【摘要】 首次合成了一种不对称联苯和芳香酯型液晶环氧树脂4’’-环氧丙氧基苯甲酸-4-环氧丙氧基联苯-4’-酯(EBEPC),利用FT-IR、1H NMR、DSC和POM对其结构和性能进行了表征。结果表明,EBEPC在190℃时可形成明显的向列相液晶。对其同普通固化剂DDM体系的固化反应过程、固化动力学进行了研究,与普通环氧树脂E-51/DDM体系比较,液晶环氧树脂EBEPC体系具有较低的固化反应温度,且表观活化能Ea(54.5kJ/mol)较E-51/DDM体系(60.7kJ/mol)低,EBEPC体系具有更高的反应活性。更多还原

【Abstract】 A novel liquid crystalline epoxy resin containing biphenyl and aromatic ester-type structure 4-(2,3-epoxypropoxy)biphenyl,4’’-(2,3-epoxypropoxy)phenyl-4’carboxylate(EBEPC) was synthesized.The structure and phase behavior of the synthesized product were characterized by means of IR,1H NMR,DSC and POM.The result showed that a clear single axis homeotropic nematic droplet texture was obtained.The liquid crystalline epoxy resin was cured with a curing agent diaminodiphenylmethane(DDM).The results displayed that EBEPC/DDM system had a lower curing reaction temperature than the ordinary epoxy resin E-51 system which was also cured by DDM,and the apparent activation energy(Ea) of liquid crystalline epoxy resin system(54.5kJ/mol) was lower than E-51 system(60.7kJ/mol).It indicated that the EBEPC system had higher reaction activity than the E-51 system.更多还原