Abstract

A series of liquid crystal elastomer films (the P_BC series) have been synthesized by grafting liquid crystal (LC) monomer 4-allyloxybenzoic acid cholesteryl ester (M_B) and crosslinking agent [1,1'-biphenyl]-4,4'-diyl bis(undec-10-enoate) (M_C) onto polymethylhydrosiloxane catalyzed by hexachloroplatinic acid at 60 °C. The P_BC series are cholesteric liquid crystal elastomers (LCEs). The glass transition temperatures (T_g) of the P_BC series are between 23-33 °C, and the LC range is above 200 °C. The temperatures of 5% weight loss of the P_BC series are above 300 °C, which shows good thermal stability. The P_BC series display good orientation. P_B3C3 shows a good ability of shape recovery above T_g.

摘要

_{通过接枝液晶（LC）单体4-烯丙氧基苯甲酸胆甾醇酯（MB ）}和交联剂[1,1'-联苯]-4,4'-合成了一系列液晶弹性体薄膜（PBC_系列）在 60°C 下，六氯铂酸催化二基双（十一月 10 烯酸）(MC ₎到聚甲基氢硅氧烷上。P _BC系列是胆甾型液晶弹性体 (LCE)。P _BC系列的玻璃化转变温度（T _g ）在23-33 °C之间，LC范围在200 °C以上。_{P BC}系列5%失重温度在300℃以上，具有良好的热稳定性。PBC _{_}系列陈列方向性好。P _{B3C3在T g}以上显示出良好的形状恢复能力。