芳香族ポリアミドフィルムの構造解析

DOI

書誌事項

タイトル別名
  • Structural Analysis of Poly(p-phenylene terephthalamide) Films from Liquid Crystalline Solutions.

抄録

Poly (p-phenylene terephthalamide) (PPTA) films were formed from a liquid crystalline sulphuric acid solution using water as a coagulant. The polymer dope with optical anisotropy was cast on a flat plate. The phase transition from the optical anisotropy to isotropy was accomplished by means of controlling temperature and humidity, and then the cast dope was immersed in a coagulation bath. When the film was dried at room temperature after the coagulation without any dimensinal restrictions, crytallites in the film were randomly oriented. The (010) reflection of the type II modification of the PPTA crystal was hardly found in the X-ray diagram of the film. When the drying at room temperature was carried out with constant dimensions, the film showed the (0k0) planar orientation of the type II crystal. If the film was annealed at higher temperatures, the II crystal was transformed to the type I crystal and the film orientation changed at the same time towards the (h00) planar orientation. A never-dried film exhibited very low crystallinity and random orientation. The drying process with dimensional restrictions proves to be an important factor in both generating the type II crystal and forming the planar orientation.

収録刊行物

  • 高分子論文集

    高分子論文集 51 (11), 745-751, 1994

    公益社団法人 高分子学会

詳細情報 詳細情報について

  • CRID
    1390282681499239168
  • NII論文ID
    130004034964
  • DOI
    10.1295/koron.51.745
  • ISSN
    18815685
    03862186
  • 本文言語コード
    ja
  • データソース種別
    • JaLC
    • Crossref
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

問題の指摘

ページトップへ