A Novel High Performance Aromatic Polyamide Fiber(I)-Optically Anisotrople Aramid Dope and Phase Diagram-

새로운 고성능 방향족 폴리아미드 섬유(I) -광학적 이방성 아라미드 도우프 및 상평형도-

  • O, Tae-Jin (Dept. of Dyeing and Finishing, College of Engineering, Kyungpook National University) ;
  • Han, Seon-Ju (Dept. of Dyeing and Finishing, College of Engineering, Kyungpook National University)
  • 오태진 (경북대학교 공과대학 염색공학과) ;
  • 한선주 (경북대학교 공과대학 염색공학과)
  • Published : 1996.09.01

Abstract

Para-linked aromatic polyamide having cyano substituent group, poly(4,4'-diamino-2'-cyanobenzanilide-terephthalamide) was synthesized by solution polymerization of 4,4'-diamino-2'-cyano-benzanilide with terephthaloyl chloride in a polar organic solvent, which formed lyotropic liquid crystal in polar organic solvent such as dimethylacetamide(DMAc) and N-methyl pyrrolidone(NMP) containing inorganic salt such as LiCl and CaCl Its polymerization behavior as a function of polymerization time, concentration of monomer and LiCl as well as its optical anisotropy and critical concentration forming anisotropic solution as a function of LiCl concentration and inherent viscosity were investigated. A novel optically anisotropic aramid dope was prepared by the addition of equimolar amount of to the thick gel-like solid obtained during polymerization; the sudden change in bulk viscosity of the dope as a function of polymer concentration was observed and it, therefore, indicates characteristics of typical an-isotropic solution.

Keywords

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