Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2005-07-18
J. Chem. Phys., 123, 104904, 2005
Physics
Condensed Matter
Soft Condensed Matter
Scientific paper
10.1063/1.2009735
Using the phenol-terminated polycarbonate blend as an example, we demonstrate that the hydrodynamic boundary conditions for a flow of an adsorbing polymer melt are extremely sensitive to the structure of the epitaxial layer. Under shear, the adsorbed parts (chain ends) of the polymer melt move along the equipotential lines of the surface potential whereas the adsorbed additives serve as the surface defects. In response to the increase of the number of the adsorbed additives the surface layer becomes thinner and solidifies. This results in a gradual transition from the slip to the no-slip boundary condition for the melt flow, with a non-monotonic dependence of the slip length on the surface concentration of the adsorbed ends.
Andrienko Denis
Kremer Kurt
Site Luigi Delle
Zhou Xiangfa
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