Phase coexistence in the hard-sphere Yukawa chain fluid with chain length polydispersity: High temperature approximation

High temperature approximation (HTA) is used to describe the phase behavior of polydisperse multi-Yukawa hard-sphere chain fluid mixtures with chain length polydispersity. It is demonstrated that in the frames of the HTA the model belongs to the class of ``truncatable free energy models'',...

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Bibliographic Details
Published inarXiv.org
Main Authors Hlushak, S P, Kalyuzhnyi, Yu V
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 30.07.2006
Subjects
Approximation
Chains
Chemical potential
Distribution functions
Free energy
High temperature
Mathematical analysis
Organic chemistry
Phase diagrams
Polydispersity
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Summary:High temperature approximation (HTA) is used to describe the phase behavior of polydisperse multi-Yukawa hard-sphere chain fluid mixtures with chain length polydispersity. It is demonstrated that in the frames of the HTA the model belongs to the class of ``truncatable free energy models'', i.e. the models with thermodynamical properties (Helmholtz free energy, chemical potential and pressure) defined by the finite number of generalized moments. Using this property we were able to calculate the complete phase diagram (i.e., cloud and shadow curves as well as binodals) and chain length distribution functions of the coexisting phases.
ISSN:2331-8422
DOI:10.48550/arxiv.0607802