Catalytic chain transfer polymerization of methyl methacrylate in supercritical carbon dioxide: evidence for a diffusion-controlled transfer process

Darren J. Forster, Johan P.A. Heuts, Frank P. Lucien, Thomas P. Davis

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33 Citations (Scopus)

Abstract

The mechanism of catalytic chain transfer polymerization with methyl methacrylate was studied in a range of media. The chain transfer reaction in supercritical CO2 was found to be significantly enhanced compared with similar experiments in toluene or in bulk methyl methacrylate. The results are consistent with a diffusion-controlled rate-determining step in the transfer process with cobaloxime catalysts. The gaslike viscosities in the supercritical medium result in an approximate chain transfer coefficient (ktr) of 108 L mol-1 s-1: an order of magnitude higher than values obtained in conventional organic solvents.

Original languageEnglish
Pages (from-to)5514-5518
Number of pages5
JournalMacromolecules
Volume32
Issue number17
DOIs
Publication statusPublished - 24 Aug 1999
Externally publishedYes

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