新型含双键的胆固醇单体及其液晶聚合物的合成

摘要

Cholesterol monoesters(3a or 3b) with carboxyl functional group were prepared by the es-terification of cholesterol with succinic anhydride or phthalic anhydride. Novel cholesterol monomers with a double bond,monocholesterylsuccinate(4a) or monomercholesterylphthalate(4b) were synthesized by the esterification of 3 with hydroxyethyl methacrylate in the presence of DCC/DMAP. 4a or 4b was polymerized through three vacuum-freeze-thaw cycles and sealed under vacuum to obtain two novel liquid crystalline polymers (5a and 5b). The structures were characterized by 1H NMR and IR. The thermal properties and liquid crystalline morphology of 5 were investigated by DSC,TGA and POM.%胆固醇分别与丁二酸酐、邻苯二甲酸酐反应制得带羧基功能基团的胆固醇单酯——丁二酸单胆固醇酯(3a),邻苯二甲酸单胆固醇酯(3b)；3与甲基丙烯酸羟乙酯在DCC/DMAP催化下完成酯化反应合成了新型含双键的胆固醇单体(4a和4b);4经抽真空-冷冻-通氮气循环三次后真空封管聚合制得液晶聚合物(5a和5b),其结构经1H NMR,IR表征；5的热性能及液晶形态用DSC,TGA和POM研究.