Acta Phys. -Chim. Sin. ›› 1998, Vol. 14 ›› Issue (08): 747-751.doi: 10.3866/PKU.WHXB19980815

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Vapour Pressure and Surface Tension of Aqueous Solution SDS-PEO

Hai Ming-Tan, Gao Jie, Han Bu-Xing, Yan Hai-Ke, Liu Yun, Han Qi-Yong   

  1. Institute of Chemistry,Academia Sinica,Beijing 100080;Department of Physicochemistry,University of Science and Technology,Beijing 100083|Department of Chemistry,Tsinghua University,Beijing 100084
  • Received:1997-10-09 Revised:1997-12-01 Published:1998-08-15
  • Contact: Han Bu-Xing


Vapor pressure and surface tension of the aqueous solution of sodium dodecyl sulfate(SDS)/polyethylene oxide(PEO) were measured at 298.15, 308.15 and 318.15K respectively, the concentration of PEO was 0.5%, and the concentration of SDS (mSDS ) was up to 80 mmol•kg-1 The activity coefficient of water at different temperatures was calculated. The effect of intermolecular interactions on the vapour pressure was discussed. From vapor pressure and surface tension data, the critical aggregate concentration (CAC) and polymer saturation point (PSP) were obtained.

Key words: Polyethylene oxide, Sodium dodecyl sulfate, Vapor pressure, Surface tension