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Issue 24, 2016
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Effect of tethering on the surface dynamics of a thin polymer melt layer

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Abstract

The surface height fluctuations of a layer of low molecular weight (2.2k) untethered perdeuterated polystyrene (dPS) chains adjacent to a densely grafted polystyrene brush are slowed dramatically. Due to the interpenetration of the brush with the layer of “untethered chains” a hydrodynamic continuum theory can only describe the fluctuations when the effective thickness of the film is taken to be that which remains above the swollen brush. The portion of the film of initially untethered chains that interpenetrates with the brush becomes so viscous as to effectively play the role of a rigid substrate. Since these hybrid samples containing a covalently tethered layer at the bottom do not readily dewet, and are more robust than thin layers of untethered short chains on rigid substrates, they provide a route for tailoring polymer layer surface properties such as wetting, adhesion and friction.

Graphical abstract: Effect of tethering on the surface dynamics of a thin polymer melt layer

  • This article is part of the themed collection: Polymers
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Publication details

The article was received on 22 Jan 2016, accepted on 12 May 2016 and first published on 13 May 2016


Article type: Paper
DOI: 10.1039/C6SM00179C
Citation: Soft Matter, 2016,12, 5372-5377
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    Effect of tethering on the surface dynamics of a thin polymer melt layer

    G. Uğur, B. Akgun, Z. Jiang, S. Narayanan, S. Satija and M. D. Foster, Soft Matter, 2016, 12, 5372
    DOI: 10.1039/C6SM00179C

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