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The Effect of Pressure on the Critical Temperature of Four-Component Microemulsioms

Published online by Cambridge University Press:  21 February 2011

Jacques Goyette ,
T. K. Bose ,
J. Thoen  and
J. R. Lalanne
Jacques Goyette
Affiliation:
Université du Quà Trois-Riviēres, C.P. 500, Trois-Riviēres, Québec, Canada, G9A 5H7
T. K. Bose
Affiliation:
Université du Quà Trois-Riviēres, C.P. 500, Trois-Riviēres, Québec, Canada, G9A 5H7
J. Thoen
Affiliation:
Katholieke Universiteit Leuven, 3030 Leuven, Belgium
J. R. Lalanne
Affiliation:
Centre de Recherche Paul Pascal, 33405 Talence, France
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Abstract

We present results for the pressure dependence of the critical temperature (dTc/dP) for several microemulsions of n-dodecane, water, n-pentanol and sodium dodecylsulfate with critical points along a criticial line ending at a critical end point (CEP). The variation of dTc/dP as a function of the water to surfactant ratio X shows a nonlinear behavior, with large changes near the CEP, and similar to the X dependence previously observed for the correlation length amplitude ξo. From the negative sign of dTc/dP we also conclude that a possible anomaly in the density must be opposite to the anomaly recently reported for the refractive index.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 177: Symposium V – Macromolecular Liquids , 1989 , 123
Copyright
Copyright © Materials Research Society 1990

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