Predicting the phase behavior of polymer systems with the GC-SAFT-VR approach

Yun Peng, Kimberly D. Goff, M. Carolina dos Ramos, Clare McCabe*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)


The recently developed heteronuclear group contribution SAFT-VR equation (GC-SAFT-VR) [Peng et al. Fluid Phase Equilib. 2009, 227 (2), 131-144] enables the predictive study of the thermodynamic properties of fluids and their mixtures by using a molecular-based model in which the molecules are described by heterosegmented chains in which each type of segment represents a functional group present in the molecule. Given the success of the GC-SAFT-VR approach in predicting the fluid phase equilibria of mixtures without fitting to any mixture data, and the known difficulties in determining equation-of-state parameters for polymers because of the lack of coexistance data, in this work, we extend the GC-SAFT-VR equation to study the phase equilibria of small molecules in polymer systems. The results demonstrate the ability of the GC-SAFTVR equation of state to predict the vapor-liquid and liquid-liquid equilibria of polymer solutions and accurately capture the effects of polymer molecular weight and molecular topology on phase behavior.

Original languageEnglish
Pages (from-to)1378-1394
Number of pages17
JournalIndustrial and Engineering Chemistry Research
Issue number3
Publication statusPublished - 3 Feb 2010

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering


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