Studies on Cure Kinetics of Diglycidyl Ether of 4,4'-Bisphenol/4,4'-Diaminobiphenyl Using the Advanced Isoconversional Method

摘要

The cure kinetics of a rigid-rod epoxy monomer,diglycidyl ether of 4,4'-bisphenol(DGEBP),and the curing agent with the similar rigid-rod group,4,4'-diaminebiphenyl(DABP),was studied using an advanced isoconversional method(AICM).DGEBP/DABP curing system was carried out by means of differential scanning calorimetry(DSC).Three exothermic peaks were depicted by nonisothermal DSC studies:the first two peaks were attributed to the curing reaction,and the last peak was attributed to the decomposition of the cured epoxy resin.The LC phase transformation of the curing process was observed by PLM.Using AICM,the largest activation energy of the curing reaction of DGEBP/DABP system was obtained as 108kJ/mol.It can also be learned that LC phase transformation of the curing process affects the reaction significantly.