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N,N′-Methylenebisacrylamide polymerization initiated by Ce(IV)—Malic acid redox system—A kinetic study

✍ Scribed by Rima Das; Kunj Behari; Uma Agrawal

Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
319 KB
Volume
31
Category
Article
ISSN
0959-8103

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✦ Synopsis

Abstract

Free‐radical‐initiated linear cyclopolymerization of a symmetrical non‐conjugated divinyl monomer, viz. N,N'‐methylenebisacrylamide, was carried out using cerium sulphate as initiator and malic acid as activator, in an inert atmosphere at 25 ± 0.1°C. A gel‐free polymer was formed under the experimental conditions. The order with respect to malic acid and monomer was found to be 1 and 2, respectively. The rate of polymerization was found to be inversely proportional to the concentration of Ce(IV). The overall energy of activation was found to be 25.5 kJ mol^−1^. An intramolecular cyclization prior to propagation is proposed in formulating a suitable mechanism to explain the kinetic results.

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