不同主链“甲壳型”高分子的合成及其液晶性研究  

Synthesis and Liquid Crystalline Properties of Mesogen Jacketed Polymers with Different Polymer Backbone

作　　者：糜七定[1] 张海良[1] 周其凤[1] 

机构地区：[1]北京大学化学与分子工程学院高分子系,北京100871

出　　处：《高等学校化学学报》1999年第11期1817-1819,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金;中国博士后科学基金

摘　　要：Two monomers of 2,5 bis[( p methoxyphenoxy)carbonyl]benzyl acrylate and 2,5 bis[( p methoxyphenoxy)carbonyl] benzyl methacrylate and their corresponding polymers were successfully synthesized. The mesomorphic behavior of both polymers was examined by using differential scanning calorimetry(DSC) and polarized optical microscopy(POM). It was found that both polymers are noncrystalline with a glass transition temperature of 67.1 ℃ for poly {2,5 bis[( p methoxyphenoxy)carbonyl]benzyl acrylate} and 95.1 ℃ for poly {2,5 bis[( p methoxyphenoxy)carbonyl]benzyl methacrylate}, above which the former can form liquid crystalline state and the clearing temperature is 97.8 ℃ while the latter can not. This indicates that main chain rigidity will affect the liquid crystallinity of mesogen jacketed polymers.Two monomers of 2,5 bis[( p methoxyphenoxy)carbonyl]benzyl acrylate and 2,5 bis[( p methoxyphenoxy)carbonyl] benzyl methacrylate and their corresponding polymers were successfully synthesized. The mesomorphic behavior of both polymers was examined by using differential scanning calorimetry(DSC) and polarized optical microscopy(POM). It was found that both polymers are noncrystalline with a glass transition temperature of 67.1 ℃ for poly {2,5 bis[( p methoxyphenoxy)carbonyl]benzyl acrylate} and 95.1 ℃ for poly {2,5 bis[( p methoxyphenoxy)carbonyl]benzyl methacrylate}, above which the former can form liquid crystalline state and the clearing temperature is 97.8 ℃ while the latter can not. This indicates that main chain rigidity will affect the liquid crystallinity of mesogen jacketed polymers.

关 键 词：甲壳型 液晶高分子 液晶性 主链 MJLCP 

分 类 号：O753.2[理学—晶体学] O631.2