Tracing Arm-Growth Initiation in Z-RAFT Star Polymerization by NMR: The Impact of the Leaving R-Group on Star Topology
2008 | journal article. A publication with affiliation to the University of Göttingen.
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Tracing Arm-Growth Initiation in Z-RAFT Star Polymerization by NMR: The Impact of the Leaving R-Group on Star Topology
Boschmann, D.; Maenz, M.; Poeppler, A.-C.; Soerensen, N. & Vana, P. (2008)
Journal of Polymer Science Part A Polymer Chemistry, 46(21) pp. 7280-+. DOI: https://doi.org/10.1002/pola.23032
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Details
- Authors
- Boschmann, Daniel; Maenz, Martin; Poeppler, Ann-Christin; Soerensen, Nicolai; Vana, Philipp
- Abstract
- Arm-growth initiation in six-armed Z-RAFT star polymerization of styrene-d(8) was followed via the disappearance of H-1 NMR signals of the leaving group at their original position. These measurements revealed a dramatic impact of the leaving group on star polymer topology. Phenylethyl as leaving group induced formation of completely initiated stars already after 8% of monomer conversion. Benzyl as leaving group, however, drastically slows down arm-growth initiation, resulting in fully initiated star polymers only after about 60% of monomer conversion. Below that value, star-polystyrene of the expected topology cannot be generated with benzyl as leaving group. [Color figure can be viewed in the online issue, which is available at www.interscience.wiley.com.] Published online 25 September 2008
- Issue Date
- 2008
- Status
- published
- Publisher
- John Wiley & Sons Inc
- Journal
- Journal of Polymer Science Part A Polymer Chemistry
- ISSN
- 0887-624X
- Sponsor
- Deutsche Forschungsgemeinschaft [VA226/3]; DFG
