Synthesis of Polyamides by Direct Polycondensation Using Thionyl Chloride as Condensing

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  • UEDA Mitsuru
    Department of Polymer Chemistry, Faculty of Engineering, Yamagata University
  • KAWAHARASAKI Naomi
    Department of Polymer Chemistry, Faculty of Engineering, Yamagata University
  • TAKEDA Masahiro
    Department of Polymer Chemistry, Faculty of Engineering, Yamagata University

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Other Title
  • 縮合試薬として塩化チオニルを用いる直接重縮合反応によるポリアミドの合成　　重合条件の検討
  • シュクゴウ シヤク ト シテ エンカ チオニル オ モチイル チョクセツ ジュ

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Description

In a model reaction of benzoic acid (II) with aniline (III) using thonyl chloride (I) as a condensing agent under the presence of N-methylpyrrolidone (NMP), hexamethylphosphoramide (HMPA), or a mixture of pyridine and NMP, benzanilide (IV) was formed rapidly in high yield. A direct polycondensation of isophthalic acid (Va) with aromatic diamines (VI) using (I) was studied. Polyamides (VII) with inherent viscosities up to 0.77 dl·g-1 were obtained in the same solvent systems as used in the above model reaction, and those up to 0.9 dl·g-1 in pyridine containing alkaline halide, such as LiCl, which was added in the course of polycondensation. Polyamides of relatively high molecular weight were also obtained from aliphatic dicarboxylic acids (V) and (VI) in HMPA with this reaction.

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 41 (5), 261-265, 1984

    The Society of Polymer Science, Japan

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