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Environmental ageing of aerospace epoxy adhesive in bonded assembly configuration

Caussé, Nicolas and Dantras, Eric and Tonon, Claire and Chevalier, Mathieu and Combes, Hélène and Guigue, Pascale and Lacabanne, Colette Environmental ageing of aerospace epoxy adhesive in bonded assembly configuration. (2013) Journal of Thermal Analysis and Calorimetry, 114 (2). 621-628. ISSN 1388-6150

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Official URL: http://dx.doi.org/10.1007/s10973-013-3009-3

Abstract

Aerospace epoxy adhesive has been subjected to various environmental ageing processes. A comparative study is performed between ageing under vacuum and atmospheric pressure for various ageing temperatures. The macroscopic behaviour of the assemblies is investigated by single lap shear test. Glass transition temperature of the bulk adhesive is followed by differential scanning calorimetry. Molecular mobility of the adhesive in service configuration is studied by dynamic dielectric spectroscopy. No significant difference is noticed due to an ageing under vacuum. A comparison between test results after each isotherm ageing highlights the temperature influence. For ageing of adhesive in a vitreous state, the crosslink density increases. For ageing of adhesive in a rubbery state, a severe decrease of glass transition is observed. The influence of additives and physical ageing is null. This plasticisation effect might be associated with the homogenisation of the structure of epoxy due to the molecular mobility of loose chains.

Item Type:Article
Additional Information:Thanks to Springer editor. The definitive version is available at http://link.springer.com The original PDF of the article can be found at Journal of Thermal Analysis and Calorimetry website : http://dx.doi.org/10.1007/s10973-013-3009-3
HAL Id:hal-01136617
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National d'Études Spatiales - CNES (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > EADS - Astrium (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:15 Jan 2014 12:58

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