Abstract
Sodium salts of partially carboxymethylated starch-g-poly(hydroxypropyl methacrylate)(Na-PCMS-g-PHPMA) copolymer containing 35-45% PHPMA were prepared using ceric ammonium nitrate (CAN) as an initiator. All the experiments were run with Na-PCMS (DS-1.10). Graft copolymers were characterized with respect to % PHPMA, % total conversion, % grafting, % grafting efficiency and confirmation of grafting was done by infrared spectral analysis. Variables investigated in the graft copolymerization reaction were nitric acid concentration, reaction time, reaction temperature and ceric ion concentration. The results are discussed with illustration.
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