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Thermodynamics of mixing of propylene oxide oligomers with different end groups and of statistical and block cooligomers of ethylene oxide and propylene oxide in tetrachloromethane

✍ Scribed by Erwin Killmann; Frank Cordt; Friedrich Möller; Helmut Zellner

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
704 KB
Volume
196
Category
Article
ISSN
1022-1352

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✦ Synopsis

Mixing enthalpies and Gibbs energies of liquid propylene oxide oligomers with hydroxyl and methoxy end groups and of block and statistical cooligomers of ethylene oxide and propylene oxide in tetrachloromethane are obtained by microcalorimetry and vapour pressure measurements. The thermodynamic excess quantities AH, AGE and ASE of mixing are influenced by induced dipol interactions of the ether segments with CCI, and by the hydrogen bond interactions of the OH end groups. An expanded theoretical treatment using the Huggins approach of quasichemical equilibrium between the contacting segment surfaces is successfully applied on the experimental results.

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