新型聚丙烯酸酯侧链液晶的合成

Synthesis of New Type of Polyacrylate Side Chain Liquid Crystal Polymer

以对 -羟基苯甲酸、氯乙醇和丙烯酸为主要原料 ,经醚化、酯化和酰氯化反应合成了中间体A、B、C ,进而合成了含液晶基元的丙烯酸酯单体D ;用单体D经自由基聚合反应合成了聚丙烯酸酯侧链液晶 ;分别对中间体A、B、C和单体D以及聚合物进行了表征。结果表明 :单体和聚合物均呈现向列型液晶织态结构 ,聚合物在较宽的温度范围内有很好的液晶性。

Side-chain liquid crystal polymacrylate was synthesized by free radical polymerization form the acrylate monomer which was generated with p-hydroxy benzoic acid,ethylene chlorohydrin and acrylic acid as major raw materials In the process acrylate monomer (D) and intermediates(A、B and C) were prepared by etherification,esterification and chloration of acid The intermediates were characterized by IR, and its melting point was measured The textures of the monomer and polymer were observed under POM; the polymer was characterized by means of DSC and IR The results showed that the texture of the monomer and polymer were the type of nematic liquid crystalline, and the polymer had good liquid crystal performance in a wide temperature range