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The Tricontinuous 3ths(5) Phase: A New Morphology in Copolymer Melts
Journal article   Peer reviewed

The Tricontinuous 3ths(5) Phase: A New Morphology in Copolymer Melts

M.G. Fischer, L. de Campo, J.J.K. Kirkensgaard, S.T. Hyde and G.E. Schröder-Turk
Macromolecules, Vol.47(21), pp.7424-7430
2014
DOI: https://doi.org/10.1021/ma5016352
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Abstract

Self-assembly remains the most efficient route to the formation of ordered nanostructures, including the double gyroid network phase in diblock copolymers based on two intergrown network domains. Here we use self-consistent field theory to show that a tricontinuous structure with monoclinic symmetry, called 3ths(5), based on the intergrowth of three distorted ths nets, is an equilibrium phase of triblock star-copolymer melts when an extended molecular core is introduced. The introduction of the core enhances the role of chain stretching by enforcing larger structural length scales, thus destabilizing the hexagonal columnar phase in favor of morphologies with less packing frustration. This study further demonstrates that the introduction of molecular cores is a general concept for tuning the relative importance of entropic and enthalpic free energy contributions, hence providing a tool to stabilize an extended repertoire of self-assembled nanostructured materials.

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Domestic collaboration
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Citation topics
2 Chemistry
2.53 Polymers & Macromolecules
2.53.884 Block Copolymers
Web Of Science research areas
Polymer Science
ESI research areas
Chemistry
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