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Article Dans Une Revue Journal of Non-Newtonian Fluid Mechanics Année : 2012

Effect of die surface on the onset of stick-slip transition in the flow of molten linear polymers

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Résumé

We develop a relationship to describe the effect of surface roughness on the stick-slip transition for linear polymers. Using the Brochard-de Gennes slip model and including molecular chain dynamics at the wall, we develop an expression for the critical shear stress for the onset of wall slip as a function of the wettability of the polymer on the die surface or, more precisely, as a function of the apparent contact angle between polymer and die surface. The surface roughness can be also accounted for using additional parameters.
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Dates et versions

hal-00647830 , version 1 (02-12-2011)

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Ahmed Allal, Bruno Vergnes. Effect of die surface on the onset of stick-slip transition in the flow of molten linear polymers. Journal of Non-Newtonian Fluid Mechanics, 2012, Volumes 167-168, pp.46-49. ⟨10.1016/j.jnnfm.2011.10.002⟩. ⟨hal-00647830⟩
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