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Abstract
The application of peroxydiphosphate coupled with bivalent metal ions like Fe(n) and Mn(II) to induce graft copolymerization of methyl methacrylate onto cellulose fibers by varying the concentrations of monomer, initiator, acid, reducing agent, solvents, and temperature has been studied. The rate of grafting increases progressively with increasing monomer and reducing agent concentrations. The rate of grafting also increases with peroxydiphosphate concentration up to 10.0 × 10−3 M and with sulfuric acid concentration up to 9.0 × 10−2 M after which it decreases. The effects of addition of some solvents and temperature on graft yield were also studied. The effect of modified cellulose on the rate of grafting was also studied. Both systems have been investigated under identical conditions. A larger percentage of grafting was observed in the case of Mn(II) than of Fe(II). A suitable kinetic scheme has been developed, and rate equations have been derived.