Kinetic pathway of gyroid-to-cylinder transition in diblock copolymer melt under an electric field

Ly, Dung Q. and Honda, Takashi and Kawakatsu, Toshihiro and Zvelindovsky, Andrei (2007) Kinetic pathway of gyroid-to-cylinder transition in diblock copolymer melt under an electric field. Macromolecules, 40 (8). pp. 2928-2935. ISSN 0024-9297

Full content URL: http://pubs.acs.org/doi/abs/10.1021/ma061875m

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Kinetic pathway of gyroid-to-cylinder transition in diblock copolymer melt under an electric field

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Abstract

Gyroid-to-cylinder transition in a diblock copolymer melt under an electric field is studied by real-space dynamical self-consistent-field theory. Starting from an equilibrium gyroid structure, we apply an electric field along [111], [110], and [112] directions of the conventional unit cell of the gyroid structure. Under sufficiently high value of the electric field, an epitaxial transition to cylinders occurs. Contrary to the case of a similar transition under the shear flow, we observe 5-fold connections as intermediates in the transition. We found a critical behavior of the lifetime of the initial gyroid structure, which can be accounted for using the mean-field argument. Numerically obtained scattering function explains the unclarified intermediates experimentally observed in the thermal relaxation of a sheared gyroid. © 2007 American Chemical Society.

Keywords:Chemical relaxation, Electric fields, Melting, Molecular structure, Phase equilibria, Shear flow, Gyroid structures, Gyroid-to-cylinder transition, Self consistent field theory, Block copolymers
Subjects:F Physical Sciences > F162 Polymer Chemistry
Divisions:College of Science > School of Mathematics and Physics
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ID Code:14970
Deposited On:17 Sep 2014 11:53

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