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

作　　者：韦春[1] 于贤保[1] 陆绍荣[1] 虞锦洪[1] 吕建[1] 

机构地区：[1]桂林工学院有色金属及材料加工新技术教育部重点实验室,广西桂林541004

出　　处：《高分子材料科学与工程》2007年第4期48-51,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(50473060)

摘　　要：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.

关 键 词：反应型热致性液晶聚合物 合成 表征 

分 类 号：O631.1[理学—高分子化学]