Abstract
The co-curing of EPDM and diene rubbers has been discussed about cure rate, compatibility and preferential reaction of curatives between each polymer.We studied on the co-curing of EPDM and NR whose cure rates are largely different.We attempted to make the degree of crosslink equal by blending NR with the pendent sulfur EPDM which was reacted with sulfur and accelerator without zinc oxide.
According to the result, the values of tensile strength and elongation at break of P-EPDM/NR blends were higher than those of EPDM/NR blends.It is shown that a marked improvement in their compatibility is accomplished by P-EPDM and that the pendent sulfur groups combined with EPDM plays an important role for the co-curing of EPDM and NR.
