光致变色液晶高分子研究（Ⅲ）──含胆甾介晶基元和偶氮苯光色基元侧链共聚硅氧烷的液晶行为  

Studies on Photochromic Liquid Crystalline Polymers (Ⅲ)──Liquid Crystalline Behavior of Side-Chain Copolysiloxanes Containing Cholesteric Mesogens and Azobenzene Photochromic Groups

作　　者：张其震[1] 王艳[1] 侯建安[1] 徐懋[1] 

机构地区：[1]山东大学化学系,山东大学环境科学中心,中国科学院化学研究所

出　　处：《高等学校化学学报》1994年第8期1240-1243,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金;中国科学院高分子物理联合开放实验室(化学所)科学基金

摘　　要：用热台偏光显微镜、Ｘ射线衍射和ＤＳＣ研究了含胆甾介晶基元和偶氮苯光色基元侧链共聚硅氧烷（ＰＳＩ）的液晶性．将非介晶基元并入液晶均聚物，所得共聚物的液晶态类型不变，仍显示近晶型织构，在ＰＳＩ共聚物中，保持液晶性的含介晶基元单体的最低极限组成为６０ｍｏｌ％．在液晶性存在的范围内，共聚物的清亮点由１３０℃升至１７０℃，液晶共聚物的热稳定性随非介晶组分含量的增加而增强．The liquid crystalline properties of side-chain copolysiloxanes containing cholesteric mesogens and azobenzene photochromic groups were characterized by polarized microscopy with a hot stage (POM), DSC and WAXD. On incorporation of nonmesogenic units into LC polysiloxane the type of mesophase is not changed and smectic texture is preserved for copolysiloxanes PSI-2-8. Composition limit for mesophase existence of copolysiloxanes of mesogenic monomers with monomers, that do not contain mesogenic fragments, is to be 60 mol%. In the composition region of mesophase existence the clearing temperature of copolysiloxanes varies from 130℃ into 170℃ and mesophase thermostability is increased by the increasing nonmesogenic component content of copolysiloxanes.

关 键 词：液晶 共聚 硅氧烷 光致变色 高聚物 

分 类 号：O631.24[理学—高分子化学]