含柔性间隔基液晶聚酯合成的新途径

A New Synthetic Method of Liquid Crystalline Polyesters with Flexible Polymethylene Spacer

以对羟基苯甲酸甲酯和合亚甲基数不同的二醇为原料，在酯交换催化剂Ti（OC4H9－n）4／N（n－C4H9）3和热稳定剂亚磷酸三苯酯（C6H5O）3P存在下，采用熔融酯交换反应合成出单体（Ⅰ），Ⅰ与对苯二甲酰氢聚合成6种含柔性间隔基液晶聚酯．经DSC、偏光显微镜表征，6种聚合物均为热致性向列型液晶．

Polymethylene his(p-hydroxybenzoates) (Ⅰ) were prepared from solbrol anddifferent dids by melted stated transesterification reaction with Ti (OC4H9-n)/N (n-C4H9)3 asthe catalyst and (C6H5O)3P as the heat-stable inhibitor. Six liquid crystalline polyesters weresynthesized from terephthalyl dichloride and (Ⅰ). Thermotropic liquid crystallineproperties of these polyesters were identified by DSC and polarizing microscope with a hot stage.