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

  • A. Michalczyk
  • W. Borchard

Abstract

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.

Keywords

Molar Mass Partial Molar Volume Vapour Pressure Difference Differential Technique Osmotic Pressure Difference 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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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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