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

Research output: Contribution to journalArticlepeer-review

14 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 (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.

Original languageEnglish (US)
Pages (from-to)469-473
Number of pages5
JournalACS Macro Letters
Volume2
Issue number6
DOIs
StatePublished - Jun 18 2013

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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