KINETICS OF RADIATION-INDUCED GRAFT-COPOLYMERIZATION OF VINYL-ACETATEONTO ETHYLENE-CO-PROPYLENE RUBBER MEMBRANES

The kinetics of radiation-induced graft copolymerization of vinyl acet ate onto ethylene-copropylene rubber (EPR) membrane has been studied i n methanol with a radiation source of cobalt-60. The effect of monomer concentration, dose rate, Cu2+ concentration and temperature on the g rafting rate were investigated. The results show that the functional r elationship equation is dg(0)/dt = k[M](1.95)(0) D[Cu2+](0.5). The app arent activation energy and collision frequency factor of the grafting polymerization are 49 kJ mol(-1) and 8.9 x 10(8)G% kGy(-1) h(-1) mol( -2.45) L(2.45), respectively. The work established that the relationsh ip of the initial grafting rate (dg(0)/dt) with various effect Factors : ln(dg(0)/dt) = 20.61 - 5894(1/T) + 1.95 ln[M](0) + lnD + 0.5 ln[Cu2]. Copyright (C) 1997 Elsevier Science Ltd