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The nitrocellulose based materials are degraded in a natural way during their storage; the processes of degradation are accelerated when the temperature or the humidity increases. To prevent this decomposition, these materials include in their composition stabilising agents which retain the nitro groups and avoid the auto-catalytic degradation of nitrocellulose. The aim of the present work is to improve our understanding of the basic mechanisms of the degradation of the nitrocellulose based materials and the way in which their stabilization evolves. Solid–liquid phase equilibrium for the binary system of (N-(2-acetoxyethyl)-p-nitroaniline (1) + N-ethyle-4-nitrooaniline (2)) is determined using DSC technique. The experimental results were correlated using Wilson and UNIQUAC models. As results, the system studied presents a simple eutectic, where the components are not miscible in the solid phase. Important deviations between experimental and predicted values are observed in the case of ideal model. These deviations can be attributed to the complexity of our system and principally to the presence of intermolecular effects. The best description of SLE was given by the two parameters UNIQUAC

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Experimental determination and prediction of solid-liquid phase equilibria for binary (N-(2-acetoxyethyl)-p-nitroaniline (1) + N-ethyle-4-nitroaniline (2)) mixture