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Titre: | Water Uptake Of Polymer/clay Nanocomposites: Model Development |
Auteur(s): | Kouini, B. Ouslimani, N. |
Mots-clés: | Polymer/nanocomposites Nanoclay Water uptake Fick’s la |
Date de publication: | 2019 |
Editeur: | Université M'Hamed Bougara Boumerdes |
Collection/Numéro: | Algerian Journal of Environmental Science and Technology/ Vol. 5, N°1 (2019);pp. 909-911 |
Résumé: | Numerous models have been proposed for modeling water diffusion behavior in polymers and polymer composites. The most common approach is to apply Fick’s law to simple single-free-phase diffusion, due to its simplicity and mathematical tractability [1]. However, it has been demonstrated that diffusion of water in some glassy polymers is anomalous (non-Fickian). Two main approaches are proposed to model the anomalous diffusion. One is the Langmuir-type model for diffusion (LMD), assuming that absorbed water molecules consist of mobile and bound phases [2,3]; the other is the diffusion with time-varying diffusivity model (DTVD), where a constant coefficient of diffusion is replaced by a decreasing function of time (by analogy with a relaxation modulus for a viscoelastic solid) [4,5]. Several models have been proposed to predict the behavior of composites based on the analogy between thermal conductivity and diffusivity [6,7]. The most extensively cited model in polymer/clay nanocomposites is the Nielsen model, which predicts that relative permeability is only a function |
URI/URL: | https://www.asjp.cerist.dz/en/article/120475 http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/12513 |
ISSN: | 2478-0030 |
Collection(s) : | Publications Nationales
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