含对甲氧基苯氧羰基偶氮苯基团的侧链液晶高分子的合成与表征

报道了新型的含对甲氧基苯氧羰基偶氮苯基团的甲基丙烯酸酯单体与含对甲氧基苯氧羰基苯基团的甲基丙烯酸酯单体的合成及其自由基共聚合．利用１Ｈ ＮＭＲ、ＩＲ、ＵＶ Ｖｉｓ、元素分析、ＧＰＣ、ＴＧ ＤＴＡ、ＰＯＭ及Ｘ 射线衍射等手段对偶氮单体及聚合物的结构与性能进行了表征，证明两种单体的共聚合产物为无规共聚物，而且各聚合物均具有较好的热稳定性．研究结果还表明，偶氮单体与聚合物在升温过程中均显示出向列相液晶织构，且聚合物的液晶相范围随偶氮含量的增加而变宽．

SYNTHESIS AND CHARACTERIZATION OF SIDE-CHAIN LIQUID CRYSTALLINE POLYMERS BEARING PARA-METHOXYPHENYLOXYCARBONYLAZOBENZENE GROUP

The synthesis and free radical polymerization of the novel methacrylate monomer containing para methoxyphenyloxycarbonylazobenzene group (AZO2) and the methacrylate monomer containing para methoxyphenyloxycarbonylbenzene group (MAPB2) are described.The novel azo monomer and the polymers were characterized by 1H NMR,IR,UV Vis,elemental analysis,GPC,TG DTA,POM and X ray diffraction techniques.The polymers obtained from the copolymerization of AZO2 and MAPB2 are proved to be random copolymers and all of the polymers show relatively good thermal stability.In addition,the azo monomer and the polymers exhibit nematic liquid crystalline textures and the temperature range of liquid crystalline behavior of the polymers broadens with increasing the azo content of the polymers.