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LIM) ´ etait l'´ etude de polymères en ambiance humide avec gonflement, il a ´ eté par la suité etendù a la diffusion d'autres fluides. Le gonflement en présence d'un solvant (quelle que soit sa nature), s'il est contrarié, induit des contraintes quì a leur tour influent sur la quantité d'eau qui peutêtrepeutêtre absorbée. OnétudieOnétudie ici le cas de composites isotropes, renforcés par exemple par des particuleséquiaxesparticuleséquiaxes (d'aluminium ou billes de verre) Ces renforts n'absorbant pas l'eau, ils gênent le ,