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A Comparison of the Axisymmetric and Planar Elongational Viscosities of PE-LD

  • P. Beaupre and M. Gupta
Published/Copyright: June 3, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 17 Issue 4

Abstract

The elongational viscosities of a low density polyethylene in axisymmetric and planar flows are compared. The experimental data on entrance pressure loss is matched with the corresponding finite element predictions to estimate the parameters in the elongational viscosity model proposed by Sarkar and Gupta. The entrance losses in the capillary and slit rheometers are used to predict the elongational viscosities for axisymmetric and planar flows respectively. The power-law region of the axisymmetric as well as planar elongational viscosity is found to follow the time-temperature superposition principle. The vortices encountered in the flow near the abrupt contraction for the planar and axisymmetric cases are compared. The vortex near the abrupt contraction is found to reduce in size as the flow rate is increased for planar as well as axisymmetric entrance flow.

* Mail address: M. Gupta, Mechanical Engineering-Engineering Mechanics Department, Michigan Technological University, 815 R. L. Smith ME-EM Bldg., 1400 Townsend Dr., Houghton, MI 49931-1295 USA
Received: 2002-5-21
Accepted: 2002-10-29
Published Online: 2013-06-03
Published in Print: 2002-12-01

© 2002, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Editorial
  2. Structure Development in Polyolefin Processing
  3. Screw Extrusion
  4. A New Style Single Screw Extruder with Improved Plastification and Output Power
  5. Visualisation and Analysis of the Flow along the Kneading Block of a Twin-screw Extruder
  6. Resonant and Invariant Advection in Single-Screw Extrusion
  7. Compounding
  8. PP-based Model Compounds as Tools for the Development of High-impact-ethylene-propylene Copolymers
  9. Die Extrusion
  10. Modelling of the Flow in the Distribution Plate of a Spin Pack
  11. Free-radical Reactions and Thermal Effects in PE during Pipe Extrusion
  12. Calendering
  13. Simultaneous Calculation of Roll Deformation and Polymer Flow in the Calendering Process
  14. Fiber and Film
  15. Investigation of Bubble Instabilities in Film Blowing Process
  16. Injection Molding
  17. Flow Visualization of Filling Process during Micro-Injection Molding
  18. Thermoforming
  19. The Role of Tool/Sheet Contact in Plug-assisted Thermoforming
  20. A Comparison of the Axisymmetric and Planar Elongational Viscosities of PE-LD
  21. Pultrusion
  22. Polymer Melt Impregnation of Glass Roving
  23. Reaction Injection Molding
  24. Operational and Design Study of RIM Machines
https://doi.org/10.3139/217.1714

Articles in the same Issue

  1. Editorial
  2. Structure Development in Polyolefin Processing
  3. Screw Extrusion
  4. A New Style Single Screw Extruder with Improved Plastification and Output Power
  5. Visualisation and Analysis of the Flow along the Kneading Block of a Twin-screw Extruder
  6. Resonant and Invariant Advection in Single-Screw Extrusion
  7. Compounding
  8. PP-based Model Compounds as Tools for the Development of High-impact-ethylene-propylene Copolymers
  9. Die Extrusion
  10. Modelling of the Flow in the Distribution Plate of a Spin Pack
  11. Free-radical Reactions and Thermal Effects in PE during Pipe Extrusion
  12. Calendering
  13. Simultaneous Calculation of Roll Deformation and Polymer Flow in the Calendering Process
  14. Fiber and Film
  15. Investigation of Bubble Instabilities in Film Blowing Process
  16. Injection Molding
  17. Flow Visualization of Filling Process during Micro-Injection Molding
  18. Thermoforming
  19. The Role of Tool/Sheet Contact in Plug-assisted Thermoforming
  20. A Comparison of the Axisymmetric and Planar Elongational Viscosities of PE-LD
  21. Pultrusion
  22. Polymer Melt Impregnation of Glass Roving
  23. Reaction Injection Molding
  24. Operational and Design Study of RIM Machines
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