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Kinetics of radical polymerization of glycidyl methacrylate initiated by multi-site phase transfer catalyst–potassium peroxydisulfate in two-phase system

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Abstract

The kinetics of radical polymerization of glycidyl methacrylate, initiated by the free radicals formed in situ in the multi-site phase transfer catalyst (PTC), 1,1,2,2-tetramethyl-1-benzyl-2-n-propylethylene-1,2-diammonium bromide chloride–potassium peroxydisulfate system was studied in an aqueous–organic two-phase media at 60°C ± 1°C under inert and unstirred condition. The rate of polymerization (Rp) was determined at various concentrations of the monomer, initiator, catalyst, and volume fraction of aqueous phase. The effect of acid, ionic strength, and water-immiscible organic solvents on the Rp was examined. The temperature dependence of the rate was studied, and activation parameters were calculated. Rp increased with an increase in the concentrations of monomer, initiator, multi-site PTC, and increase in the polarity of solvent and temperature. The order with respect to monomer, initiator, and multi-site PTC was found to be 0.50. A feasible free-radical mechanism consistent with the experimental data has been proposed, and its significance was discussed. The synthesized polymer was confirmed by Fourier transform infrared spectral analysis. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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