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A Slip Model for Linear Polymers Based on Adhesive Failure

  • S. G. Hatzikiriakos
Published/Copyright: May 27, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 8 Issue 2

Abstract

Eyring's theory of liquid viscosity was adapted to the special case of polymer molecules at a solid interface. The resulting model gives the slip velocity as a function of wall shear stress, temperature, pressure, work of adhesion and the molecular parameters of the polymer. The work of adhesion is related, on the one hand, to the critical stress for the onset of slip, and on the other, to the surface tension of the melt on the surface of interest. The predictions of the model are compared with previously published data for the slip of polyethylenes on steel and on steel treated with processing aids, and the agreement is very good. Unlike previous power-law slip models, the new model provides for a smooth transition from no-slip to slip flow at the critical stress.

* Mail address: Prof. S. G. Hatzikiriakos, Department of Chemical Engineering, The University of British Columbia, 2216 Main Mall, Vancouver, B.C., Canada V6T 1Z4.
Received: 1992-10-19
Accepted: 1992-11-3
Published Online: 2013-05-27
Published in Print: 1993-05-01

© 1993, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Internal Mixers
  4. Estimation of Quality of Mixing
  5. Screw Extrusion and Continuous Mixing
  6. An In-line Rheometer for Molten Plastics
  7. Melting of Plastics in Kneading Blocks
  8. Development of Phase Morphology of a Polyethylene-Polyamide 6-Blend in a Modular Co-rotating Twin Screw Extruder
  9. Microstructure Formation in Extruded and Drawn Polyblends of PC with a Thermotropic LCP
  10. Die Extrusion
  11. A Slip Model for Linear Polymers Based on Adhesive Failure
  12. Film
  13. Effect of Biaxial Stretching on Mechanical Properties and Surface Roughness of PMMA Films
  14. Molding
  15. Dynamics and Control of Surface and Mold Temperatures in Injection Molding
  16. A Study on Flexural Properties of Sandwich Injection Moldings
  17. Detailed Investigations of Structural Layering Phenomena in Injection Molded Thermotropic LCP
  18. Computer Controlled Rotational Molding of Liquid Silicone Polymer
https://doi.org/10.3139/217.930135

Articles in the same Issue

  1. Contents
  2. Contents
  3. Internal Mixers
  4. Estimation of Quality of Mixing
  5. Screw Extrusion and Continuous Mixing
  6. An In-line Rheometer for Molten Plastics
  7. Melting of Plastics in Kneading Blocks
  8. Development of Phase Morphology of a Polyethylene-Polyamide 6-Blend in a Modular Co-rotating Twin Screw Extruder
  9. Microstructure Formation in Extruded and Drawn Polyblends of PC with a Thermotropic LCP
  10. Die Extrusion
  11. A Slip Model for Linear Polymers Based on Adhesive Failure
  12. Film
  13. Effect of Biaxial Stretching on Mechanical Properties and Surface Roughness of PMMA Films
  14. Molding
  15. Dynamics and Control of Surface and Mold Temperatures in Injection Molding
  16. A Study on Flexural Properties of Sandwich Injection Moldings
  17. Detailed Investigations of Structural Layering Phenomena in Injection Molded Thermotropic LCP
  18. Computer Controlled Rotational Molding of Liquid Silicone Polymer
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