新型液晶高分子聚合物的合成与表征

合成了丙烯酸异山梨醇双酯和4-(丙烯酸乙氧基酯)苯甲酸胆甾醇酯液晶中间体，经红外光谱、核磁共振氢谱和元素分析确认其结构。通过聚合反应将丙烯酸六氟丁酯引入并合成了4-(丙烯酸乙氧基酯)苯甲酸胆甾醇酯基元含氟侧链高分子液晶，采用红外光谱、核磁共振氢谱和氟谱表征了该液晶的分子结构。通过DSC和偏光显微镜分析这种高分子液晶的玻璃化温度、清亮点及相变区间，结果表明，该液晶具有玻璃化温度、清亮点低，相变区间窄的特点，且随着丙烯酸六氟丁酯成分的增加,高分子液晶的玻璃化温度略有增加。

Synthesis and characterization of a new liquid crystal polymer

Two liquid crystal monomers were synthesized: acrylic isosorbide diester and 4- (acrylic ethoxy ester) benzoic acid cholesterol ester. Their structures were identified by IR, 1HNMR and elemental analysis. Hexafluorobutyl acrylate was introduced to the liquid crystal polymer by radical polymerization, and liquid crystal polymer 4- (acrylic ethoxy ester) benzoic acid cholesterol ester with fluoride side chain was synthesized. Its molecular structure was characterized using IR, 1HNMR, 19FNMR and the texture was studied by DSC and POM. The results show that this liquid crystal has low glass-transition temperature，low clearing point, small phase transformation interval, and its glass-transition temperature increased slightly as the ratio of hexafluorobutyl acrylate increased.