Mathematical modeling Huggins equation

The local free energy was presented with variety of mathematical models in different studies, such as the double-well model. A well Flory-Huggjns equation can be adapted for a polymer blend the ternary Flory-Huggins equation is as follows [33] ... 

The above-mentioned deficiencies of the Flory-Huggins theory can be alleviated, in part, by using the local-composition concept based on Guggenheim s quasichemical theory for the random mixing assumption and replacing lattice theory with an equation-of-state model (Prausnitz et al., 1986). More sophisticated models are available, such as the perturbed hard sphere chain (PHSC) and the statistical associating fluid theory (SAFT) (Caneba and Shi, 2002), but they are too mathematically sophisticated that they are impractical for subsequent computational efforts. 

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