Kinetics of polypropylene macroradicals termination in the course of its modification

The kinetics of PP macroradicals termination generated under gamma -irradia tion in the presence of low-molecular-mass compounds immobilized in the pol ymer matrix, which are used as monomers in free-radical polymerization both active, such as styrene and methyl methacrylate, and inactive, such as vin yltriethoxysilane, was studied by EPR spectroscopy. It was shown that the t ype of the monomer additives determines the mechanism and the rate of PP ma croradicals termination. The effective rate constants for the macroradicals termination in the presence and absence of the low-molecular-mass compound s under examination were calculated.