Interface morphologies in liquid/liquid dewetting

The dynamics and morphology of a liquid polystyrene (PS) film on the scale of a hundred nanometer dewetting from a liquid polymethylmethacrylate (PMMA) film is investigated experimentally and theoretically. The polymers considered here are both below their entanglement lengths and have negligible elastic properties. A theoretical model based on viscous Newtonian flow for both polymers is set up from which a system of coupled lubrication equations is derived and solved numerically. A direct comparison of the numerical solution with the experimental findings for the characteristic signatures of the cross-sections of liquid/air and liquid/liquid phase boundaries of the dewetting rims as well as the dewetting rates is performed and discussed for various viscosity ratios of the PS and PMMA layers.

Keywords

Thin films, polymer-polymer dewetting, lubrication theory, numerical solution

URI

https://doi.org/10.34657/2541
https://oa.tib.eu/renate/handle/123456789/2551

Citation

Kostourou, K., Peschka, D., Münch, A., Wagner, B., Herminghaus, S., & Seemann, R. (2010). Interface morphologies in liquid/liquid dewetting (Vol. 1560). Berlin : Weierstraß-Institut für Angewandte Analysis und Stochastik.

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Mathematik

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