Summary: Physica A 204 (1994) 1-16
Polymer adsorption at liquid Iair interfaces
under lateral pressure
Vered Aharonsona, David Andelmana, Anton Zilman",
Philip A. Pincusb and Elie Raphael"
"School of Physics and Astronomy, Tel Aviv University, Raymond and Beverly Sackler
Faculty of Exact Sciences, Ramat Aviv, Tel Aviv 69978, Israel
bMaterials and Physics Departments, University of California, Santa Barbara, CA 93106,
`Laboratoire de Physique de la MatiPre Condenste, URA no 792 du C.N.R.S.,
Collige de France, 75231 Paris Cedex 05, France
We present calculations of surface tension of absorbed polymer solutions at the liquid/air
interface. Lateral changes in the area per monomer on the surface are induced by changing
the surface pressure (lateral compression), while keeping the total surface excess fixed.
Lateral compression of the adsorbed layer immersed in a good solvent results in an increase in
the surface monomer concentration and surface pressure up to a critical area per monomer
value where the compressibility of the system vanishes. Our mean-field model is not