Equation of state of PEG/PEO in good solvent. Comparison between a one-parameter EOS and experiments

Research output: Contribution to journalArticle

Abstract

We investigate, through osmotic pressure measurements, the validity of the single-parameter equation of state (EOS) for solutions of polyethylene glycols in water, by Cohen et al.(1,2) We show that it is physically meaningful and that a reasonable good correspondence between the osmotic pressures for PEG35 in large range of concentrations is obtained. We also take the chain length dependence into account in our analysis, as suggested by Cohen et al. By recalculating the experimental pressures in the paper by Jonsson et al. 3 applying the new calibration curve, which is based on the experimental results obtained in this study and the EOS obtained by Cohen et al., there is almost a perfect correspondence between the simulations and the experiments. These results have implications for correctly probing macromolecular interactions in wide range of systems when applying the osmotic stress method. (C) 2015 Elsevier Ltd. All rights reserved.

Details

Authors
  • Joaquim Li
  • Martin Turesson
  • Caroline Anderberg Haglund
  • Bernard Cabane
  • Marie Skepö
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Polymer Chemistry

Keywords

  • PEG/PEO, Equation of state, Osmotic pressure, Scaling function
Original languageEnglish
Pages (from-to)205-213
JournalPolymer
Volume80
Publication statusPublished - 2015
Publication categoryResearch
Peer-reviewedYes