Effect of Geometric Isomers Ratio on the Structure and Properties of Polyamides Containing 1, 3-Cyclohexane Rings

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  • １，３‐置換のシクロヘキサン環を含むポリアミドの構造と物性に及ぼす異性体比の影響
  • 1 3 チカン ノ シクロヘキサンカン オ フクム ポリアミド ノ コウゾウ

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Abstract

The effect of geometric isomers of 1, 3-cyclohexanebis (methylamine) (1, 3-CBMA) on the structure and properties of the polymers derived by the polycondensation of each diamine with adipic acid (6) was studied. The cis and trans isomers of the diacid salts of the diamine were obtained by recrystallizing cis/trans mixed salt from the solution and were polymerized. The polyamide with 97.4% cis residue was highly crystalline and melted at 253°C, while the polyamide with 93.3% trans residue was amorphous. The glass transition temperatures of these polymers were not so much different each other. They were 97 and 84°C for the polyamides with 97.4% cis and 93.3% trans residues, respectively. These results show that the chain conformation which is concerned with crystallinity and melting point is markedly influenced by the isomer, but the chain mobility which is related to glass transition temperature is not so much influenced.

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 36 (5), 305-310, 1979

    The Society of Polymer Science, Japan

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