Salt Complexation in Cleavable Polystyrene-b-poly (ethylene oxide) Thin Films

ORAL

Abstract

Salt complexation in a newly developed cylinder forming Polystyrene-b-polyethylene (PS-b-PEO) with a cleavable linker between two blocks was investigated. Highly oriented, close-packed arrays of nanoscopic cylindrical domains with a high degree of long-range lateral order was obtained in the copolymer thin films during solvent annealing and solvent evaporation at relatively low humidity or extremely dry condition. The orientation and lateral ordering of cylindrical microdomains were found to strongly depend on salt concentration. With the addition of certain amount of salt, we observed that the copolymer microdomains remained ordered at high degree of swelling by in-situ grazing incidence small angle X-ray scattering. With the ability to rapidly cleave the PEO block through the designed cleavable linker under mild condition, highly ordered porous structures are readily generated.

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Authors

  • Ling Yang

    Dept. of Polymer Science and Engineering, University of Massachusetts at Amherst

  • Mingfu Zhang

    Dept. of Polymer Science and Engineering, University of Massachusetts at Amherst

  • Serkan Yurt

    Dept. of Chemistry, University of Massachusetts at Amherst

  • Matthew Misner

    Dept. of Polymer Science and Engineering, University of Massachusetts at Amherst

  • E. Bryan Coughlin

    Dept. of Polymer Science and Engineering, University of Massachusetts at Amherst

  • D. Venkataraman

    Dept. of Chemistry, University of Massachusetts at Amherst

  • Thomas Russell

    University of Massachusetts, Dept. of Polymer Science and Engineering, University of Massachusetts at Amherst, Polymer Science and Engineering Department, University of Massachusetts Amherst, Department of Polymer Science \& Engineering, University of Massachusetts, Amherst, MA 01003, USA, University of Massachusetts, Amherst, Dept. of Polymer Science and Engineering, Univ. of Massachusetts, Amherst, Dept. of Polymer Science and Engineering, Univ. of Massachusetts Amherst, Polymer Science and Engineering, Univ. of Massachusetts Amherst, Department of Polymer Science and Engineering,University of Massachusetts-Amherst

  • Benjamin Ocko

    Condensed Matter Physics and Materials Science, Brookhaven National Laboratory

  • Xuefa Li

    Advanced Photon Source, Argonne National Laboratory, Argonne National Lab, Advanced Photon Source, Argonne National Laboratory