Linear elasticity of cubic phases in block copolymer melts by self-consistent field theory

Christopher A. Tyler, David C. Morse

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

We examine the linear elasticity of the bcc and gyroid phases of block copolymer melts with self-consistent field theory (SCFT). Linear elastic moduli for single crystals are predicted by calculating the free energies for slightly deformed crystal structures. Predicted Voight and Reuss bounds for the shear modulus of a polycrystalline material are quantitatively compared to the cubic plateau moduli found in linear viscoelastic measurements of both phases with good agreement. We also consider a model of pairwise additive interactions between "micelles" in the bcc and fcc phases and find that it predicts ratios of elastic constants consistent with those predicted by SCFT for the bcc phase, but not for the fcc phase.

Original languageEnglish (US)
Pages (from-to)3764-3774
Number of pages11
JournalMacromolecules
Volume36
Issue number10
DOIs
StatePublished - May 20 2003

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