In this study, graft polymerization of methyl methacrylate to polypropylene fibers using benzoyl peroxide as a chemical initiator have been investigated. The effect of initiator and monomer concentrations, reaction time, and temperature on the dyeability and physical properties of polypropylene were studied. Grafting yield was increased with increasing initiator concentration up to 6.19×l0^(-3)M and then decreased, the same result for methyl methacrylate grafting on polypropylene fiber that increased with an increase in the methyl methacrylate concentration until the concentration reaches 3×l0^(-1)M. The grafting temperature have effect on grafting yield, when temperature is higher or lower will be as a result of lower grafting yield, the optimal temperature for grafting is about 80℃. Moreover, the moisture regain and K/S all obviously increase with grafting yield, but the strength and degradation temperature of grafted fiber were decreased. Scanning electron microscopy (SEM) revealed that the graft copolymer on surface of polypropylene fiber increased with an increasing grafting yield.
