Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
권호 표지

Preparation and Properties of Thermotropic Liquid Crystalline Copolymers Containing Amide Linkage (I)

아미드기를 가진 열방성 백정고분자의 제조 및 물성 (I)

  • 김한도 (부산대학교 공과대학 섬유공학과) ;
  • 구영석 (부산대학교 공과대학 섬유공학과, 부산대학교 공과대학 섬유공학과, 동서 공과대 학교 화학공학과, 부산대학교 공과대학 고분자공학과)
  • Published : 1994.01.01

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Abstract

A series of thermotropic liquid crystalline(LC) copolymers based on p-acctoxybcnzoic acid(p-ABA)/terephthalic acid(TPA)/low inherent viscosity(IV) PET/Melton/2.7- diacetoxynaphthalene(2.7-DAU) was prepared by melt polymerization. The compositions of these monomers in the LC-copolyesters were varietal as a means of manipulating inherent viscosity and properties. Highly anisotropic melts were observed indicating the presence of nematic rnesophase. The thermotropic liquid crystalline copolymer exhibited a well tleveloped and highly oriented fibrillar structure. Copolymers with inherent viscosities of 0.6~1.9 that were processiblic in the temperature range of 200~23$0^{\circ}C$ were obtained. The degradation temperature decreased with increasing amide unit content. The composition of PET/Melton affected the glass trailsition of LC-copolymers insignificantly, however, the glass transition temperatures depended on the total composition of the LC-copolymers significantly.

Keywords

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