Regensburg 2013 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 44: Wetting, Micro- and Nanofluidics
CPP 44.5: Talk
Thursday, March 14, 2013, 16:15–16:30, H39
Influence of Slip on the Rayleigh-Plateau Rim Instability in Dewetting Polymer Films — •Sabrina Haefner1, Oliver Bäumchen1,2, Ludovic Marquant1, Matthias Lessel1, Ralf Blossey3, Andreas Münch4, Barbara Wagner5, and Karin Jacobs1 — 1Saarland University, Experimental Physics, D-66041 Saarbrücken, Germany — 2McMasters University, Dept. of Physics & Astronomy, Hamilton, ON, Canada — 3Interdisciplinary Research Institute (IRI), CNRS USR 3078, Villeneuve — 4Mathematical Institute, University of Oxford, Oxford OX1 3LB, UK — 5Technical University of Berlin, Institute for Mathematics, 10623 Berlin, Germany
A dewetting polymer film develops a characteristic fluid rim at its receding edge due to mass conservation. In the course of the dewetting process the rim becomes unstable via an instability of Rayleigh-Plateau type. An important difference exists between this classic instability of a liquid column and the rim instability in the thin film as the growth of the rim is continuously fueled by the receding film. We explain how the development and macroscopic morphology of the rim instability are controlled by the slip of the film on the substrate. A single thin-film model, valid for all slip lengths, captures quantitatively the characteristics of the evolution of the rim observed in our experiments.