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Effects of Interfacial Conditions on Wall Slip and Sharkskin Melt Fracture of HDPE

  • S. G. Hatzikiriakos and J. M. Dealy
Published/Copyright: May 27, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 8 Issue 1

Abstract

Experiments were performed in capillary and slit rheometers to determine the effects of the presence of fluoropolymers at the polymer-wall interface on wall slip and extrudate distortion of a molten high density polyethylene. Two fluoropolymers were used to modify the interface. It was found that one of these decreased slip compared to the clean interface while the other increased slip. However, both were found to improve extrudate appearance, thus indicating that both adhesion promoters and slip promoters may improve extrudate appearance. The mechanism underlying this rather surprising conclusion is also discussed.

* Mail address: Prof. Dr. S. G. Hatzikiriakos, Department of Chemical Engineering, The University of British Columbia, 2216 Main Mall, Vancouver, B.C. Canada V6T 1Z4.
Received: 1992-4-3
Accepted: 1992-6-19
Published Online: 2013-05-27
Published in Print: 1993-03-01

© 1993, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Invited Paper
  4. The Challenges of Waste Toward the 21st Century
  5. Internal Mixers
  6. Simulation of 3-Dimensional Flow in Internal Mixers
  7. Die Extrusion
  8. Effect of Surface Coatings on Wall Slip of LLDPE
  9. Effects of Interfacial Conditions on Wall Slip and Sharkskin Melt Fracture of HDPE
  10. Reactive Processing
  11. Maleation of Polypropylene Melt in Model Reactors
  12. Film
  13. Modeling of Non-isothermal Film Blowing with Integral Constitutive Equations
  14. Non-isothermal Crystallization of a Polymer Film on Chilling Rolls
  15. Molding
  16. A Process to Produce Microcellular PVC
  17. Orientation Development of Mixed Anisotropic Particles in Compounds
https://doi.org/10.3139/217.930036

Articles in the same Issue

  1. Contents
  2. Contents
  3. Invited Paper
  4. The Challenges of Waste Toward the 21st Century
  5. Internal Mixers
  6. Simulation of 3-Dimensional Flow in Internal Mixers
  7. Die Extrusion
  8. Effect of Surface Coatings on Wall Slip of LLDPE
  9. Effects of Interfacial Conditions on Wall Slip and Sharkskin Melt Fracture of HDPE
  10. Reactive Processing
  11. Maleation of Polypropylene Melt in Model Reactors
  12. Film
  13. Modeling of Non-isothermal Film Blowing with Integral Constitutive Equations
  14. Non-isothermal Crystallization of a Polymer Film on Chilling Rolls
  15. Molding
  16. A Process to Produce Microcellular PVC
  17. Orientation Development of Mixed Anisotropic Particles in Compounds
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