STUDY OF METHYL METHACRYLATE-ACRYLAMIDE COPOLYMERIZATION SYSTEM IN CYCLOHEXANONE IN THE ABSENCE OF CONVENTIONAL RADICAL INITIATOR

The copolymerization of a methyl methacrylate-acrylamide system has be en studied at 75 degrees C in the absence of any radical initiator, th ermal in dioxane, and in pure cyclohexanone, cyclohexanone/dioxane mix ture and cyclohexanone/benzene mixture. The r-parameter values are cal culated by FR, YBR, KT and EVM methods. The calculation method conside rably influences the reactivity ratio values. A comprehensive comparat ive study of r-parameters and 'bootstrap' effect for the investigated systems, and the same monomer system initiated by the free radical ini tiator described in the literature, is presented. Discrepancies betwee n the results obtained and examples for the 'bootstrap' effect given i n the literature are discussed. The kinetic data obtained confirm spec ific interactions of methyl methacrylate and cyclohexanone. Copyright (C) 1996 Elsevier Science Ltd.