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We examine weakly segregated blends of AB diblock copolymer and A homopolymer using self-consistent field theory. The addition of homopolymer to a diblock melt is found to stabilize new ordered morphologies: close-packed spheres, hexagonally perforated lamellae, and bicontinuous cubic ( QPn3̄m and QIa3̄d) phases. We find highly swollen phases that we associate with spherical, cylindrical, and lamellar micellar regions, and with disordered struts.
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M. W. Matsen (1995) studied this question.
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