Abstract
Abstract The application of the Generalized Flory-Dimer theory (GFD) to square well chain fluids is described. Molecules are modelled as chains of tangent hard spheres that interact via a site-site square well potential u(rij), where sites i and j are on different chains. The derivation of the GFD theory is reviewed; this is based on a combination of mean-field and geometric arguments. The resulting equation of state is in very good agreement with Monte Carlo computer simulation results for chains of length n = 16 and 32 at reduced temperatures T∗ = 2.0 and 3.0 and volume fractions η = 0.1 to 0.4.
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