Interface morphologies in liquid/liquid dewetting
- Kostourou, Konstantina
- Peschka, Dirk
- Münch, Andreas
- Wagner, Barbara
- Herminghaus, Stephan
- Seemann, Ralf
2010 Mathematics Subject Classification
- 76A20 35R35 76D08 76-05
- thin films, polymer-polymer dewetting, lubrication theory, numerical solution
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.
- Chemical Engineering and Processing, 50 (2011) pp. 531--536.