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Kinetic Features of the Redox-polymerization of Acrolein with the Potassium Persulfate-Silver Nitrate System

1969; Oxford University Press; Volume: 42; Issue: 9 Linguagem: Inglês

10.1246/bcsj.42.2578

1348-0634

Tsutomu Kagiya, Shigeru Morita, Kenichi Fukui,

Thermal and Kinetic Analysis

Abstract The polymerization of acrolein initiated by the potassium persulfate-silver nitrate redox system in water was studied at 0°C from the point of view of kinetics. The potassium persulfate concentration was varied over the range from 15.75 to 157.5 mmol/l, and that of the initial monomer, from 0.462 to 2.675 mol/l, while the concentration of silver nitrate was 31.5 mmol/l. Both the polymerization rate and the molecular weight of the polymer were found to increase with the reaction time in the early stage, while in the stage of higher conversion the polymerization rate was gradually reduced and the molecular weight remained constant. In the early stage of the polymerization, the polymer yield showed a first-order dependence on the potassium persulfate and initial monomer concentrations. The molecular weight of the polymer was proportional to the monomer concentration, independent of the catalyst concentration. From these results, the kinetic features were discussed.