Mechanical and thermal properties of gamma irradiated LDPE-aPP blends

Abstract Low density polyethylene-atactic polypropylene (LDPE-aPP) blends have been irradiated in air in the dose up to 1500 kGy. Some investigations have been carried out into the effect of irradiation dose and the amount of the unsaturated monomer triallylcyanurate (TAC) on the irradiation blends. The influence of the doses of gamma irradiation on the structure and mechanical properties of the blends has been studied by using calorimetric and stress-strain measurements. After irradiation in air up to the dose of 350 kGy, mechanical properties of the blends with lower content of aPP keep up relatively good. Thermal and mechanical properties of the irradiated blends are discussed in view of different radiation effects in these two homopolymers.