Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

A concentration-dependent diffusion coefficient model for water sorption in composite

Abstract : The phenomenon of diffusion coefficients depending on concentration has been observed and studied experimentally for many years. This is particularly the case for the inter-diffusion in metals [1] but has also been observed on various polymeric systems [2]. This study presents a concentration-dependent diffusion coefficient model for water sorption in a polymer matrix composite. It has been developed by studying the water uptake of a polyphthalamide short glass fiber reinforced material. According to experimental data, we postulate that the diffusion coefficient follows a modified Arrhenius equation with a concentration dependence of the pre-exponential factor but also of the activation energy. This choice is related to the evolution of the glass transition temperature during sorption, which has a profound influence on transport properties. The coupled partial differential equation of the model is solved for some applied examples by using an easy-to-implement finite difference scheme.
Type de document :
Article dans une revue
Liste complète des métadonnées

https://hal-mines-paristech.archives-ouvertes.fr/hal-00904085
Contributeur : Bibliothèque Umr7633 <>
Soumis le : mercredi 13 novembre 2013 - 16:45:50
Dernière modification le : jeudi 24 septembre 2020 - 18:30:04

Identifiants

Citation

Sébastien Joannès, Laurent Mazé, Anthony R. Bunsell. A concentration-dependent diffusion coefficient model for water sorption in composite. Composite Structures, Elsevier, 2014, 108, pp.111-118. ⟨10.1016/j.compstruct.2013.09.007⟩. ⟨hal-00904085⟩

Partager

Métriques

Consultations de la notice

421