Investigation of the slip transition at the melt polymer interface
Authors:
- L LegerLLL Leger
- 1 July 1998
- journal article
- Published by IOP Publishing in Europhysics Letters
- Vol. 43 (1) , 83-88
Abstract
We present a detailed experimental investigation of the eect of molecular param- eters on the onset of strong slip at the wall for polydimethylsiloxane melts flowing against silica surfaces on which a weak density of polymer chains are anchored by adsorption. The observed variation of the critical velocity for the onset of strong slip V/ N 1:09P 3:2 ,w ith Nand P the polymerisation indices of surface and bulk chains, respectively, and the wide range of the non-linear friction regime above V strongly support the description of the dynamic de-coupling between the surface and bulk chains in terms of progressive disentanglement.Keywords
This publication has 12 references indexed in Scilit:
- Wall slip in polymer meltsJournal of Physics: Condensed Matter, 1997
- Influence of grafting density on wall slip of a polymer melt on a polymer brushEurophysics Letters, 1997
- Slippage of Polymer Melts on Grafted SurfacesMacromolecules, 1996
- Drag on a Tethered Chain Moving in a Polymer MeltJournal de Physique II, 1995
- Slip transition of a polymer melt under shear stressPhysical Review Letters, 1993
- Shear-dependent slippage at a polymer/solid interfaceLangmuir, 1992
- Irreversible Adsorption of a Concentrated Polymer SolutionEurophysics Letters, 1992
- Silanation of silica surfaces. A new method of constructing pure or mixed monolayersLangmuir, 1991
- Ultrathin films in wetting evidenced by x-ray reflectivityPhysical Review A, 1990
- Molecular layering in the spreading of wetting liquid dropsNature, 1989