“…The supplements that have been applied in MREs include zinc oxide and stearic acid as activators, sulfenamide (CZ) as an accelerator, sulfur as a crosslinking agent, and mercaptobenzothiazole. The types of synthetic rubber that have been applied in MREs are styrene butadiene rubber, [169] chloroprene rubber (CIIR), [117] bromobuthyl rubber (BIIR), [170] isobutylene-isoprene, [171] cis-polyisoprene, [172] cis-polybutadiene, [173][174][175][176][177][178] acrylonitrile rubber, [47,[179][180][181] and ethylenepropylene rubber. [98] Synthetic rubber-based MREs received more attention than the natural rubber MREs since they have higher resistance to oil, better aging, and weathering as well as resilience over a wide temperature range.…”