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Nanostructured Polymer Brushes With Reversibly Changing Properties

Published online by Cambridge University Press:  01 February 2011

Denys Usov ,
Manfred Stamm ,
Sergiy Minko ,
Christian Froeck ,
Andreas Scholl  and
Marcus Müller
Denys Usov
Affiliation:
Institut für Polymerforschung Dresden, Hohe Strasse 6, 01069 Dresden, Germany.
Manfred Stamm
Affiliation:
Institut für Polymerforschung Dresden, Hohe Strasse 6, 01069 Dresden, Germany.
Sergiy Minko
Affiliation:
Institut für Polymerforschung Dresden, Hohe Strasse 6, 01069 Dresden, Germany.
Christian Froeck
Affiliation:
Institut für Polymerforschung Dresden, Hohe Strasse 6, 01069 Dresden, Germany.
Andreas Scholl
Affiliation:
Advanced Light Source, Lawrence Berkeley National Laboratory, MS 6-2100, Berkeley, CA 94720, USA.
Marcus Müller
Affiliation:
Institut für Physik, Johannes Gutenberg Universität, D-55099 Mainz, Germany.
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Abstract

We investigated the interplay between different mechanisms of the lateral and vertical segregation in the synthesized via “grafting from” approach symmetric A/B (where A and B are poly(styrene-co-2,3,4,5,6-pentafluorostyrene) and poly(methylmethacrylate), respectively) polymer brushes upon exposure to different solvents. We used X-ray photoemission electron spectroscopy and microscopy (X-PEEM), AFM, water contact angle measurements, and oxygen plasma etching to study morphology of the brushes. The ripple morphology after toluene (nonselective solvent) revealed elongated lamellar-like domains of A and B polymers alternating across the surface. The dimple-A morphology consisting of round clusters of the polymer A was observed after acetone (selective solvent for B). The top layer was enriched with the polymer B showing that the brush underwent both the lateral and vertical phase segregation. A qualitative agreement with predictions of SCF theory was found.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 727: Symposium R – Nanostructured Interfaces , 2002 , R2.5
Copyright
Copyright © Materials Research Society 2002

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