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自从高强度高模量的Kevlar纤维作为溶致性液晶高分子问世以来,液晶高分子的研究引起了人们的极大兴趣,并受到世界各国的重视。近年来,热致液晶性芳族聚酯的研究是一个极其活跃的领域。由于其本体熔流状态呈现出排列规整的液晶性能,因此可望采用较为简单的熔融加工工艺,开发出新型高强高模的高分子材料。但由于合成复杂和价昂这些众所周知的原因,大部分仍局限于理论上的研究。本文以4,4’-(烷基二酰氧)二苯甲酰氯和4,4’-二羟基联苯为单体,采用溶液缩聚方
Since the advent of high-strength and high-modulus Kevlar fibers as a lyotropic liquid crystal polymer, the research of liquid crystal polymers has drawn great interest and been valued by all countries in the world. In recent years, the research of thermotropic liquid crystalline aromatic polyesters is an extremely active field. Due to the fact that the bulk flow state presents a regular liquid crystal property, it is expected to adopt a simpler melt processing technology to develop a new high-strength and high-modulus polymer material. However, due to the well-known causes of complex and expensive synthesis, most are still limited to theoretical studies. In this paper, 4,4 ’- (alkyldioxo) dibenzoyl chloride and 4,4’-dihydroxybiphenyl monomer, using solution polycondensation side