The slip velocity of an industrial grade high molecular weight high-density polyethylene (HDPE) is studied in steady and dynamic shear experiments using a stress/strain controlled rotational rheometer equipped with a parallel partitioned plate geometry. Moreover, fluoroalkyl silane-based coating is used to understand the effect of surface energy on slip in steady and dynamic conditions. The multimode integral Kaye-Bernstein-Kearsley-Zapas constitutive model is applied to predict the transient shear response of the HDPE melt obtained from rotational rheometer. It is found that a dynamic slip model with a slip relaxation time is needed to adequately predict the experimental data at large shear deformations. Comparison of the results before and after coating shows that the slip velocity is largely affected by surface energy. Decreasing surface energy by coating increases slip velocity and decreases the slip relaxation time.
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March 2018
Letter|
February 09 2018
Dynamic slip of polydisperse linear polymers using partitioned plate
Special Collection:
Papers from the 8th Meeting of the Hellenic Society of Rheology
Marzieh Ebrahimi;
Marzieh Ebrahimi
Department of Chemical and Biological Engineering, The University of British Columbia
, Vancouver, British Columbia V6T 1Z3, Canada
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Vinod Kumar Konaganti;
Vinod Kumar Konaganti
Department of Chemical and Biological Engineering, The University of British Columbia
, Vancouver, British Columbia V6T 1Z3, Canada
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Savvas G. Hatzikiriakos
Savvas G. Hatzikiriakos
a)
Department of Chemical and Biological Engineering, The University of British Columbia
, Vancouver, British Columbia V6T 1Z3, Canada
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a)
Author to whom correspondence should be addressed: savvas.hatzi@ubc.ca
Physics of Fluids 30, 030601 (2018)
Article history
Received:
June 13 2017
Accepted:
July 28 2017
Citation
Marzieh Ebrahimi, Vinod Kumar Konaganti, Savvas G. Hatzikiriakos; Dynamic slip of polydisperse linear polymers using partitioned plate. Physics of Fluids 1 March 2018; 30 (3): 030601. https://doi.org/10.1063/1.4989934
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