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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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Article information


Submitted
10 May 2007
Accepted
30 Oct 2007
First published
21 Nov 2007

Soft Matter, 2008,4, 316-327
Article type
Paper

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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