A THEORY OF INTERFACE BETWEEN POLYMER AND POLYMER MIXTURE

We present a theoretical study of the non-symmetrical A/BC polymeric s ystem. The polymer blends consist of two phases, a pure polymeric phas e A on one side and a mixture of polymers B as a compatibilizer and C on the other. The adsorption of homopolymer B to the interface improve s the interfacial adhesion between two phases. By employing the functi onal integral techniques, we derive the mean-field equations and solve them numerically to obtain the interfacial properties including the c oncentration profiles in the limit of infinite molecular weight for th e polymers. The calculations of the interfacial properties are perform ed for typical values of the Flory chi parameters and the volume fract ion of polymer B in the asymptotic mixture phase. The interfacial adso rption of polymer B and the degrees of the specific interaction betwee n the polymers play an important role in modification of the interfaci al properties.