Dewetting of a water film between a solid and a viscoelastic liquidReport as inadecuate




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Abstract : A water film squeezed between a hydrophobic solid S and a polymer melt P is metastable and dewets by nucleation and growth of a dry patch radius Rt at time t surrounded by a rim collecting the rejected water. Taking into account the viscoelastic behaviour of P, we are led to predict : a a pure elastic regime if R < Rc, where the melt behaves like a rubber, with Rt ∼t3-4 ; b a viscous regime, at longer times, where the rim is extended by its friction against P, and moves at constant velocity.





Author: F. Brochard-Wyart

Source: https://hal.archives-ouvertes.fr/



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