✦ LIBER ✦

The application of moderated copolymerization to the determination of specific velocity constants for termination by metal ions

✍ Scribed by A.D. Jenkins; B.H. Mustafa

Publisher: Elsevier Science
Year: 1983
Tongue: English
Weight: 624 KB
Volume: 19
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(83)90065-4

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✦ Synopsis

The moderated copolymerization technique, for the determination of the values of velocity constants for very fast radical reactions, is applied to termination processes in polymerizations in the presence of transition-metal ions containing the metal in a high oxidation state. With styrene as the active monomer and methyl methacrylate as the vehicle, copolymerization rates in the presence of iron(III) chloride are analysed on three kinetic models to provide an accurate value for the rate constant for the reaction of polystyryl radicals with the salt at 60°: the value obtained is 7.7 x I04M 1 sec-I.

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