Effect of Curing Agent DTDM on Properties of Vulcanized EPDM

The effect of curing agent DTDM on properties of vulcanized EPDM was studied as the using level of sulfur were 0 phr and 0.5 phr.The results showed that the compound based on EPDM had lower curing rate,longer pre vulcanization time and better mechanical properties when DTDM was used without sulfur.While little sulfur was added to the curing system of DTDM,the mixture cured faster,had shorter pre vulcanization time and worse properties.On condition that S0 phr,DTDM4 or S0.5,DTDM3,the cross link density of EPDM came to a peak.No matter in the curing system of S0 or in that of S0.5,the heat aging property of EPDM was better as the using level of DTDM was 3 to 3.5 phr.