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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Petrov, R. H. | Madrid |
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| Casati, R. |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Ali, M. A. |
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| Rančić, M. |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Delannoy, Romain
University of Birmingham
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (4/4 displayed)
- 2023Effect of physical and chemical ageing on barrier properties of epoxy coatingcitations
- 2022Structure–Properties Relationships Involved in the Embrittlement of Epoxiescitations
- 2022Macromolecular Mobility Changes Induced by Thermal Aging of Epoxy‐amine Polymer Networkscitations
- 2019Characterization of the ageing of an epoxy resin using high temperature nanoindentation ; Caractérisation du vieillissement d’une résine époxy par nanoindentation à haute températurecitations
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article
Macromolecular Mobility Changes Induced by Thermal Aging of Epoxy‐amine Polymer Networks
Abstract
International audience ; Changes in macromolecular mobility during the thermal oxidation of epoxy-amine thermoset networks are addressed in this study. Three epoxy-amine systems, cured with DGEBA and three similar aliphatic hardeners – ethylenediamine (EDA), diethylenetriamine (DETA), and triethylenetetramine (TETA) – aged at 160°C are characterized by dynamic mechanical analysis (DMA). Results show a split of the single initial α relaxation peak with aging, which may imply that chain scissions are preferred at certain oxidizable sites in the network. A β relaxation can be identified around -60°C and does not seem to evolve much with aging, while another sub-glass transition around 30°C decreases with it. Implications of this work both with mechanical fracture properties and with segmental mobility of radical chemical functions involved in bimolecular oxidation reactions have yet to be confirmed.