Effect gamma radiation on stabilized NBR/PVC blend in presence of various additives

The effect of Gamma Irradiation on the physico-mechanical and electrical properties of acrylonitrile-butadiene rubber(NBR)/polyvinyl chloride(PVC) blend in presence of different additives has been studied. The additives include: stabilizers, fillers and crosslinking co agent. The stabilizer system magnesium oxide/zinc oxide/stearic acid was found to improve all the considered properties over the whole range of irradiation. The incorporation of fillers namely, HAF-carbon black, talc and flespar changed the properties of the blend. The addition of HAF-carbon black resulted in a high improvement in the mechanical and electrical properties of the blend. The improvement due to talc was relatively small and became higher upon the addition of the co agent. In contrast, flespar deteriorates the mechanical properties of the blend which make the addition of co agent is very necessary. The highest improvement was attained at 140 kGy in presence of the co agent. The addition of both talc and flespar slightly improves the electric resistance of the enhanced blend, especially, at low irradiation doses.20 fig