Statistical associating fluid theory-Dimer (SAFT-D) of chain
molecules for liquid phase is extended to model the solid phase of chains. The
model of freely jointed chains of tangent hard spheres requires the equation of
state of hard sphere monomers in solid phase and contact values of the radial
distribution function of the dimer molecules for solid phase. The theoretical
results for the equation of state and free energies for the chains up to 8 mers
are compared with simulation results. The agreement between theory and simulation
is improved over the recent results of Vega and MacDowell (Vega C and MacDowell
L G, J Chem Phys, 114(2001) 10411) employing thermodynamics perturbation
theory of first order (TPT-1).
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