This might be reflected
in better high-temperature performances as higher hot-tear
strength It is well known that interaction of electron beam
irradiation with a polymer results in the formation of free radicals
formed by dissociation of the excited state or by ion molecular
reaction. The vulcanization reaction or chain scission occurs
during the irradiation of polymer. Electron beam irradiation
process does not employ chemical agents such as peroxides. Using
small amounts of coagents such as ethylene glycol dimethacrylate
(EGDMA), trimethylol propane trimethacrylate (TMPTA) or trimethyl-propane
trimethacrylate (TPTA) can help to reduce the
dose required for vulcanization. Two important factors in
irradiation are irradiation and temperature. The reaction mechanism
of electron-beam curing system is shown as follows.
Many studies have been carried out to investigate the effects of
sulfur content on mechanical, thermal and electrical properties of
SBR and NR blends but reports on the effect of electron beam irradiation on these
blends are scarce. Hence, the aim of this research is to compare
physico-mechanical and chemical resistance properties of
NR/SBR blend vulcanizates with electron beam and sulfur-curing
processes.