Enhanced Spin-capturing polymerization and radical coupling mediated by cyclic nitrones

Ranieri, K., Conradi, M., Chavant, P. Y., Blandin, V., Barner-Kowollik, C., & Junkers, T. (2012) Enhanced Spin-capturing polymerization and radical coupling mediated by cyclic nitrones. Australian Journal of Chemistry, 65(8).

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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. © 2012 CSIRO.

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ID Code: 99319
Item Type: Journal Article
Refereed: Yes
Additional Information: Cited By :9 Export Date: 5 September 2016 CODEN: AJCHA Correspondence Address: Barner-Kowollik, C.; Preparative Macromolecular Chemistry, Institut für Technische Chemie und Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstrasse 18, 76128 Karlsruhe, Germany; email: christopher.barner-kowollik@kit.edu
Keywords: Addition rate, Alkoxyamines, Cyclic nitrones, Monomer conversions, Nitrones, Radical coupling, Radical coupling reactions, Trapping rate, Bromine, Functional polymers, Oligomers, Polystyrenes, Styrene, Polymerization
DOI: 10.1071/CH1218210.1039/C0PY00377H; Wong, E.H.H., Junkers, T., Barner-Kowollik, C., (2008) J. Polym. Sci. A Polym. Chem., 46, p
ISSN: 00049425
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 22 Sep 2016 04:50
Last Modified: 04 Oct 2016 23:40

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