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Article Dans Une Revue Thermochimica Acta Année : 2009

Volumetric properties of hexamethyleneimine and of its mixtures with water

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Christophe Coquelet
Alain Valtz
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Dominique Richon
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Résumé

Densities of pure hexamethyleneimine and of its aqueous Solutions have been measured at atmospheric pressure, using an Anton Paar digital vibrating tube densimeter, from 273.16 to 363.15 K and from 283.15 to 353.15 K, respectively. Acceptable representations of experimental data are found using a general correlation from Dauber et al. for pure hexamethyleneimine and using a general correlation from Bettin and Spieweck for pure water: thus indicating consistency of newly measured data. In this paper, we show the Redlich-Kister equation leads to incorrect data treatment particularly at low concentrations for systems presenting hydrophobic interactions. Thermal expansion coefficients (alpha*) for the pure hexamethyleneimine (HMI) and excess thermal expansion coefficient (alpha(E)) of the binary mixture: HMI + water at 283.15 and 298.15 K over the whole mole fraction range of water are presented and discussed in terms of the Structural changes in the mixtures.
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Dates et versions

hal-00574167 , version 1 (07-03-2011)

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Christophe Coquelet, Javeed A. Awan, Alain Valtz, Dominique Richon. Volumetric properties of hexamethyleneimine and of its mixtures with water. Thermochimica Acta, 2009, 484 (1-2), pp.57-64. ⟨10.1016/j.tca.2008.12.007⟩. ⟨hal-00574167⟩
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