Abstract
Vulcanization of EPDM with trazine thiols, poly (triazine disufide), or the copper mercaptides of triazine thiols has been investigated in order to confirm the reaction between EPDM and a triazine thiol film with thiol, disulfide, copper mercaptide groups on brass plate surface in the vulcanizing adhesion of EPDM onto the brass plates at 160°C. The vulcanization of EPDM with triazine thiols, easily occurred in the copresence of sulfenamides, ZnO, and stearic acid at 160°C. EPDM was vulcanized by poly (triazine disulfide) in the copresence of accelerators such as CBS, TMTM, cychrohexylamine, and CMBT, and ZnO at 160°C. Further, the copper mercaptides were found to act as a vulcanizing agent for EPDM in the copresence of CBS and ZnO at 160°C. From the above results, the vulcanizing reaction was explained by the mechanism that, firstly, poly (triazine disulfide) formed is formed from triazine thiols and the copper mercaptides, and then vulcanization of EPDM with the disulfide is accelerated by both CMBT formed during vulcanization and ZnO.
