Abstract:

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.