Random copolymers as effective compatibilizing agents

We introduce a mean field model that allows us to determine the interfacial behavior of AB random copolymers. Through this model, we calculate the reduction in interfacial tension that occurs when the random copolymers localize at the interface between immiscible homopolymers A and B. We also isolate the conditions under which the random copolymers are most efficient at reducing and therefore act as efficient compatibilizers. The calculations are useful in designing low-cost copolymer additives that significantly improve the properties of polymer blends.