一种丙烯酸酯型侧链液晶高分子的合成及液晶性的研究  

Synthesis of Side-chain Liquid Crystalline Polyacrylate and Its Liquid Crystalline Property

作　　者：吴兵[1] 范程士[1] 章于川[1] 

机构地区：[1]安徽大学化学化工学院,安徽合肥230039

出　　处：《液晶与显示》2007年第1期21-25,共5页Chinese Journal of Liquid Crystals and Displays

基　　金：安徽省绿色高分子重点实验室资助项目

摘　　要：依据液晶分子结构理论,选择联苯基作为介晶基元,六亚甲基为柔性间隔基,合成了一种丙烯酸酯侧链型液晶高分子。对于合成的中间及目标产物通过FTIR、1HNMR等进行了结构的表征。对于聚合物采用GPC法测量了其分子量,并通过DSC、POM、XRD和计算机模拟等手段研究了其液晶性。研究表明合成的聚合物分子量-Mn=2523、-Mw=2826,具有较宽的温域(45.3～95.2℃),且为典型的近晶A相液晶。Based on the liquid crystalline polymer theory, a kind of polyacrylate was synthesized by choosing biphenyl group as rigid nucleus of mesogenic unit and hexylidene as flexible spacing group. The molecular weight of the polymer was determinated by GPC, and the liquid crystalline properties,such as phase transition temperature and texture structure of the polyacrylate were characterized by DSC, POM,XRD and computer simulating molecular chain length in lowest energy and optimum structure. The molecular weight of the polymer Mn=2 523 ,Mw=2 826 and the polymer possess a wide temperature range for the liquid crystal phase,about 50 ℃ ,and exhibits smectic A phase.

关 键 词：液晶高分子 丙烯酸酯 液晶性 计算机模拟 

分 类 号：O753.2[理学—晶体学]