Deformation and relaxation of grafted polymer layers at elevated temperatures

Journal Reference

Colloid and Polymer Science , 2015, Volume 293, Issue 6, pp 1593-1605.

Konrad Schneider1 , David Nitsche1,2 , Manfred Stamm1,3

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  1. Leibniz-Institut für Polymerforschung Dresden e.V, Hohe Strasse 6, 01069, Dresden, Germany
  2. Fakultät Mathematik und Naturwissenschaften, Fachrichtung Chemie und Lebensmittelchemie, Technische Universität Dresden, Dresden, Germany
  3. Fakultät Mathematik und Naturwissenschaften, Fachrichtung Physikalische Chemie Polymerer Materialien, Technische Universität Dresden, Dresden, Germany
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Abstract

The mechanical deformation and relaxation behaviour of thin-grafted polymer layers is investigated by a scanning force microscope (SFM) in contact mode. The layers were considerably plastically deformed at different temperatures. By scratching across the surface, a ripple structure is created. The temperature- and time-dependent relaxation of the ripple structure is followed directly by SFM and discussed in comparison to classical viscoelastic relaxation behaviour and time-temperature superposition of bulk material. In contrast to classical viscoelastic behaviour, here, the strong plastic deformation of the grafted layers accelerates the relaxation behaviour.

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