Effect of temperature on the phase equilibrium of aqueous two‐phase polymer systems

H. Hartounian, E. Floeter, E. W. Kaler, S. I. Sandler

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

We report experimental data showing the effect of temperature on polymer partitioning in the dextran (DEX500)‐polyethylene glycol (PEG8000)‐water system. Increasing temperature increases the concentration of PEG in the top phase and decreases the concentration of DEX in the bottom phase. A solution thermodynamic model based on local compositions with temperature‐dependent parameters correlates the experimental data well, and an efficient Gibbs‐free energy minimization algorithm for phase equilibrium calculations is described. The partial molar enthalpies and entropies of each of the solutes, calculated with the model, are negative and decrease in magnitude as temperature increases.

Original languageEnglish (US)
Pages (from-to)1976-1984
Number of pages9
JournalAIChE Journal
Volume39
Issue number12
DOIs
StatePublished - Dec 1993

Fingerprint Dive into the research topics of 'Effect of temperature on the phase equilibrium of aqueous two‐phase polymer systems'. Together they form a unique fingerprint.

Cite this