Thermomechanical and hygroelastic properties of an epoxy system under humid and cold-warm cycling conditions
TypeArticles dans des revues avec comité de lecture
In this paper, we study the hygrothermal aging of an anhydride-cured epoxy under temperature and hygrometry conditions simulating those experienced by an aircraft in wet tropical or subtropical regions. Gravimetric and dimensional measurements were performed and they indicate that there are three stages in this aging process: the first one, corresponding to the early cycles can be called the “induction stage”. The second stage of about 1000 cycles duration, could be named the “swelling stage”, during which the volume increase is almost equal to the volume of the (liquid) water absorbed. Both the first and second stages are accompanied by modifications of the mechanical properties and the glass transition temperature. During the third (“equilibrium”) stage, up to 3000 cycles, there is no significant change in the physical properties despite the continuous increase of water uptake. This can be explained by the fact that only physically sorbed water can influence physical properties.
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A fully coupled diffusion-reaction scheme for moisture sorptionedesorption in an anhydride-cured epoxy resin EL YAGOUBI, Jalal; LUBINEAU, Gilles; ROGER, Frederic; VERDU, Jacques (ELSEVIER, 2012)Thermoset materials frequently display non-classical moisture sorption behaviors. In this paper, we investigated this issue from an experimental point of view as well as in terms of modeling the water transport. We used ...
EL YAGOUBI, Jalal; LUBINEAU, Gilles; TRAIDIA, Abderrazak; VERDU, Jacques (Elsevier, 2014)In this paper, we studied the water transport in thermoset matrices. We used Fourier Transform Infrared analysis (FTIR) during sorption/desorption experiments to investigate the interaction between sorbed water and the ...
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