Electron spin resonance studies of reversible addition-fragmentation transfer polymerisation

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dc.contributor.authorCalitz F.M.
dc.contributor.authorTonge M.P.
dc.contributor.authorSanderson R.D.
dc.date.accessioned2011-05-15T15:57:12Z
dc.date.available2011-05-15T15:57:12Z
dc.date.issued2003
dc.description.abstractThe polymerisation of styrene in the presence of cumyl dithiobenzoate (RAFT agent) was studied. Electron spin resonance spectroscopy was used to determine the time-dependence of the concentrations of the intermediate radical species, as a function of temperature and relative initial amounts of reactants. The intermediate radical concentration was found to be much lower than predicted by the studies of Barner-Kowollik et al. [Barner-Kowollik, C.; Quinn, J. F.; Morsley, D. R.; Davis, T. P. J. Polym. Sci. Part A: Polym. Chem. 2001, 39, 1353], but consistent with that observed by Hawthorne et al. [Hawthorne, D. G.; Moad, G.; Rizzardo, E.; Thang, S. H. Macromolecules 1999, 32, 5457] and Kwak et al. [Kwak, Y.; Goto, A.; Tsuji.; Murata, Y.; Komatsu, K.; Fukuda, T. Macromolecules 2002, 35, 3026] Several observations that are not consistent with the current RAFT model were made. Intermediate radical signals were observed long after a significant amount of initiator remained and an extra signal appeared in the ESR spectrum at longer reaction times.
dc.description.versionConference Paper
dc.identifier.citationMacromolecular Symposia
dc.identifier.citation193
dc.identifier.issn10221360
dc.identifier.other10.1002/masy.200390059
dc.identifier.urihttp://hdl.handle.net/10019.1/10271
dc.subjectFree radical polymerization
dc.subjectInitiators (chemical)
dc.subjectMacromolecules
dc.subjectParamagnetic resonance
dc.subjectSpectrum analysis
dc.subjectIntermediate radical species
dc.subjectStyrene
dc.subjectbenzoic acid derivative
dc.subjectcumyl dithiobenzoate
dc.subjectradical
dc.subjectstyrene
dc.subjectunclassified drug
dc.subjectchemical reaction
dc.subjectchemical structure
dc.subjectconference paper
dc.subjectelectron spin resonance
dc.subjectkinetics
dc.subjectpolymerization
dc.subjectreaction time
dc.subjecttemperature
dc.subjecttime
dc.titleElectron spin resonance studies of reversible addition-fragmentation transfer polymerisation
dc.typeConference Paper
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