Spreading of viscous droplets on a non viscous liquid |
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| Authors: | F Brochard-Wyart G Debrégeas Prof P G de Gennes |
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| Institution: | (1) PSI Institute Curie, 11 rue Pierre et Marie Curie, 75 2431 Paris Cedex 05, France;(2) Laboratoire Matière Condensée, Collège de France, 75 231 Paris Cédex 05, France |
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| Abstract: | Some polymer melts (of high viscosity  ) can wet completely the surface of a non miscible, simple liquid. We discuss here the laws of spreading for a macroscopic droplet of this type, when the internal friction of the droplet dominates. We predict a droplet radius increasing liket
1/4 wheret is the spreading time, or equivalently a droplet curvature decreasing liket
–1. The droplet should be surrounded by a precursor film, which is not discussed in the present note. |
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| Keywords: | Wetting liquid interfaces polymer melts droplets plug flows |
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