Abstract
AbstractMethyl acrylate (MA), methyl methacrylate (MMA), and n‐butyl vinyl ether (n‐BVE) have been graft‐copolymerized onto Himachali wool in an aqueous medium by using tertiary butyl hydroperoxide ferrous ammonium sulfate (TBHP‐FAS) redox system at 40°C, 50°C, 60°C, and 70°C for various reaction periods. Percentage of grafting and percent efficiency have been determined as functions of concentration of monomers, molar ratios of [TBHP]/[FAS], time and temperture. Molar ratios of [TBHP]/[FAS] were found to influence grafting of different monomers studied. Chemical evidence indicates that a covalent bond formation occurs between grafted polymeric chain and backbone polymer. The rate of grafting (Rp) and induction period (Ip) of different monomers towards graft copolymerization were determined as function of total initial monomer concentrations. Rp and Ip of n‐BVE are independent of total initial monomer concentrations while Rp and Ip of both MA and MMA were found to depend on the total initial monomer concentrations. MA, MMA, and n‐BVE were found to differ in reactivity towards grafting onto wool in the presence of (TBHP‐FAS) redox system; the following reactivity order was observed: MMA > MA > n‐BVE.
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