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Studies on K2S2O8/Ascorbic acid initiated Synthesis and Characterization of Poly(methyl methacrylate)-grafted-Sodium salt of Partially Carboxymethylated Tamarind Kernel Powder

Sodium salt of Partially Carboxymethylated Tamarind Kernel Powder (Na-PCMTKP, DS = 0.15) was grafted with polymethyl methacrylate using potassium persulfate (KPS)/ascorbic acid (AA) redox initiator in an aqueous medium. The optimal grafting conditions were established by varying the reaction conditions such as concentrations of monomer (MMA), KPS and AA as well as reaction time, temperature and amount of backbone. The influence of these reaction conditions on the grafting yields (%G and %GE) was discussed. The proposed reaction mechanism could explain very well the experimental results. A representative polymethyl methacrylate grafted Na-PCMTKP (%G = 146.25 and %GE = 75.29) was characterized using FTIR, TGA and SEM studies.