| 초록 |
New equations of state for the freely jointed hard sphere chain fluids are developed. The equations of state are based on the thermodynamic perturbation theory. The new equations of state use the contact values of the radial distribution function (RDF) for monomer-dimer mixtures, which is derived from the multidensity Ornstein-Zernike theory. These RDFs are composed of a monomer reference term, the Carnahan-Starling or the Percus-Yevick expressions, and an additional bond contribution. We then extend these equations of state to real fluids. In order to calculate the phase equilibrium properties of non-associating chain fluids, a dispersion contribution is added to the repulsive hard-chain reference term. With the new equations of state of chain fluids supplemented with the dispersion term, the vapor pressures and the coexisting densities of several real fluids are calculated. |
