Enhanced Spin-capturing polymerization and radical coupling mediated by cyclic nitrones

Kayte Ranieri, Matthias Conradi, Pierre Yves Chavant, Veronique Blandin, Christopher Barner-Kowollik, Thomas Junkers

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14 Citations (Scopus)

Abstract

A series of cyclic nitrones have been tested for their spin-trapping activity in the enhanced spin-capturing polymerization of styrene and in nitrone-mediated radical coupling reactions. rac-2-Isopropyl-2,3-dimethyl-1-oxy- 2,3-dihydro-imidazol-4-one was found to be the most efficient nitrone. The specific polystyrene macroradical addition rate to this nitrone was determined to be 8.010 3Lmol -1s -1, which is by a factor of 10 higher than for previously studied compounds. Via enhanced spin-capturing polymerization, polymers in the range of oligomers to 30000gmol -1 were obtained. A strong dependence of molecular weight on monomer conversion was observed, which can be explained by the high trapping rate. In nitrone-mediated radical coupling, almost ideal coupling of bromine-functional polymers was obtained and the successful introduction of the residual alkoxyamine functionality confirmed.

Original languageEnglish
Pages (from-to)1110-1116
Number of pages7
JournalAustralian Journal of Chemistry
Volume65
Issue number8
DOIs
Publication statusPublished - 17 Sep 2012
Externally publishedYes

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