8-10 November 2021
University of Freiburg
Europe/Berlin timezone

Dewetting as a probe of properties of polymers at interfaces and in thin films

10 Nov 2021, 09:00
45m
Aula, Kollegiengebäude I (University of Freiburg)

Aula, Kollegiengebäude I

University of Freiburg

Platz der Universität 3, 79098 Freiburg
Keynote

Speaker

Günter Reiter (Institute of Physics, University of Freiburg)

Description

The process of dewetting allows to probe the dynamic behavior of polymers within thin films as the response to an applied force, generated directly and intrinsically by interfacial forces and forces acting within the film itself. In addition, taking advantage of the fact that on a single sample the process of dewetting is not initiated everywhere at the same time, one can follow the evolution of a sequence of temporally delayed dewetting processes. Thus, one can examine how nonequilibrium properties of thin polymer films evolve in time. Such sequential dewetting experiments provide a means for determining the time required for equilibration and how viscoelastic properties of the polymer film evolve in time. As one example, the relaxation of residual stresses in thin polymer films can be quantified through the measurement of characteristic parameters of dewetting.

Primary author

Günter Reiter (Institute of Physics, University of Freiburg)

Presentation Materials

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