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A novel hydrogel based on chitosan was prepared by graft copolymerization of acrylic acid on diamino derivative of chitosan, i.e., 6-amino-6-deoxy-chitosan (6a6dC). This diamino chitosan was grafted with acrylic acid in an aqueous solution in contrast to acetic acid in the conventional method. Hydrogen peroxide/l-ascorbic acid redox system was found to be an efficient initiator system for grafting...
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