Convection-Induced Patterns in Phase-Separating Polymeric Fluids
- 19 October 1998
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 81 (16), 3427-3430
- https://doi.org/10.1103/physrevlett.81.3427
Abstract
The process of pattern formation and droplet coarsening has been studied for ternary polymeric fluids in which phase separation was induced by solvent evaporation. For a particular range of solvent evaporation rates and thicknesses of liquid layers, ordered hexagonal patterns were formed at the liquid film-air interface. We ascribe this effect to Bénard-Marangoni convection induced by solvent evaporation and estimate conditions generating periodic two-phase structures in polymeric films. Droplet coarsening rate featured a crossover from to coinciding with the onset of convection and was explained by convection-induced stabilization of droplets against coalescence.
Keywords
This publication has 16 references indexed in Scilit:
- Direct Imaging of Surface and Bulk Structures in Solvent Cast Polymer Blend FilmsLangmuir, 1997
- Physicochemical HydrodynamicsPublished by Wiley ,1994
- Self-organized honeycomb morphology of star-polymer polystyrene filmsNature, 1994
- Role of inertia in the late stage of the phase separation of a fluidPhysica A: Statistical Mechanics and its Applications, 1994
- Late-stage phase separation and sedimentation in a binary liquid mixturePhysical Review E, 1993
- Scaling Behaviour in the Demixing of a Binary-Liquid Mixture under GravityEurophysics Letters, 1992
- Turbulent growth of percolated droplets in phase-separating fluidsPhysical Review A, 1987
- Late-stage phase separation and hydrodynamic flow in a binary liquid mixturePhysical Review Letters, 1987
- Effect of inertia on droplet growth in a fluidPhysical Review A, 1985
- Late stages of spinodal decomposition in binary mixturesPhysical Review A, 1979