Living radical polymerization with reversible addition-fragmentation chain transfer (RAFT): direct ESR observation of intermediate radicals

David G. Hawthorne, Graeme Moad, Ezio Rizzardo, San H. Thang

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Abstract

Electron spin resonance (ESR) measurements were for performed by placing degassed solutions containing freshly distilled monomer, dimethyl 2,2′-azobis (isobutyrate) (AIBMe) initiator, RAFT agent, and benzene in the preheated cavity of the ESR spectrometer at 90°C. ESR spectra were obtained at 1 min intervals. Analysis of the obtained spectra indicate that ESR enables direct observations of the intermediate radicals that form during RAFT polymerizations.

Original languageEnglish
Pages (from-to)5457-5459
Number of pages3
JournalMacromolecules
Volume32
Issue number16
DOIs
Publication statusPublished - 10 Aug 1999

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