Properties of EPDM/SBR blends cured with peroxide and sulfur coagent

The objective of this study is to address the replacement of up to 30 parts of EPDM with SBR to reduce the cost of finished products and to improve se lected blend properties using more efficient cure systems. Effects of sulfu r, peroxide, and coagent curing systems on blend properties were studied. I t was found that the addition of a small amounts of sulfur as a coagent to the peroxide cure system in EPDM/SBR compounds remarkably improved mechanic al properties of the blends, Important compound properties including: mecha nical properties, compression set, heat aging, and ozone resistance of the EPDM/SBR blends are also compared with those of EPDM compounds.