Random copolymers at a selective interface: Many chains with excluded volume interactions
Theoretische Polymerphysik, Universität Freiburg, Rheinstrasse 12,
79104 Freiburg, Germany
2 Department of Physics and Astronomy, Bowling Green State University, Bowling Green, OH 43403, USA
Revised: 22 September 1998
Published online: 15 March 1999
We investigate numerically, using the bond-fluctuation model, the adsorption of many random AB-copolymers with excluded volume interactions at the interface between two solvents. We find two regimes, controlled by the total number of polymers. In the first (dilute) regime, the copolymers near the interface extend parallel to it, while in the second regime they extend perpendicular to it. The density at the interface and the density in the bulk depend differently on the total number of copolymers: In the first regime the density at the interface increases more rapidly than in the bulk, whereas the opposite is true in the second regime.
PACS: 61.25.Hq – Macromolecular and polymer solutions; polymer melts; swelling / 83.70.Hq – Heterogeneous liquids: suspensions, dispersions, emulsions, pastes, slurries, foams, block copolymers, etc.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999