Phase behavior of gradient copolymers

Physics – Condensed Matter – Statistical Mechanics

Scientific paper

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Order-Disorder Transformations, Statistical Mechanics Of Model Systems, Macromolecular And Polymer Solutions, Polymer Melts, Swelling, Solid-Liquid Transitions

Scientific paper

Phase properties of gradient AB copolymer melts which consist of chains with the specified chemical distribution of A and B monomers have been studied within the Landau-Ginzburg model. All the melts with the linear distribution of the monomers exhibit only a direct continuous phase transition from disordered to the lamellar phase. The hexagonal, body-centered-cubic, double-gyroid(G) and lamellar ordered structures have been found in the melts with the monotonic but nonlinear distribution of the monomers. The G structure has been also found in the gradient copolymer melts with the distribution function of monomers similar to the A-B-A triblock copolymers. .

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