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

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

2006-07-30

arxiv.org/abs/cond-mat/0607802v1

Physics

Condensed Matter

Soft Condensed Matter

18 pages, 13 figures

Scientific paper

10.1016/j.cplett.2007.07.052

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.

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