This might be reflected
in better high-temperature performances as higher hot-tear
strength (Basfar et al., 2002; Nishitsuji et al., 2007; Magda,
2007). 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 (Hafezi
and Nouri khorasani, 2007):