Isotropic Lifshitz behavior in block copolymer-homopolymer blends

F.S. Bates, W. Maurer, T.P. Lodge, M.F. Schulz, M.W. Matsen, K. Almdal, K. Mortensen

    Research output: Contribution to journalJournal articleResearch

    Abstract

    A series of mixtures composed of a symmetric A-B diblock copolymer and a symmetric blend of A and B homopolymers was investigated by small-angle neutron scattering. Mean-field theory predicts that a line of lamellar-disorder transitions with wave-vector instability q* > 0 will meet a line of critical points with q* = 0 in the three-component mixture at an isotropic Lifshitz point. Mean-field Lifshitz behavior (gamma = 1 and nu = 1/4) was observed in the disordered state at the anticipated composition to within 1 K of the phase transition.
    Original languageEnglish
    JournalPhysical Review Letters
    Volume75
    Issue number24
    Pages (from-to)4429-4432
    ISSN0031-9007
    DOIs
    Publication statusPublished - 1995

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