Linear Elasticity of Cubic Phases in Block Copolymer Melts by Self-Consistent Field Theory

Linear Elasticity of Cubic Phases in Block Copolymer Melts by Self-Consistent Field Theory

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 th...

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Veröffentlicht in:Macromolecules 2003-05, Vol.36 (10), p.3764-3774
Hauptverfasser: Tyler, Christopher A, Morse, David C
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Applied sciences
Exact sciences and technology
Mechanical properties
Organic polymers
Physicochemistry of polymers
Properties and characterization
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Morse, David C
description 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.
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subjects Applied sciences
Exact sciences and technology
Mechanical properties
Organic polymers
Physicochemistry of polymers
Properties and characterization
title Linear Elasticity of Cubic Phases in Block Copolymer Melts by Self-Consistent Field Theory
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