Electron-beam irradiation of poly(vinyl chloride)/epoxidized natural rubber blend in the presence of Irganox 1010

摘要

The effect of irradiation on a 50/50 poly(vinyl chloride)/epoxidized natural rubber blend was studied in the presence of 0-1.5 phr Irganox 1010. The blend was irradiated by using a 3.0 MeV electron beam machine at 0, 100 and 200 kGy irradiation doses. The results on the gel fraction and tensile strength revealed the inhibition of the irradiation-induced crosslinking by the Irganox 1010. The dynamic mechanical analysis and scanning electron microscopic studies further confirmed these observations. The consump- tion of the Irganox 1010 during irradiation and the stability offered by the antioxidant against irradiation-induced oxidative degradation was evident from FTIR analysis. The retention in the tensile strength upon ageing at 70℃/168 h suggests that the addition of 0.5 phr Irganox 1010 is essentially sufficient to provide stability to the blend with minimum loss in mechanical properties during irradiation.