Polyester from dimethylketene and acetaldehyde: Direct copolymerization and β‐lactone ring‐opening polymerization
| Autor: | Marc Brestaz, Guillaume Le, Nicolas Desilles, Claude Bunel |
|---|---|
| Přispěvatelé: | Polymères Biopolymères Surfaces (PBS), Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Institut Normand de Chimie Moléculaire Médicinale et Macromoléculaire (INC3M), Institut de Chimie du CNRS (INC)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Université Le Havre Normandie (ULH), Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Université Le Havre Normandie (ULH), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS), Polymères, biopolymères, membranes (PBM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU) |
| Rok vydání: | 2011 |
| Předmět: |
chemistry.chemical_classification
Polymers and Plastics 010405 organic chemistry Chemistry Organic Chemistry Polymer 010402 general chemistry 01 natural sciences Ring-opening polymerization 0104 chemical sciences 3. Good health Polyester Crystallinity [CHIM.POLY]Chemical Sciences/Polymers Differential scanning calorimetry Anionic addition polymerization Polymerization Polymer chemistry Materials Chemistry Copolymer ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Journal of Polymer Science Part A: Polymer Chemistry Journal of Polymer Science Part A: Polymer Chemistry, Wiley, 2011, pp.n/a-n/a. ⟨10.1002/pola.24854⟩ |
| ISSN: | 1099-0518 0887-624X |
| Popis: | Two ways to obtain aliphatic polyesters (PEs) from dimethylketene and acetaldehyde were investigated. On the one hand, a direct anionic copolymerization was carried out in toluene at −60 °C. The resulting polymer was mainly composed of PE units. On the other hand, a two-step process involving the synthesis of 3,3,4-trimethyl-2-oxetanone by [2+2] cycloaddition, followed by its ring-opening polymerization, with various initiators and solvents, led to the expected PE. Molecular weights up to 9000 g mol−1 (measured by nuclear magnetic resonance (NMR)), with narrow polydispersity around 1.2, were obtained. These polymers were found stable up to 274 °C under nitrogen and a broad and complex endothermic peak attributed to crystallinity was observed near 139 °C by differential scanning calorimetry (DSC). The crystallinity, measured by X-ray diffraction, was close to 0.45. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011 |
| Databáze: | OpenAIRE |
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