Living/controlled anionic polymerization and copolymerization of epichlorohydrin with tetraoctylammonium bromide-Triisobutylaluminum initiating systems
| Autor: | Stéphane Doutaz, Matthieu Gervais, Virginie Rejsek, Amélie Labbé, Alain Deffieux, Stéphane Carlotti |
|---|---|
| Přispěvatelé: | Laboratoire de Chimie des polymères organiques (LCPO), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Université Sciences et Technologies - Bordeaux 1-Institut de Chimie du CNRS (INC), Team 1 LCPO : Polymerization Catalyses & Engineering, Laboratoire de Chimie des Polymères Organiques (LCPO), Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC) |
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Polymers and Plastics
SOLID-ELECTROLYTE 02 engineering and technology 010402 general chemistry 01 natural sciences Ring-opening polymerization Inorganic Chemistry chemistry.chemical_compound Polymer chemistry Materials Chemistry Copolymer Epichlorohydrin CONDUCTIVITY MONOMER Organic Chemistry PROPYLENE-OXIDE ETHYLENE-OXIDE Solution polymerization 021001 nanoscience & nanotechnology 0104 chemical sciences ALKYLENE OXIDES CATALYST SYSTEM Monomer Anionic addition polymerization [CHIM.POLY]Chemical Sciences/Polymers chemistry Polymerization Tetraoctylammonium bromide POLYMERS EPOXIDES 0210 nano-technology |
| Zdroj: | International Journal of Biological Macromolecules International Journal of Biological Macromolecules, Elsevier, 2008, 41 (19), pp.7058-7062. ⟨10.1021/ma801422c⟩ |
| ISSN: | 0141-8130 |
| DOI: | 10.1021/ma801422c⟩ |
| Popis: | International audience; A weakly nucleophilic initiating system obtained by the combination of triisobutylaluminum and tetraoctylammonium bromide has been successfully used to achieve the controlled polymerization of epichlorohydrin (ECH) in hydrocarbon at temperatures ranging from -30 degrees C to room temperature. Besides the formation of a 1:1 aluminate complex of low nucleophilicity between the aluminum derivative and the tetraalkylammonium salt, the strategy consists of the formation of a strongly activating complex between the Lewis acid and the epoxide monomer. To that aim trialkylaluminum is added in slight excess with respect to the tetraalkylammonium salt ([i-BU3Al]/[NOct(4)Br] > 1). In these conditions the reactivity of ECH toward nucleophiles is strongly enhanced and the ring opening polymerization proceeds in the presence of weak nucleophiles leading to nonreacted chloromethyl function of the epichlorohydrin. This contrasts with conventional anionic polymerization, which requires much stronger nucleophiles for the ring opening. Fast and controlled polymerization of ECH up to high molar masses and the synthesis of random and block copolymers with propylene oxide were readily achieved. |
| Databáze: | OpenAIRE |
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