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Issue 2, 2008
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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.

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

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Publication details

The article was received on 10 May 2007, accepted on 30 Oct 2007 and first published on 21 Nov 2007


Article type: Paper
DOI: 10.1039/B706815H
Citation: Soft Matter, 2008,4, 316-327
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    Kinetic pathways of gyroid-to-cylinder transitions in diblock copolymers under external fields: cell dynamics simulation

    M. Pinna and A. V. Zvelindovsky, Soft Matter, 2008, 4, 316
    DOI: 10.1039/B706815H

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