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Kinetic Study Of The Aqueous Polymerization Of Ethyl Acrylate Initiated By Ceric Ion-Reducing Agent System

G.V.Ramana Reddy, R.Prathipa, R.Sriram

The kinetic study of the aqueous polymerization of ethyl acrylate (EA) is carried out at 30oC in nitric acid medium by employing ammonium ceric nitrate (ACN)-isopropyl alcohol (IPA) as the redox initiator system. The ceric ion consumption is found to be first order with respect to ceric ion concentration. The formation of complex between Ce(IV) and reducing agent is observed. The orders for the aqueous polymerization of EA are found to be 0.51, 0.52 and 1.43, respectively, with respect to Ce(IV), IPA and EA concentrations. The overall activation energy, Eoverall, for the aqueous polymerization of EA is evaluated in the temperature region 27-40oC. A kinetic mechanism for the aqueous polymerization of EA initiated by redox initiator system is presented.