反应型的聚酯型热致性液晶聚合物的合成与表征

Synthesis and Characterization of Novel Reactive Thermotropic Liquid Crystalline Polymer

采用溶液聚合方法合成了一种新型的、端基上含有双犍的反应型热致性液晶聚合物（LCMC），采用DSC、TGA测试了产物的热性能，用FT—IR、WAXD、POM表征了产物的微观形态结构。结果表明，LCMC在228℃～290℃区间显示了向列型的热致性液晶特性。

One kind of novel reactive thermotropic liquid crystalline polymer was synthesized from α-methacryloyl chloride and liquid crystalline polyester（PHBT） which was prepared from hexamethylene bis （4-hydroxybenzote） and terephthaloyl dichloride by solution polymerization. The intrinsic viscosity（ηinh）was determined using an ubbelohde viscometer in 1, 1,2, 2-tetrachloroethane solvent at 25 ℃, and the results show that the ηinh hvalues of PHBT and LCMC is 0. 0443 dL/g and 0. 0797 dL/g respectively. FT-IR analysis identifies the reaction between methacryloyl chloride and PHBT. The crystalline properties of：polymers were investigated with DSC and WAXD, and the results indicate that the crystalline of LCMC is superior to that of PHBT due to the addition of regular methacryloyl. Thermotropic liquid crystalline nematic phase textures of polymers were observed under a polarizing optical microscope with hot stage.