Thermal Aging Behaviors of Elemental Sulfur-Free Polyisoprene Vulcanizates

摘要

Rubber materials have good physical properties by crosslinking.Crosslink density of a rubber vulcanizate determines the physical properties.By increasing the crosslink density,the modulus,hardness,resilience,and abrasion resistance increase,whereas the elongation at break,heat build-up,and stress relaxation decrease.Rubber compounds are crosslinked by a sulfur,peroxide,or resole cure system.The sulfur vulcanization is the most popular method.In general,a rubber compound with an accelerated sulfur cure system contains elemental sulfur (S_8) and cure accelerators.