1993•Journal of Applied Polymer ScienceRequires access

Improved mechanical properties of NR/EPDM and NR/ butyl blends by precuring EPDM and butyl

N. Suma, Rani Joseph, K. E. George

Abstract

Abstract Ethylene‐propylene‐diene rubber (EPDM) and isobutylene‐isoprene rubber (IIR) were compounded, precured to a low degree, and then were blended with natural rubber (NR). The compounding ingredients for NR were then added and the final curing was done. NR/EPDM and NR/IIR blends, prepared using this method, were found to possess much improved mechanical properties as compared to their conventional counterparts. The optimum precuring crosslink density that has to be given to the EPDM and IIR phases has been determined. © 1993 John Wiley & Sons, Inc.

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Key concepts: Isobutylene, Butyl rubber, EPDM rubber, Natural rubber, Ethylene propylene rubber, Compounding, Isoprene, Materials science