Volume 75, Number 4, August 2006
|Page(s)||638 - 644|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||19 July 2006|
Slip-controlled thin-film dynamics
Department of Experimental Physics, Saarland University 66123 Saarbrücken, Germany
2 Max-Planck-Institut für Metallforschung - Heisenbergstr. 3 70569 Stuttgart, Germany
3 ITAP, University of Stuttgart - Pfaffenwaldring 57, 70569 Stuttgart, Germany
4 Institute of Mathematics, Humboldt University Berlin - 10099 Berlin, Germany
5 Weierstrass Institute for Applied Analysis and Stochastics Mohrenstr. 39, 10117 Berlin, Germany
Accepted: 4 July 2006
In this study, we present a novel method to assess the slip length and the viscosity of thin films of highly viscous Newtonian liquids. We quantitatively analyse dewetting fronts of low-molecular-weight polystyrene melts on octadecyl- (OTS) and dodecyltrichlorosilane (DTS) polymer brushes. Using a thin-film (lubrication) model derived in the limit of large slip lengths, we can extract slip length and viscosity. We study polymer films with thicknesses between 50 and 230 and various temperatures above the glass transition. We find slip lengths from 100 up to 1 on OTS- and between 300 and 10 on DTS-covered silicon wafers. The slip length decreases with temperature. The obtained values for the viscosity are consistent with independent measurements.
PACS: 83.80.Sg – Polymer melts / 47.15.gm – Thin film flows / 83.50.Lh – Slip boundary effects (interfacial and free surface flows)
© EDP Sciences, 2006
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.