Orientation-dependent order-disorder transition of block copolymer lamellae in electric fields

Heiko G. Schoberth; Christian W. Pester; Markus Ruppel; Volker S. Urban; Alexander Böker

doi:10.1021/mz400013u

Orientation-dependent order-disorder transition of block copolymer lamellae in electric fields

Heiko G. Schoberth, Christian W. Pester, Markus Ruppel, Volker S. Urban, Alexander Böker

Chemical Engineering

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

17 Scopus citations

Abstract

Electric fields have been shown to stabilize the disordered phase of near-critical block copolymer solutions. Here, we use in situ synchrotron small-angle X-ray scattering to examine how the initial orientation of lamellar domains with respect to the external field (φ) affects the shift in the order-disorder transition temperature (T_ODT) of lyotropic solutions of poly(styrene-b-isoprene) in toluene. We find a downward shift of the transition temperature, which scales with lamellar orientation as ΔT _ODT ∼ cos² φ, in accordance with theory.

Original language	English (US)
Pages (from-to)	469-473
Number of pages	5
Journal	ACS Macro Letters
Volume	2
Issue number	6
DOIs	https://doi.org/10.1021/mz400013u
State	Published - Jun 18 2013

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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10.1021/mz400013u

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title = "Orientation-dependent order-disorder transition of block copolymer lamellae in electric fields",

abstract = "Electric fields have been shown to stabilize the disordered phase of near-critical block copolymer solutions. Here, we use in situ synchrotron small-angle X-ray scattering to examine how the initial orientation of lamellar domains with respect to the external field (φ) affects the shift in the order-disorder transition temperature (TODT) of lyotropic solutions of poly(styrene-b-isoprene) in toluene. We find a downward shift of the transition temperature, which scales with lamellar orientation as ΔT ODT ∼ cos2 φ, in accordance with theory.",

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T1 - Orientation-dependent order-disorder transition of block copolymer lamellae in electric fields

AU - Schoberth, Heiko G.

AU - Pester, Christian W.

AU - Ruppel, Markus

AU - Urban, Volker S.

AU - Böker, Alexander

PY - 2013/6/18

Y1 - 2013/6/18

N2 - Electric fields have been shown to stabilize the disordered phase of near-critical block copolymer solutions. Here, we use in situ synchrotron small-angle X-ray scattering to examine how the initial orientation of lamellar domains with respect to the external field (φ) affects the shift in the order-disorder transition temperature (TODT) of lyotropic solutions of poly(styrene-b-isoprene) in toluene. We find a downward shift of the transition temperature, which scales with lamellar orientation as ΔT ODT ∼ cos2 φ, in accordance with theory.

AB - Electric fields have been shown to stabilize the disordered phase of near-critical block copolymer solutions. Here, we use in situ synchrotron small-angle X-ray scattering to examine how the initial orientation of lamellar domains with respect to the external field (φ) affects the shift in the order-disorder transition temperature (TODT) of lyotropic solutions of poly(styrene-b-isoprene) in toluene. We find a downward shift of the transition temperature, which scales with lamellar orientation as ΔT ODT ∼ cos2 φ, in accordance with theory.

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JO - ACS Macro Letters

JF - ACS Macro Letters

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ER -

Orientation-dependent order-disorder transition of block copolymer lamellae in electric fields

Abstract

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