Random copolymers at a selective interface: Many chains with excluded volume interactions |
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Authors: | G Peng J-U Sommer A Blumen |
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Institution: | Theoretische Polymerphysik, Universit?t Freiburg, Rheinstrasse 12, 79104 Freiburg, Germany, DE
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Abstract: | 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.
Received 4 March 1998 and Received in final form 22 September 1998 |
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Keywords: | 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 |
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