Evaluation of equations of state applicable to polymers and complex systems

Jeong Won Kang, Ju Ho Lee, Ki Pung Yoo, Chul Soo Lee

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


Recent interests in EOS studies are extended to polymers and associating systems for which various investigators reported considerable successes. Among extensively studied EOS's are following three groups; a cubic EOS with an excess free energy-based mixing rules, hard sphere chain-based theories, and lattice fluid-based models. To evaluate the applicability of these EOSs, a typical EOS was chosen from each group and the results are compared for their accuracies in predicting bubble point pressures, vapor mole fractions, and activities based on the identical data sets of various nature. All three models were found generally less accurate in the critical region and for non-polar polymers in polar but non-associating solvents. Cases in which a model does better or worse were identified and discussed. Also discussed were parameter characteristics and the computation time.

Original languageEnglish
Pages (from-to)77-86
Number of pages10
JournalFluid Phase Equilibria
Publication statusPublished - 2002 Mar 30

Bibliographical note

Funding Information:
Authors are grateful to Professor J.P. O’Connell for helpful comments and interest. Support from Korea Ministry of Education in Brain Korea 21 program is appreciated. C.S. Lee also appreciates the partial support from Korea University.


  • Equation-of-state
  • Method of calculation
  • Vapor-liquid equilibria

ASJC Scopus subject areas

  • General Chemical Engineering
  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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