Abstract : In this paper, we investigate the relationships between stick-slip defect and molecular slip at the wall for linear polymers. By considering Brochard-de Gennes slip model and molecular chain dynamics at the wall, we propose an expression for the critical shear stress at the onset of stick-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.
https://hal-mines-paristech.archives-ouvertes.fr/hal-00675599 Contributor : Magalie PrudonConnect in order to contact the contributor Submitted on : Thursday, March 1, 2012 - 3:33:17 PM Last modification on : Monday, February 14, 2022 - 12:44:02 PM Long-term archiving on: : Thursday, June 14, 2012 - 5:06:04 PM
Ahmed Allal, Bruno Vergnes, John M. Dealy. Effect of die surface on the onset of stick-slip flow in polymer processing. 27th World Congress of the Polymer Processing Society, May 2011, Marrakech, Morocco. 3 p. ⟨hal-00675599⟩