Graft copolymeriration of methyl methacrylate was performed onto wool reduced by various chemicals using ferrous ammonium sulfate and hydrogen peroxide redox system at 45°C temperature. Reduced wools show higher percentage of polymer deposition as compared to natural because the thiol groups act as graft centers. Mechanical properties of MMA-reduced wool graft copolymers were studied. Results indicate that, with approximately 50% graft copolymeriza tion, the decrease in elongation is considerably high and the tensile strength is decreased slightly. In case of modulus, an initial increase with polymer deposition followed by a decrease. Density and moisture regain were also determined and the results were discussed in relation to mechanical properties of graft copolymers.
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