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Summary: EUROPHYSICS LETTERS
Europhys. Lett., 32 (7), pp. 567-572 (1995)
1 December 1995
Adsorption of Polymer Solutions on Surfactant Monolayers:
Global Phase Diagrams.
X. C~TELLIER(*)and D. ANDELMAN(**)
School of Physics and Astronomy
Raymond and Beverly Sackler Faculty of Exact Sciences
Tel Awiv University, Tel Awiv 69978, Ismel
(received 12 June 1995; accepted 17 October 1995)
PACS. 68.10-m - Fluid surfaces and fluid-fluid interfaces.
PACS. 05.70Fh - Phase transitions: general aspects.
PACS. 82.65Dp - Thermodynamics of surfaces and interfaces.
Abstract. - The phase diagram of insoluble surfactant monolayers at the &/water interface is
affected by the addition of polymer in the water subphase. The case of a condensation transition
is investigated within the framework of a mean-field theory. The interaction of the polymer with
the interface leads to an upward shift of the criticaltemperature and of the critical concentration
(if the monomers are more attracted by the surfactant molecules than by the bare interface). In
some situations, the phase diagram can display a triple point.
Many industrial products as well as biological systems involve the presence of both
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