Abstract
Abstract Ethylene propylene diene terpolymer rubber (EPDM) is susceptible to temperature, and heat can greatly increase the molecular mobility which degrades the mechanical properties of a rubber part. To overcome this problem, EPDM composites containing various nitrile functionalized graphene (GN-CN) were prepared and investigated for the effects of surface modification on the mechanical properties under low and high temperature. Results indicated that, the tensile strength of 3phr GN-CN filled EPDM composite reaches 11.8 and 6.0 MPa at 25 °C and 70 °C, respectively, which is 63.9% and 100% higher than that of unfilled one. Meanwhile, the strength loss of the EPDM/GN-CN composite under 70 °C is 49.1%, which is 9.2% lower than that of EPDM. It was demonstrated that, the reaction of the nitrile groups is benefit to the tensile strength and heat resistance improving of EPDM.
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