文献类型：期刊文献

中文题名：聚苯撑苯并二噻唑的甲基磺酸溶液的相转变过程及其动力学研究

英文题名：STUDY ON KINETICS AND PROCESS OF PHASE TRANSITIONS OF LYOTROPIC LIQUID CRYSTALLINE POLYMER PBZT/MSA

作者：吴平平[1,2];孙福革[1,2];廖兵[1,2];李水强[1,2]

机构：[1]华东化工学院高分子材料系,上海邮政编码200237;[2]中国科学院科技大学结构分析开放研究实验室,合肥邮政编码230026

年份：1992

卷号：2

期号：2

起止页码：136

中文期刊名：高分子学报

外文期刊名：Acta Polymerica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心1992】；CSCD:【CSCD2011_2012】；

基金：863资助项目

语种：中文

中文关键词：液晶;液晶高分子;PBT/MSA;相转变

外文关键词：Poly(p-phenylene benzobisthiazole) (PBZT), Lyotropic liquid crystalline polymer, Kinetics, Phase transition

摘要：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 phase transitions from nematic mesophase to isotropic state (N-I) and from isotropic state to nematic mesophase (I-N) of the poly (P-phenylene benzobisthiazole)-methyl sulfonic acid solution (PBZT/MSA) have been studied by depolarized light intensity and polarized microscopy.It was found that the phase transition temperature is a function of theconcentration of PBZT/MSA. The atructural long range order of PBZT/MSA induced by shearing can been enhanced by increasing temperature.The study of kinetics of I-N phase transition shows that the transition is nucleation controlled which can be described by an Avrami equation. The Avrami exponent is about 1 which suggests the nucleation is followed by rodlike growth.The results show that the depolarized light intensity is a simple and an effective method for study of the process and the kinetics of phase transitions of liquid crystalline polymers, especially for lyotropic liquid crystalline polymers.