Peng-Robinson polymer

Tochigi, K, Fntaknchi, H., and Kojima, K., Prediction of vapor-liqnid eqnUibria in polymer solntions using the Peng-Robinson group contribution model. Fluid Phase Equilibria, 152, 209-217, 1998. 

The model assumes that the reaction mixture consists of a polymer phase swollen with ethylene and CO2, and an ethylene-C02 phase. The assumption that no polymer dissolves in the ethylene-C02 phase within the experimental conditions has previously been confirmed experimentally for a similar polymer [3]. The swollen polymer phase, i.e. the polymer-ethylene-C02 system, is modeled using the Statistical Associating Fluid Theory (SAFT) eos [6, 7], see Section 8.2.2. The supercritical phase, i.e. the ethylene-C02 system, is either modeled with the Lee-Kessler-Plocker (LKP) eos [30] or with the Peng-Robinson (PR) eos [31], because the use of the SAFT eos for the simulation of both phases results in physically inconsistent behavior [9]. The temperatures used in this work are just above the critical tern-... 

Redlich-Kwong equation of state and Soave modification Peng-Robinson equation of state Tait equation for polymer liquids Flory, Orwoll, and Vrij models Prigogine square-well cell model Sanchez-Lacombe lattice fluid theory... 

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