Ising fluid model, polymer

From the large number of published equations of state for polymers, only a few are mentioned in this section. Most are based on the Prigogine cell model, others are semi-empirical or based on Ising fluids the smallest group is based on the cell-hole model. One of the reasons for the limited enthusiasm toward the latter models is that by nature they are algebraically more complex. 

The two-term crossover Landau model has been successfully applied to the description of the near-critical thermodynamic properties of various systems, that are physically very different the 3-dimensional lattice gas (Ising model) [25], one-component fluids near the vapor-liquid critical point [3, 20], binary liquid mixtures near the consolute point [20, 26], aqueous and nonaqueous ionic solutions [20, 27, 28], and polymer solutions [24]. 

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