Article ID Journal Published Year Pages File Type
204069 Fluid Phase Equilibria 2008 8 Pages PDF
Abstract

The Flory–Huggins model with two electrostatic terms (the Debye–Huckel and Pitzer–Debye–Huckel equations) and the Osmotic virial model were used to correlate the liquid–liquid equilibrium data of the aqueous solution of polyvinylpyrrolidone and diammonium hydrogen phosphate/ammonium dihydrogen phosphate buffer at various temperatures (298.15, 308.15 and 318.15 K) and pH 5 and 7. The obtained interaction parameters of models were used to calculate the activities of water, polymer and salt at three temperatures and both pH values. The deviations showed that these models can accurately correlate the activities of all species.

Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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