Radiation stability of polypropylene/lead zirconate composites

摘要

The effects of PbZrO3 filler in polypropylene were studied by isothermal and nonisothermal chemilu-minescence and FT-IR spectroscopy after γ(~(137)Cs)-irradiation at 20, 50,100 and 250 kGy relative to neat material. For the two filler concentrations (2 and 5 wt%) the improvement in radiation stability can be noticed. The increase in the filler concentration stabilizes polypropylene matrix, whose oxidation rate decreases sharply even at 250 kGy. The interaction of polypropylene matrix with filler is discussed based on the adsorption of free radicals on zirconate particles and the electronic coupling of radiolysis intermediates and filler cations.