Liquid Front Profiles Affected by Entanglement-induced Slippage - Condensed Matter > Soft Condensed MatterReport as inadecuate




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Abstract: Hydrodynamic slippage plays a crucial role in the flow dynamics of thinpolymer films, as recently shown by the analysis of the profiles of liquidfronts. For long-chained polymer films it was reported that a deviation from asymmetric profile is a result of viscoelastic effects. In this Letter, however,evidence is given that merely a slip boundary condition at the solid-liquidinterface can lead to an asymmetric profile. Dewetting experiments of entangledpolymer melts on diverse substrates allow a direct comparison of rimmorphologies. Variation of molecular weight Mw clearly reveals that slippageincreases dramatically above a certain Mw and governs the shape of the rim. Theresults are in accordance with the theoretical description by de Gennes.



Author: O. Baeumchen, R. Fetzer, K. Jacobs

Source: https://arxiv.org/







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