Monitoring and simulations of hydrolysis in epoxy matrix composites during hygrothermal aging
TypeArticles dans des revues avec comité de lecture
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 epoxy network. Our results demonstrated that the polymer matrix undergoes hydrolysis. We found that the chemical species involved in the reaction process was the residual anhydride groups. These results support the physical basis of the three-dimensional (3D) diffusion/reaction model. We finally showed that this model is able to reproduce multi-cycle sorption/desorption experiment, as well as water uptake in hybrid metal/epoxy samples. We simulated the 3D distributions of the diffusing water and the reacted water.
Showing items related by title, author, creator and subject.
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 ...
LUBINEAU, Gilles; SULAIMANI, Anwar; EL YAGOUBI, Jalal; MULLE, Matthieu; VERDU, Jacques (Elsevier, 2017)Monitoring changes in electrical conductivity is a simple way to assess the water uptake from environmental moisture in polymers. However, the relation between water uptake and changes in conductivity is not fully understood. ...
Thermomechanical and hygroelastic properties of an epoxy system under humid and cold-warm cycling conditions EL YAGOUBI, Jalal; LUBINEAU, Gilles; SAGHIR, Shahid; VERDU, Jacques; ASKARI, Abe (ELSEVIER, 2014)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 ...
LORRETTE, Christophe; EL YAGOUBI, Jalal; COUPE, Aurélie; CATY, Olivier; SAUDER, Cédric; BATSALE, Jean-Christophe (Société Française de Thermique / Congrès Français de Thermique - Thermique en conditions extrêmes, 29 mai - 1er juin 2012, Bordeaux, 2012)L'accès aux propriétés thermiques des matériaux composites thermostructuraux destinés aux applications nucléaires est un enjeu important pour prévoir leur comportement en condition d'utilisation. Dans un objectif prévisionnel ...
DEFAUCHY, Virginie; LE GAC, Pierre Yves; GUINAULT, Alain; VERDU, Jacques; RECHER, Gilles; DROZDZAK, Renata; RICHAUD, Emmanuel (Elsevier, 2017)The in situ thermal oxidation of thin unstabilized polydicyclopentadiene was studied by TGA to monitor mass gain, and DSC to characterize hydroperoxides concentration. Results were discussed using kinetic analysis, which ...