writer：S.Q. Ma, W.Q. Liu*, Y. Zhao, Z.L. Yan, N. Gao
keywords：Cycloaliphatic epoxy, autocatalytic, curing behavior, thermal properties
source：期刊
specific source：Journal of Macromolecular Science, Part A: Pure and Applied Chemistry
Issue time：2012年
Cycloaliphatic epoxy resin containing hydroxyl group (DMTMP) was prepared by the transesterification between methyl-3,4-epoxycyclohexane carboxylate (MEC)and trimethylolpropane (TMP),whichwas then thermally cured with methylhexahydrophthalic anhydride (MHHPA).As comparison, a commercial available cycloaliphatic epoxy 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexane carboxylate (ERL-4221) cured with the same curing agent was also investigated. The chemical structure was characterized by FTIR and 1H-NMR. And the curing behavior and the thermal properties were studied by DSC and TGA. The DSC results showed that the DMTMP systems exhibited higher reactivity than the ERL-4221 systems due to the autocatalysis of hydroxyl group of DMTMP. While the glass temperature transitions (Tgs) of DMTMP systems were much lower than ERL-4221 systems, and the Tgs of DMTMP and ERL-4221 systems both reduced after introducing n-dodecyl trimethylammonium bromide (DTAB) as catalyst. The decomposition behavior from TGA shows that the DMTMP epoxy resins exhibited a relative slow weight decreasing tendency in comparison with ERL-4221 epoxy resins, but initial degradation temperatures of DMTMP systems were lower than ERL-4221 systems.