Nonperiodic Lamellar Phase in Ternary Diblock Copolymer/Homopolymer Blends
نویسندگان
چکیده
منابع مشابه
Phase Behavior of Ternary Homopolymer/Diblock Blends: Microphase Unbinding in the Symmetric System
We consider the phase behavior of a symmetric AB diblock, blended with corresponding A and B homopolymers, all of equal chain length. Evaluating the phase diagram in mean-field theory at all compositions of the ternary blend, we find no hexagonal and cubic phases. However, up to three distinct lamellar phases can coexist, one being symmetric and the other two being asymmetric. For strong incomp...
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We study the phase behavior of ternary blends of Aand B-homopolymers and symmetric, or slightly asymmetric, AB-diblock copolymer as obtained from self-consistent field theory. We choose one value of the segregation in the weak to intermediate regime and determine the effects of varying the relative degrees of polymerization of the components. The diagrams we obtain, which contain the classical ...
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A mesoscopic model of a diblock copolymer is used to study the stability of a uniform lamellar phase under a reciprocating shear flow. Approximate viscosity contrast between the microphases is allowed through a linear dependence of the (Newtonian) shear viscosity on monomer composition. We first show that viscosity contrast does not affect the composition of the base lamellar phase in an unboun...
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We present results of the study of the non-monotonous behavior of the Lifshitz line as a function of temperature in ternary homopolymer/diblock-copolymer mixtures. The non-monotonous behavior of the Lifshitz line is due to the wave vector dependence of fluctuational corrections, which we treat in the framework of the renormalization group method. Our results are in agreement with the experiment...
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ژورنال
عنوان ژورنال: Macromolecules
سال: 2002
ISSN: 0024-9297,1520-5835
DOI: 10.1021/ma025580u