Random copolymers as effective compatibilizing agents

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Abstract
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 γ 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 γ and therefore act as efficient compatibilizers. The calculations are useful in designing low-cost copolymer additives that significantly improve the properties of polymer blends.