Absorption et désorption de l’eau liquide par un polymère superabsorbant: Séchage d’un gel par chauffage conventionnel et sous champ micro-onde

The study of the kinetic dryness of a swollen polymer has shown that the reactions performed under pressure of water vapour are generally more quick than those realised under controlled air and pressure. The nature of the gassing the atmosphere modifies the influence of parameters (temperature and pressure) on the kinetic reaction. The use of higher masses permits a complete modification of the kinetic regime which limits the dryness reaction: it moves from a phenomena controlled by the evaporation followed by a tridimentional diffusion of the small masses, to a phenomena governed by a tridimentional diffusion of the high masses heated conventionally. To examine l’effect of microwave field, we have dry a swollen polymer under a microwave field. The analysis of the results shows that the field interacts with the polymer, which provokes its degradation in the case where the employed forces are crucial (up to 100 W).