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Abstract

The irradiation induced crosslinking of 50:50 poly (vinyl chloride)–epoxidised natural rubber (PVC–ENR) blend was studied in the presence of 0–1·5 pphr antioxidant Irganox 1010. The samples were irradiated using a 3·0 MeV electron beam machine at doses ranging from 20 to 200 kGy in air and room temperature. The gel fraction, tensile strength T _s, modulus at 100% elongation M ₁₀₀, elongation at break E _b, hardness, and resilience were used to follow the irradiation induced crosslinking of the blend. The decline in gel fraction, T _s, M ₁₀₀, hardness, and resilience and the concurrent increase in E _b with increasing antioxidant indicated the inhibition of irradiation induced crosslinking by the antioxidant used. The improvement in aging properties of the blend with the addition of the antioxidant is also reported. It was evident from FTIR that Irganox 1010 is involved in the stabilisation of the blend against irradiation induced degradation.

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Irradiation crosslinking of PVC–ENR blend Effect of efficient radical scavenger

Abstract

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