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Non-ideality in vinyl polymerization—VII: Detailed mathematical analysis of retarded polymerizations

✍ Scribed by P.C. Deb

Book ID
103073344
Publisher
Elsevier Science
Year
1980
Tongue
English
Weight
221 KB
Volume
16
Category
Article
ISSN
0014-3057

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✦ Synopsis

Abslract--Mathematical formulations that have previously been developed for treatment of retarded polymerization do not take into account the effect of primary radical transfer whereby a primary radical generated by spontaneous decomposition of initiator reacts with a retarder molecule. It is tacitly assumed that, because of low concentration of primary radicals, such reactions are of little significance. There are however published data showing that the transfer constant of a conventional retarder/ inhibitor with respect to primary radical may be much higher than that with respect to a macro-radical. The neglect of primary radical transfer is thus open to question. This communication presents mathematical analysis of retarded polymerization considering both primary and macro-radical transfer. It is found that one can obtain all the relevant constants from kinetic data alone without recourse to tracer techniques or molecular weight measurements.

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