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Polymerization of acrylonitrile initiated by thiourea-vanadium(V) redox system

✍ Scribed by Baishnab C. Singh; Triyama R. Mohanty; Padma L. Nayak

Publisher
Elsevier Science
Year
1976
Tongue
English
Weight
384 KB
Volume
12
Category
Article
ISSN
0014-3057

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✦ Synopsis

The kinetics of polymerization of acrylonitrile initiated by V 5 + thiourea or V 5+-ethylene thiourea have been studied at 30, 35 and 40Β°C in nitrogen. The rates of polymerization and V 5+ disappearance, and the chain lengths of polymers were measured. The kinetics are consistent with the formation of an intermediate complex between the thiol form of thiourea or ethylene thiourea and the oxidant decomposition of which leads to the initiating radical. The effects of certain organic solvents (water miscible) and salts on the rate of polymerization have been studied. A kinetic scheme has been proposed and the various rate and energy parameters evaluated.

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