在高模量、高强度及耐高温的高分子材料中,热致性液晶高分子有着极为引人注目的开发前景。对这类高分子化合物,各向同性转变温度T_(NI)及其热焓差△H_(NI)是十分重要的参数。前者常用以表征液晶化合物的稳定性,后者则可表征其液晶结构的有序程度。分子结构对液晶高分子转变的影响,已有不少报道,关于热历史的作用则尚未见到系统的研究。本文用 In the high modulus, high strength and high temperature polymer materials, thermotropic liquid crystal polymer has a very attractive development prospects. For such macromolecular compounds, the isotropic transition temperature T_ (NI) and the enthalpy difference △ H_ (NI) are very important parameters. The former is often used to characterize the stability of liquid crystal compounds, the latter can characterize the degree of order of its liquid crystal structure. The molecular structure of the impact of liquid crystal polymer change, there have been many reports on the role of thermal history has not yet seen a systematic study. This article use