Slip-controlled thin film dynamics
Authors
- Fetzer, Renate
- Rauscher, Markus
- Münch, Andreas
- Wagner, Barbara
ORCID: 0000-0001-8306-3645 - Jacobs, Karin
2010 Mathematics Subject Classification
- 76D08 76E17 74A55
Keywords
- Polymer melts, slip boundary effects, interfacial and free surface flows
DOI
Abstract
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 nm and 230 nm and various temperatures above the glass transition. We find slip lengths from 100 nm up to 1 $mu$m on OTS and between 300 nm and 10 $mu$m on DTS covered silicon wafers. The slip length decreases with temperature. The obtained values for the viscosity are consistent with independent measurements.
Appeared in
- Europhys. Lett., 75 (2006) pp. 638-644.
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