Abstract
Many widely used polymers suffer main chain scission or crosslinking depending upon various physical parameters when exposed to radiation. Crosslinking and scission are two opposite consequences of irradiation. The preparation of pure Poly(vinyl fluoride) (PVF), Poly(vinylidene fluoride) (PVDF) and their isomorphic polyblends in different weight percentage proportion using solution cast technique is described. The effect of gamma irradiation on the surface microhardness of pure and polyblends of PVF and PVDF have been studied to detect radiation-induced crosslinking and radiational scissioning. The surface microhardness of the irradiated specimen was measured using Vickers method. The overall hardening of blend specimens at different dose level indicates occurrence of crosslinking. For lower radiation dose range of 0–1 Mrad and higher dose range of 1–25 Mrad, the maximum hardening is observed at 0.2 and 20 Mrad, respectively. However, beyond 15 Mrad, scissioning effect predominates in pure as well as polyblend specimens.
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