Determination of addition and fragmentation rate coefficients in RAFT polymerization via time-resolved ESR spectroscopy after laser pulse initiation

Michael Buback, Pascal Hesse, Thomas Junkers, Philipp Vana

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A method for simultaneous determination of both the addition and fragmentation rate coefficients of the RAFT equilibrium reactions is presented, which is based on laser single pulse initiation in conjunction with microsecond time-resolved ESR spectroscopy. The build-up and subsequent decay in concentration of the intermediate radical are measured and kad and kβ values are deduced from fitting the concentration versus time profiles to simple kinetic models.

Original languageEnglish
Pages (from-to)182-187
Number of pages6
JournalMacromolecular Rapid Communications
Issue number3
Publication statusPublished - 3 Feb 2006
Externally publishedYes


  • Kinetics (polym.)
  • Laser-induced polymerization
  • Reversible addition fragmentation chain transfer (RAFT)

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