The Influence of Substrate Properties on the Dewetting Dynamics of Viscoelastic Polymer Films

[EN] We studied the dewetting process of thin polystyrene (PS) films on silicon sub strates, coated with a thin, irreversibly adsorbed polydimethylsiloxane (PDMS) layer, by optical microscopy and atomic force microscopy. Besides demonstrating the exceptional potential of dewetting for a sensitive characterization of rheological properties of PS thin films, characterized by a stress-relaxation time, s1, we focused on the influence of the frictional behaviour (energy dissipation mechanism) at the interface between the PDMS-coated silicon wafer and the PS film on the dewetting process. Our results show that the initial stages of dewetting depend sensitively on the thickness and the way the PDMS layer was adsorbed. The maximum width of the dewetting rim at s1 increased with increasing PDMS layer thickness, which can be interpreted as an increase of the effective, velocity-dependent slippage length. Interestingly, s1 was found to be almost independent of the substrate properties. Our results demonstrate that dewetting is a really powerful approach for rheological and frictional studies of thin polymer films

Research center :

CIRMAP - Centre d'Innovation et de Recherche en Matériaux Polymères

Disciplines :

Chemistry
Physics

Author, co-author :

Hamieh, Mustapha

Al Akrass, Samer

Hamieh, T.

Damman, Pascal

Gabriele, Sylvain

Vilmin, Thomas

Raphaël, Elie

Reiter, Günter

Language :

English

Title :

The Influence of Substrate Properties on the Dewetting Dynamics of Viscoelastic Polymer Films

Publication date :

27 March 2007

Journal title :

Journal of Adhesion

ISSN :

0021-8464

Publisher :

Taylor & Francis, United Kingdom

Volume :

Issue :

Pages :

367-381

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://link.springer.com/content/pdf/10.1007/JHEP09(2014)094.pdf

Research unit :

S885 - Laboratoire Interfaces et Fluides complexes

Research institute :

R400 - Institut de Recherche en Science et Ingénierie des Matériaux
R150 - Institut de Recherche sur les Systèmes Complexes

Available on ORBi UMONS :

since 30 January 2012

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