KINETICSOF TRANSITION FROM ISOTROPIC TO CHOLESTERIC PHASE FOR A THERMOTROPIC CELLULOSE DERIVATIVE  

作　　者：陈寿羲 孙震 宋文辉 金永泽 黄勇 

机构地区：[1]Institute of Chemistry, Academia Sinica, Beijing 100080 [2]Guangzhou Institute of Chemistry, Academia Sinica, Guangzhou 510650

出　　处：《Chinese Journal of Polymer Science》1996年第1期86-90,共5页高分子科学（英文版）

基　　金：This work supported by the National Basic Research Project-Macromolecular Condensed State

摘　　要：The kinetics of mesophase formation of a thermotropic hydroxyethyl cellulose acetate from isotropic phase to cholesteric mesophase has been studied by means of depolarizing transmittance method. Avrami type analysis of the data gives an exponent n close to 1, which suggests the nucleation followed by rod-like growth. It means that the kinetic behavior of phase transition from isotropic to cholesteric mesophase is very similar to that of the mesophase formation from isotropic to nematic mesophase.The kinetics of mesophase formation of a thermotropic hydroxyethyl cellulose acetate from isotropic phase to cholesteric mesophase has been studied by means of depolarizing transmittance method. Avrami type analysis of the data gives an exponent n close to 1, which suggests the nucleation followed by rod-like growth. It means that the kinetic behavior of phase transition from isotropic to cholesteric mesophase is very similar to that of the mesophase formation from isotropic to nematic mesophase.

关 键 词：kinetics phase transition cholesteric mesophase hydroxyethyl cellulose acetate 

分 类 号：O636.1[理学—高分子化学]