Structural evolution of a constrained epoxy functional polyethylene network crosslinked by a bio-based reactant
| Autor: | Yannick Goutille, Philippe Cassagnau, Françoise Fenouillot, Laurent Keromnes, Philippe Chaumont, Ruben Briceno Garcia |
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| Přispěvatelé: | Ingénierie des Matériaux Polymères (IMP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon |
| Rok vydání: | 2014 |
| Předmět: |
Aging
Materials science Polymers and Plastics General Physics and Astronomy Epoxide macromolecular substances 02 engineering and technology 010402 general chemistry 01 natural sciences chemistry.chemical_compound Copolymer Polymer chemistry Materials Chemistry Fourier transform infrared spectroscopy Bond cleavage Crosslinking Organic Chemistry Relaxation (NMR) [CHIM.MATE]Chemical Sciences/Material chemistry Epoxy Polyethylene 021001 nanoscience & nanotechnology 0104 chemical sciences [CHIM.POLY]Chemical Sciences/Polymers chemistry Covalent bond visual_art visual_art.visual_art_medium Thermoporosimetry 0210 nano-technology |
| Zdroj: | European Polymer Journal European Polymer Journal, Elsevier, 2014, 61, pp.186-196. ⟨10.1016/j.eurpolymj.2014.10.003⟩ |
| ISSN: | 0014-3057 1873-1945 |
| DOI: | 10.1016/j.eurpolymj.2014.10.003 |
| Popis: | International audience; Epoxy-ethylene copolymers were thermally crosslinked by using an amino-acid agent to create covalent cross-links between epoxide functions. Two different systems were studied: a pre-constrained network and a non-constrained one. Samples were aged for 6, 16 and 24 h. The study of the network structure before and during the aging was,done by different techniques such as: swelling ratio measurement, Fourier transform infrared spectroscopy (FTIR) and thermoporosimetry analysis. For the constrained-network system two different mechanisms of aging have been identified: a chain scission phenomenon during the first 6 h and a cross-linking effect in the latest stages. Chain scission was found to be probably related to the increasing of the rate of the C-C breaking during thermo-oxidative aging as a consequence of a heterogeneous structure formed when crosslinking takes place before relaxation. On the other hand, crosslinking reactions in the latest hours of aging were attributed to reactions of etherification between epoxy and hydroxyl functions as well as the thermo-oxidation of ethylenic chains. |
| Databáze: | OpenAIRE |
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