STUDIES ON THE RADIATION GRAFTING OF RECLAIM RUBBER USING GLYCIDYL METHACRYLATE MONOMER
The effect of an electron beam (EB) and gamma irradiation on the formation of grafting chains onto reclaim rubber (RR) were studied. RR was used as received and subjected to EB and gamma irradiation at various irradiation doses with the presence of monomer glycidyl methacrylate (GMA). EB irradiation on the RR sample initiated the formation of free radicals inside the rubber matrix as confirmed by electron spin resonance (ESR) testing. Irradiation at 100 kGy gives the optimum radical concentration and this finding was supported by the FTIR data which has confirmed the presence of grafting chains inside the rubber matrix and the wider size of the peak region was achieved at the irradiation dose of 100 kGy. FESEM analysis has confirmed the presence of grafting through the formation of a granular structure while DSC analysis shows that the irradiation process gives effects on the grafting reaction. The analysis tells us that electron beam irradiation gives the better result of grafting efficiency compared to gamma irradiation.