Kinetic pathways of gyroid-to-cylinder transitions in diblock copolymers under external fields: cell dynamics simulation

Pinna, Marco and Zvelindovsky, Andrei (2008) Kinetic pathways of gyroid-to-cylinder transitions in diblock copolymers under external fields: cell dynamics simulation. Soft Matter, 4 (2). pp. 316-327. ISSN 1744-683X

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Kinetic pathways of gyroid-to-cylinder transitions in diblock copolymers under external fields: cell dynamics simulation

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Abstract

Using cell dynamics simulation we investigate the cubic gyroid morphology of block copolymer melts under simple shear flow and electric field. The electric field should be stronger than a certain critical value to induce transition to a cylindrical phase. In the case of simple steady shear the gyroid-to-cylinder transition was observed even for a very weak shear. Quantitative analysis of pathways of gyroid-to-cylinder transition is performed by means of Minkowski functionals. We found that the kinetics of the gyroid-to-cylinder transition are different under electric field and shear flow. Moreover, the gyroid structure under different strengths of electric field shows different pathways. Different types of intermediates such as five-, four-fold connections and "winding" cylinders are found for different pathways. This journal is © The Royal Society of Chemistry.

Additional Information:First published as an Advance Article online: 21 November 2007
Keywords:Computer simulation, Electric field effects, Phase transitions, Shear flow, Shear stress, Strength of materials, Four-fold connections, Gyroid-to-cylinder transition, Minkowski functionals, Block copolymers
Subjects:F Physical Sciences > F162 Polymer Chemistry
Divisions:College of Science > School of Mathematics and Physics
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ID Code:14966
Deposited On:17 Sep 2014 11:35

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