Kinetics and mechanism of polymerization initiated by manganic ion-ethoxyacetic acid redox system — A study on the reactivity of vinyl monomers
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The kinetics of polymerization of acrylic acid (AA) and methacrylamide (MAM) initiated by the redox system Mn3+ -ethoxyacetic acid (EAA) in aqueous sulphuric acid was studied at 35°C. The polymerization of both the monomers followed the same mechanism, viz., initiation by the primary radical arising from the oxidation of EAA and termination by the Mn3+ ion. The rate coefficientsk i /k 0 andk p /k i were correlated to monomer and polymer radical reactivities, respectively. Acrylic acid was found to have higher monomer and polymer radical reactivities than methacrylamide.
KeywordsPolymerization acrylic acid methacrylamide reactivity
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