The European Physical Journal E

, Volume 19, Issue 2, pp 185–193 | Cite as

Viscoelastic dewetting of a polymer film on a liquid substrate

Regular Articles

Abstract.

The Dewetting of thin polymer films (60–300 nm) on a non-wettable liquid substrate has been studied in the vicinity of their glass transition temperature. In our experiment, we observe a global contraction of the film while its thickness remains uniform. We show that, in this case, the strain corresponds to simple extension, and we verify that it is linear with the stress applied by the surface tension. This allows direct measurement of the stress/strain response as a function of time, and thus permits the measurement of an effective compliance of the thin films. It is, however, difficult to obtain a complete viscoelastic characterization, as the short time response is highly dependant on the physical age of the sample. Experimental results underline the effects of residual stress and friction when dewetting is analyzed on rigid substrates.

PACS.

68.60.-p Physical properties of thin films, nonelectronic 61.41.+e Polymers, elastomers, and plastics 68.55.-a Thin film structure and morphology 83.60.Bc Linear viscoelasticity 

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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2006

Authors and Affiliations

  1. 1.ESPCI, Laboratoire de Physico-Chimie des Polymères et des Milieux Dispersés, CNRS UMR 7615Paris Cedex 05France

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