Abstract
The vapor-phase graft-copolymerization of methyl methacrylate onto polypropylene fibers was studied by a pre-irradiatioR technique and the weight increase during the reactien was followed by a spring balance method. The grafting reacti was spressed with icreasing irradiation temperature. The rate of weight increase cf fibers due te the grafting reaction became larger with increasing vapor pressure'of menemer and pre-irradiation dese. The rate of grafting reaetien decreased with increasing grafting time in general, but the acceleration in rate was observed with decreasing grafting temperature. The grafted fibers contained almost no oeeluded homopolymers. The grafting reacticn process was we11 explained by taking into aceeunt of the increase in sorption caused by the increase in the extent of grafting.
The DSC measurement en the stepwise-annealed grafted fibers ghowed the effect ef grafted branch on the recrystallization.
