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用退偏振光强度法及偏光显微镜研究了溶致性液晶高分子聚苯撑苯并二噻唑的甲基磺酸溶液(PBT/MSA)由液晶相至各向同性相(N→I转变),及由各向同性相至液晶相(I→N转变)的相变过程.液晶相的形成(I→N)服从Av-rami方程,Avrami指数为1左右,表明该体系的液晶相是以一维棒状方式形成的.相转变温度与浓度有关,提高温度可加速在应力下液晶相长程有序结构的形成.
The degenerated light intensity method and polarized light microscope were used to study the phase transition from liquid crystal phase to isotropic phase (N → I transition) of the solution of methylbenzene sulfonic acid solution (PBT / MSA) And the phase transition from isotropic phase to liquid crystal phase (I → N transition) .The formation of liquid crystal phase (I → N) obeys Av-rami equation and the Avrami index is about 1, indicating that the liquid crystal phase of the system is a Dimensional rod-like manner.The phase transition temperature is related to the concentration, and increasing the temperature can accelerate the formation of long-range ordered structure of the liquid crystal phase under stress.