Abstract
The effects of respective concentrations of hydrogen peroxide (H 2O 2), methylmethacrylate (MMA) and Leucaena glauca seed gum (LGG) on the graft copolymerization of LGG-MMA have been studied by evaluating the rates of total polymerization (k tp), homopolymerization (k h) and graft copolymerization (k g) at different reaction times. The study shows that the grafting depends greatly upon the rate influencing factors. The grafted products have been characterized by infra-red sepctroscopy and thermogravimetry along with the usual methods based on grafting parameters. The optimum grafting conditions derived from the investigation at 85°C are: H 2O 2 concentration 10 mM litre −1, a backbone to monomer concentration ratio of 0·20 for 120 min, which yielded nearly 48% of grafting.
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