Monte Carlo simulations of random copolymers at a selective interface

We investigate numerically using the bond-fluctuation model the adsorption of a random AB copolymer at the interface between two solvents. From our results we infer several scaling relations: the radius of gyration of the copolymer in the direction perpendicular to the interface (Rgz) scales with {χ}, the interfacial selectivity strength, as Rgz=N^νf({}N{χ}) where {ν} is the usual Flory exponent and N is the copolymer's length; furthermore the monomer density at the interface scales as χ^2ν for small {χ}. We also determine numerically the monomer densities in the two solvents and discuss their dependence on the distance from the interface. {} 1996 The American Physical Society.