Determination of the Thermodynamic Properties of the System Polyethylene Oxide/Water

  • A. Michalczyk
  • W. Borchard


The thermodynamic properties of the system polyethylene oxide (PEO) / water were investigated with osmotic measurements in a temperature interval ranging from 283 – 323 K. To carry out these experiments in a large concentration range a differential technique has been used by measuring the osmotic pressure difference between two solutions of different concentrations. Measurements of osmotic vapour pressure with a low molecular polymer and those of membrane osmosis with a high molecular polymer indicate that the polymer associates in solution as a function of temperature. The Flory-Huggins-parameter is independent of concentration and dependent on temperature in the investigated temperature and concentration range.


Molar Mass Partial Molar Volume Vapour Pressure Difference Differential Technique Osmotic Pressure Difference 
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Copyright information

© Elsevier Science Publishers Ltd 1989

Authors and Affiliations

  • A. Michalczyk
    • 1
  • W. Borchard
    • 1
  1. 1.Angewandte Physikalische ChemieUniversität-GH-DuisburgGermany

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