Abstract
The authors present a 3D gaseous transfer model and a simplified mechanical model. Thermal ageing and average volume change of ozone depletion potential foams with different facings are addressed. A formula has been suggested to correlate the elastic modulus and the reduced density of rigid foams over the whole foam density range. Les auteurs présentent un modèle tridimensionnel de transfert gazeux et un modèle mécanique simplifié. Ils traitent du vieillissement thermique et de la modification volumique moyenne de produits mousse à pouvoir d'appauvrissement de la couche d'ozone, en fonction de leur revêtement; et proposent une formule permettant d'établir une corrélation entre le module élastique et la densité réduite des mousses rigides sur la plage complète de densit´ de mousse.
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