Hydrolysis of Polyamic Acids with Micro-Moisture.

DOI Web Site
  • MATSUMOTO Kiyoichi
    Department of Polymer Science and Engineering, Faculty of Textile Science, Kyoto Institute of Technology
  • SAITOH Hiroyuki
    Department of Polymer Science and Engineering, Faculty of Textile Science, Kyoto Institute of Technology

Bibliographic Information

Other Title
  • ポリアミック酸の微量水分による加水分解
  • ポリアミックサン ノ ビリョウ スイブン ニ ヨル カスイ ブンカイ

Search this article

Description

It is not always easy to keep moisture away during film formation from dope of polyamic acids. Two kinds of Kapton and Upilex-S types of polyimide were made from dope of polyamic acid; the rates of hydrolysis caused by micro-moisture in these dopes were determined. The relationships for dopes with no water or 1 vol% water were well fitted by an Arrhenius type equation: log [(1/P) - (1/P0)] t-n=(A/T+B). So the apparent activation energy of hydrolysis for no water or 1 vol% water in the two types of dope of polyamic acid is 16-17 kcal/mol on non-water and 18-20 kcal/mol on 1 vol% water content. The concentrated dope from which the film were prepared showed Bingham's flow. The viscosity which dopes included no or 1 vol% water was increased with increasing degree of polymerization of polyamic acid.

Journal

  • KOBUNSHI RONBUNSHU

    KOBUNSHI RONBUNSHU 48 (11), 711-717, 1991

    The Society of Polymer Science, Japan

Keywords

Details 詳細情報について

Report a problem

Back to top