2009/07/13 by O. Baeumchen, Oliver Baeumchen, R. Fetzer +6
Chemical Engineering · Engineering · Materials Science · Physics and Astronomy · #Block Copolymer Self-Assembly #FOS: Physical sciences #Fluid Dynamics and Thin Films #Rheology and Fluid Dynamics Studies #Soft Condensed Matter (cond-mat.soft) #cond-mat.soft
paper · pdf · doi:10.48550/arxiv.0907.2113
4 pages, 2 figures
arxiv created 2009/07/13 · openalex publication_date 2009/07/13 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Hydrodynamic slippage plays a crucial role in the flow dynamics of thin polymer films, as recently shown by the analysis of the profiles of liquid fronts. For long-chained polymer films it was reported that a deviation from a symmetric profile is a result of viscoelastic effects. In this Letter, however, evidence is given that merely a slip boundary condition at the solid/liquid interface can lead to an asymmetric profile. Dewetting experiments of entangled polymer melts on diverse substrates allow a direct comparison of rim morphologies. Variation of molecular weight Mw clearly reveals that slippage increases dramatically above a certain Mw and governs the shape of the rim. The results are in accordance with the theoretical description by de Gennes.