EFFECT OF MOLECULAR WEIGHT ON CAPILLARY ABSORPTION OF POLYMER DROPLETS

Gerald Pereira, Srikanth Dhondi
Ninth International Conference on CFD in the Minerals and Process Industries CSIRO   unpublished
We study capillary absorption of small polymer droplets into non-wettable capillaries using coarse-grained molecular dynamics simulations and simple analytic models. We study the effect of polymer chain length on the capillary absorption process. Our simulations reveal that for droplets of the same size (radius), the critical tube radius, below which there is no absorption, increases with the length of the polymer chains that constitute the droplets. We propose a model to explain this effect,
more » ... ich incorporates an entropic penalty for polymer confinement and find that the model agrees quantitatively with the simulations. We also find that the absorption dynamics is sensitive to the polymer chain length.
fatcat:sirwkoghyzc4lhrxbpmj3rhk2i