Polyamide-6 structuration induced by a chemical reaction with a polyether triamine in the molten state
| Autor: | René Fulchiron, N. Garois, Guillaume Sudre, F. Da Cruz Boisson, Mathilde Auclerc, A. Vanhille Bergeron, Véronique Bounor-Legaré, Philippe Cassagnau, Adrien Tauleigne |
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| Přispěvatelé: | Hutchinson Polymers, Ingénierie des Matériaux Polymères (IMP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), CNRS Laboratoire des Materiaux Organiques (LMO), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet [Saint-Étienne] (UJM)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Polymers and Plastics Small-angle X-ray scattering Organic Chemistry 02 engineering and technology Reactive extrusion [CHIM.MATE]Chemical Sciences/Material chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Amorphous solid [CHIM.POLY]Chemical Sciences/Polymers Chemical engineering Desorption Polyamide Materials Chemistry Molecule [CHIM]Chemical Sciences Lamellar structure 0210 nano-technology Glass transition ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Polymer Polymer, Elsevier, 2019, 172, pp.339-354. ⟨10.1016/j.polymer.2019.03.033⟩ |
| ISSN: | 0032-3861 |
| DOI: | 10.1016/j.polymer.2019.03.033⟩ |
| Popis: | Polyamide-6 was modified by reactive extrusion using a triamine as a structuring agent. To scrutinize the reactive medium after the chemical modification and to characterize the new structures obtained, the coupling of several physico-chemical analyses was necessary and applied to either model molecules or polyamide chain. By correlation of liquid NMR, matrix assisted laser desorption ionisation/time of flight mass spectrometry (MALDI-ToF MS), and size-exclusion chromatography (SEC) analyses, it was possible to observe both grafting and polyamide chain scissions that led to randomly branched and linear molecules. One of the most noticeable modifications regarding the properties was a decrease in the amorphous phase mobility with a very small amount of triamine (0.7 wt%). A comprehensive study by X-ray scattering techniques (small and wide angle X-ray scattering, SAXS and WAXS, respectively) allowed us to highlight the noticeable size evolution of the crystalline and amorphous parts at the lamellar scale. In conclusion, these multi-scale experiments demonstrate the possibility of modifying the amorphous phase mobility by controlling the nanostructure morphology of the material, particularly the crystalline lamellae thickness and the rigid amorphous fraction (RAF) content. Thus, an increase in the RAF content of around 6 % induced more restricted mobility in the amorphous phase as the glass transition temperature (Tg) shifted to higher temperature (≈ + 7 °C). |
| Databáze: | OpenAIRE |
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