Abstract: The copolymerization of a light stabilizer, 3,2,6,6-tetramethyl-4-piperidinyl-methacrylate (MTMP), onto the surface of polypropylene film by ultraviolet radiation in the presence of benzophenone (BP) or di-tertiary butyl peroxide has been studied. The influence of various factors on the copolymerization was examined. The surface morphology and photostability of grafted polypropylene have taken apparent changes, the wettability has a slight increase.

Key words: polypropylene film, 2,2,6,6-tetramethyl-4-piperieinyl-methacrylate, surface grafting