海因环氧树脂/HHPA体系的制备与性能

合成了海因环氧树脂,采用红外光谱和核磁共振进行了表征,以六氢苯酐(HHPA)为固化剂,制备了海因环氧树脂/HHPA体系,研究了海因环氧树脂/HHPA体系的固化反应性及其固化物的性能。结果表明:树脂体系在升温速率为10℃/min的条件下,在90～210℃有一放热峰,峰值温度为152.5℃;100℃下的凝胶时间大于42min,在140℃下为8min;树脂浇铸体的氧指数为23,抗弯强度为122MPa,弯曲模量为2.7GPa,冲击强度为14.9kJ/m2。

Synthesize Hydantoin Epoxy and Preparation Cured Hydantoin Epoxy/HHPA

Hydantoin epoxy resin was synthesized and hydantoin epoxy in presence of hexahydrophthalic anhydride(HHPA) as the curing agent was preparation.Hydantoin epoxy resin was substantiated by FTIR and 1H-NMR spectrum.Non-isothermal differential scanning calorimetry(DSC) was examined to follow the curing reaction of hydantoin epoxy/HHPA system.Epoxy equivalent of hydantoin epoxy resin is 164g equiv-1 and viscosity is 6.9Pa·s at 25℃ which the closed to diglycidyl ether of bisphenol F(CYDF-180).The DSC analyses showed that there are an exothermic reaction peak from 90℃ to 210℃ for the hydantoin epoxy/HHPA system and top of the peak is 152.5℃ at 10℃/min,which determined main reaction of hydantoin epoxy/HHPA system.The curing process temperatures such as gel temperature(Tgel)=93.7℃,curing temperature(Tp)=136.9℃ and post-curing temperature(Ttreat)=181.2℃ were acquired by extrapolation,which confirmed a lowering of the cure temperature of the hydantoin epoxy/HHPA system to avoid defect formation.Curing characterization of hydantoin epoxy resin is the similar with diglycidyl ether of bisphenol A.The hydantoin epoxy/HHPA cured resin was made and its properties were studied.Investigations show that the flexural strength is 122MPa,flexural modul is 2.8GPa,impact strength is 14.9kJ/m2,and limit oxygen index is 23 which indicates mechanical properties of hydantoin epoxy resin exceeds diglycidyl ether of bisphenol A.Therefore hydantoin epoxy resin can a candidate matrix for performance composite material manufacture and adhesive application in automobile industries,shipbuilding,aerospace,laminates and insulation material.