A Step Towards High-Molecular-Weight Living/Controlled Polystyrene Using SG1-Mediated Polymerization
| Autor: | Sylvain R. A. Marque, Didier Gigmes, Denis Bertin, Anouk Gaudel-Siri, Yohann Guillaneuf, Muriel Lansalot, Benoit Luneau, Paul Tordo, Pierre-Emmanuel Dufils, Sébastien Acerbis |
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| Přispěvatelé: | Laboratoire Chimie Provence (LCP), Centre National de la Recherche Scientifique (CNRS)-Université de Provence - Aix-Marseille 1-Institut de Chimie du CNRS (INC), ARKEMA, Université de Provence - Aix-Marseille 1-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2010 |
| Předmět: |
Nitroxide mediated radical polymerization
Polymers and Plastics Bulk polymerization high molecular weight General Chemical Engineering Radical polymerization 02 engineering and technology polystyrene 010402 general chemistry 01 natural sciences chemistry.chemical_compound controlled radical polymerization (CRP) Polymer chemistry computer modeling chemistry.chemical_classification living polymerization Solution polymerization General Chemistry Polymer 021001 nanoscience & nanotechnology 0104 chemical sciences [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry [CHIM.POLY]Chemical Sciences/Polymers chemistry Polymerization Living polymerization Polystyrene 0210 nano-technology |
| Zdroj: | Macromolecular Reaction Engineering Macromolecular Reaction Engineering, Wiley-VCH Verlag, 2010, 4, pp.403. ⟨10.1002/mren.200900074⟩ Macromolecular Reaction Engineering, 2010, 4, pp.403. ⟨10.1002/mren.200900074⟩ |
| ISSN: | 1862-8338 1862-832X |
| DOI: | 10.1002/mren.200900074 |
| Popis: | International audience; The synthesis of high-molecular-weight living/controlled polystyrene by NMP was studied. The combination of Ac2O and alkoxyamines based on nitroxides TEMPO, TIPNO, and SG1 was tested at 130°C. With TEMPO and TIPNO, dipole/dipole interactions led to a decrease in nitroxide concentration and an acceleration of the reaction. To minimize thermal autoinitiation and thus obtain high-Mn PS, the temperature was lowered. At 90°C, the use of BlocBuilder yielded PS of Mn=210 000 g mol-1 with a living fraction of 60%. Finally, new SG1-based nitroxides were used to perform the polymerization at 75°C. Since these nitroxides were too constrained, the decrease in kc caused a loss of control and livingness for high-Mn polymers. |
| Databáze: | OpenAIRE |
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