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Redox polymerization of acrylonitrile. Kinetics of the reaction initiated by systems based on cyanoacetic acid/Mn(III) complexes in dimethylsulphoxide

✍ Scribed by M. Haragopal; A. Jayakrishnan; V. Mahadevan

Publisher: Elsevier Science
Year: 1982
Tongue: English
Weight: 331 KB
Volume: 18
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(82)90051-9

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✦ Synopsis

The kinetics of polymerization of acrylonitrile initiated by the redox systems cyanoacetic acid/Mn(OAc)3 and cyanoacetic acid/tris(benzoylacetonato)manganese(llI) in dimethylsulphoxide as solvent have been investigated over the range 20-35L The kinetics of oxidation are consistent with the formation of intermediate complexes between the reactants, followed by electron transfer. Manganous ions inhibit the reaction by competitive complexation. The primary radicals are very efficient as initiators of polymerization which is terminated by mutual interaction of macroradicals. Mechanisms have been proposed to explain the kinetics; rate and equilibrium constants have been evaluated.

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