Epitaxial relationship for hexagonal-to-cubic phase transition in a book copolymer mixture

Mark F. Schulz; Frank S Bates; Kristoffer Almdal; Kell Mortensen

doi:10.1103/PhysRevLett.73.86

Epitaxial relationship for hexagonal-to-cubic phase transition in a book copolymer mixture

Mark F. Schulz, Frank S Bates, Kristoffer Almdal, Kell Mortensen

Chemical Engineering and Materials Science

Research output: Contribution to journal › Article › peer-review

138 Scopus citations

Abstract

Small-angle neutron scattering experiments have revealed an epitaxial relationship between the hexagonal cylinder phase, and a bicontinuous cubic phase with Ia3̄d space group symmetry, in a poly(styrene)-poly(2- vinylpyridine) diblock copolymer mixture. Proximity to the order-disorder transition and an inelastic low frequency rheological response suggest that the cubic phase is stabilized by fluctuations. These results identify block copolymers as model compounds for investigating the thermodynamics and dynamics of complex "soft" condensed matter.

Original language	English (US)
Pages (from-to)	86-89
Number of pages	4
Journal	Physical Review Letters
Volume	73
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevLett.73.86
State	Published - Jan 1 1994

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N2 - Small-angle neutron scattering experiments have revealed an epitaxial relationship between the hexagonal cylinder phase, and a bicontinuous cubic phase with Ia3̄d space group symmetry, in a poly(styrene)-poly(2- vinylpyridine) diblock copolymer mixture. Proximity to the order-disorder transition and an inelastic low frequency rheological response suggest that the cubic phase is stabilized by fluctuations. These results identify block copolymers as model compounds for investigating the thermodynamics and dynamics of complex "soft" condensed matter.

AB - Small-angle neutron scattering experiments have revealed an epitaxial relationship between the hexagonal cylinder phase, and a bicontinuous cubic phase with Ia3̄d space group symmetry, in a poly(styrene)-poly(2- vinylpyridine) diblock copolymer mixture. Proximity to the order-disorder transition and an inelastic low frequency rheological response suggest that the cubic phase is stabilized by fluctuations. These results identify block copolymers as model compounds for investigating the thermodynamics and dynamics of complex "soft" condensed matter.

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Epitaxial relationship for hexagonal-to-cubic phase transition in a book copolymer mixture

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