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- W1973290524 abstract "The physical meaning of the energetic parameter, χ12, that is characteristic of Flory theory is explored in connection to the random mixing hypothesis. It is known that, if such a hypothesis is valid, χ12 is independent of the concentration (x1). Here, deviations from the random mixing hypothesis are attributed to an excess of interactions between like molecules (if χ12(x1) > χ12(x1 = 0.5)) or of interactions between unlike molecules (if χ12(x1) < χ12(x1 = 0.5)). Binary mixtures of the type hydroxyether + dibutyl ether, or + 1-alkanol, or + 2-methoxyethanol have been investigated studying the χ12 variation with x1. Toward this end, we provide a new expression for χ12 which makes possible the exact determination of this magnitude at any composition if the corresponding molar excess enthalpy, , is known. Orientational effects are present in the studied solutions, although the model can represent the for hydroxyether + 1-alkanol or + 2-methoxyethanol, where the mentioned effects are weaker. The excess molar volumes, , are only described for the systems with two cellosolves, due to the existence in the remainder mixtures of structural effects. Results from the Kirkwood−Buff formalism, applied to 2-ethoxyethanol + dibutyl ether, or + 1-butanol, systems are in agreement with those obtained using Flory theory." @default.
- W1973290524 created "2016-06-24" @default.
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- W1973290524 date "2007-01-18" @default.
- W1973290524 modified "2023-09-27" @default.
- W1973290524 title "Thermodynamics of Mixtures Containing Alkoxyethanols. XXI. Application of the Flory Theory to the Study of Orientational Effects in Systems with Dibutyl Ether or 1-Butanol" @default.
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- W1973290524 doi "https://doi.org/10.1021/ie0609012" @default.
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