TY - JOUR
T1 - Enhanced Spin-capturing polymerization and radical coupling mediated by cyclic nitrones
AU - Ranieri, Kayte
AU - Conradi, Matthias
AU - Chavant, Pierre Yves
AU - Blandin, Veronique
AU - Barner-Kowollik, Christopher
AU - Junkers, Thomas
PY - 2012/9/17
Y1 - 2012/9/17
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84866058880&partnerID=8YFLogxK
U2 - 10.1071/CH12182
DO - 10.1071/CH12182
M3 - Article
AN - SCOPUS:84866058880
VL - 65
SP - 1110
EP - 1116
JO - Australian Journal of Chemistry
JF - Australian Journal of Chemistry
SN - 0004-9425
IS - 8
ER -