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Solid–Liquid Phase Equilibria, Molecular Interaction and Microstructural Studies on (N-(2-ethanol)-p-nitroaniline + N-(2-acetoxyethyl)-p-nitroaniline) Binary Mixtures

  • Salim Chelouche
  • Djalal Trache
  • Simão P. Pinho
  • Kamel Khimeche
  • Abderrahmane Mezroua
  • Mokhtar Benziane
Article
  • 25 Downloads

Abstract

Differential scanning calorimetry (DSC) is used to investigate the thermal properties of N-(2-ethanol)-p-nitroaniline + N-(2-acetoxyethyl)-p-nitroaniline, and their binary systems. The experimental results demonstrate that the studied binary system presents a simple eutectic behavior and the corresponding mole fraction (xeu) of N-(2-ethanol)-p-nitroaniline at the eutectic point is 0.5486, whereas the temperature (Teu) is found to be equal to 363.6 K. The quality of the solid–liquid equilibria (SLE) data has been checked by thermodynamic consistency tests, presenting good quality factor. The SLE data have been correlated by means of Wilson, NRTL, and UNIQUAC equations. The three models describe satisfactorily the phase diagram as the root-mean-square deviations for the equilibrium temperatures vary from 1.25 K to 2.07 K. Nevertheless, the Wilson model provides the best correlation results. The three equations have also been used to compute excess thermodynamic functions viz. excess Gibbs energy, enthalpy and entropy. The obtained results revealed a sensitive positive deviation to ideality thus demonstrating the nature of the interactions between the compounds forming the mixture. Microstructural studies have been carried out by FTIR, XRD and optical microscopy showing weak molecular interactions for the eutectic mixture.

Keywords

Eutectic mixture Excess thermodynamic properties Microstructure characterization Molecular interaction Propellant stability Semi-empirical models 

Supplementary material

10765_2018_2452_MOESM1_ESM.doc (205 kb)
Supplementary material 1 (DOC 205 kb)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.UER Procédés EnergétiquesEcole Militaire Polytechnique, EMPAlgiersAlgeria
  2. 2.Associate Laboratory LSRE-LCM, Departamento de Tecnologia Química e BiológicaInstituto Politécnico de BragançaBragançaPortugal
  3. 3.Mountain Research Center - CIMOPolytechnic Institute of BragançaBragançaPortugal
  4. 4.Ecole Supérieure du Matériel ESMAlgiersAlgeria

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