatic diols. The polymers obtained were insoluble in most of the organic solvents expect dichloroacetic acid and trifluoroacetic acid. DSC measurements and polarizing microscope observations of textures indicated that polyesters having longer aliphatic chains (m=9, 10, 12) form thermotropic smectic phases, but those with shorter aliphatic chains (m=6, 8) decompose without showing clear liquid crystalline phases.

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 56 (4), 260-263, 1999

    The Society of Polymer Science, Japan

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