Buback, Michael M.

[["dc.bibliographiccitation.firstpage","2474"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","Macromolecules"],["dc.bibliographiccitation.lastpage","2480"],["dc.bibliographiccitation.volume","44"],["dc.contributor.author","Meiser, Wibke"],["dc.contributor.author","Barth, Johannes"],["dc.contributor.author","Buback, Michael"],["dc.contributor.author","Kattner, Hendrik"],["dc.contributor.author","Vana, Philipp"],["dc.date.accessioned","2018-11-07T08:56:56Z"],["dc.date.available","2018-11-07T08:56:56Z"],["dc.date.issued","2011"],["dc.description.abstract","The kinetics of reversible addition fragmentation chain transfer (RAFT) polymerization of butyl acrylate with ethyl S-thiobenzoyl-2-thiopropionate (ETTP) as the RAFT agent has been studied. The concentrations of propagating (P-center dot) and intermediate radicals (INT\") were measured via highly time-resolved EPR spectroscopy after initiation by a laser single pulse. Predici simulation of experimental data results in rate coefficients for -40 degrees C of k(ad) = (1.4 +/- 0 4) x 10(6)L mol(-1) s(-1), k(beta) = (4.7 +/- 1.5) s(-1), and k(t)(cross) = 0.25 x k(upsilon), where k(t) is the rate coefficient for termination of two P-center dot species. Fast fragmentation of the intermediate radical is thus observed at this low temperature. Measuring the ratio of INT center dot to P-center dot concentrations during stationary polymerization at -40 and -70 degrees C yields K-eq = k(ad)/k(beta) values of (2.3 +/- 0.6) x 10(5) and 75 +/- 15 L mol(-1), respectively, which correspond to an apparent activation energy difference, E-A(k(ad)/k(beta)), of -49.5 kJ mol(-1)."],["dc.description.sponsorship","Fonds der Chemischen Industrie"],["dc.identifier.doi","10.1021/ma102491x"],["dc.identifier.isi","000289593200013"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/9445"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/23267"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Chemical Soc"],["dc.relation.issn","0024-9297"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","EPR Measurement of Fragmentation Kinetics in Dithiobenzoate-Mediated RAFT Polymerization"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]