The study of free radical polymerization of acrylonitrile by oxidation–reduction system using potassium persulfate–thiourea in aqueous medium

Nagaraja, G. K. and Demappa, T. and Mahadevaiah (2008) The study of free radical polymerization of acrylonitrile by oxidation–reduction system using potassium persulfate–thiourea in aqueous medium. Journal of Applied Polymer Science, 110 (6). pp. 3395-3400. ISSN 1097-4628

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Abstract

Abstract The polymerization kinetics of acrylonitrile (AN) with the potassium persulfate (K2S2O8)/thiourea redox system has been investigated volumetrically in an aqueous medium in the temperature range of 40–80°C. The rate of polymerization (Rp) and rate of K2S2O8 disappearance have been measured. The effects of some water-miscible organic solvents, cationic, anionic, nonionic surfactants, and complexing agents on the Rp were investigated. The temperature dependence of the rate was studied, and the activation parameters were computed using the Arrhenius and Eyring plots. The effects of organic solvents on polymerization were also investigated. All of them depressed both the initial rate and limiting conversion. A mechanism consistent with the experimental data involving K2S2O8–thiourea complex formation, which generates free radicals, is suggested. Molecular weight of the polymer was determined by viscometry. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008

Item Type:	Article
Uncontrolled Keywords:	acrylonitrile, potassium persulfate–thiourea, redox system, activation energy
Subjects:	M Polymer Science > Polymer Science
Divisions:	PG Centre Mandya > Polymer Science
Depositing User:	Manjula P Library Assistant
Date Deposited:	31 Aug 2019 07:14
Last Modified:	31 Aug 2019 07:14
URI:	http://eprints.uni-mysore.ac.in/id/eprint/7447

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