SynopsisPoly(methy1 methacrylate) has been grafted onto chitosan by using Fenton's reagent as a redox initiator in an aqueous medium. Initiation by Fenton's reagent was carried out in the presence of atmospheric oxygen. The percentages of grafting, efficiency, and homopolymer were found to depend on chitosan (RchitOH), ferrous ammonium sulfate (FAS), hydrogen peroxide, monomer (MMA) concentrations, reaction temperature, and reaction time.This waste can be minimized by controlling the (Fe2+) : (H20,) ratio. Evans et al.15 reported that the 'OH generated in eq. (1) is capable of initiating vinyl polymerization. Merz and Waters" suggest that ' OH produced in eq. (1) can be used for grafting vinyl monomers onto cellulose; this fact was proved by Richards' and Bridgef~rd.'~ Chitosan, poly~(l-4)-2-amino-2-deoxy-D-glucose, a product of de-N-acetylation of chitin,'* has been used in the radical polymerization of methacrylic
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