Adsorption of a minority component in polymer blend interfaces

We analyze the adsorption per interfacial thickness of the minority component C, Gamma(C), in the interfaces between A and B rich phases in ternary polymer blends as a function of <(phi)over bar>(C) < <(phi)over bar>(A) = <(phi)over bar>(B), where <(phi)over bar>(I) is the mean composition of I, and the net interaction per thermal energy between I and J, chi(IJ). We find Gamma(C) solving numerically the nonlinear decomposition equations in the steady state. When C is nonselective, chi(AC)(=)chi(BC)(=)eta chi(AB), Gamma(C) increases as eta increases and it is linear with <(phi)over bar>(C) for <(phi)over bar>(C) << <(phi)over bar>(A) + <(phi)over bar>(B). For selective C, chi(AC)(=)eta chi(AB) and chi(BC)(=)epsilon chi(AB), in the case of minimum adsorption, eta=0, Gamma(C) decreases as epsilon increases and it vanishes when epsilon greater than or equal to 1.