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A Stick-Slip Problem Related to Melt Fracture in Polymer Processing Operations

  • K. E. P. Adewale , O. Olabisi , A. A. Oyediran und V. O. S. Olunloyo
Veröffentlicht/Copyright: 27. Mai 2013
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International Polymer Processing
Aus der Zeitschrift International Polymer Processing Band 6 Heft 3

Abstract

A ‘Stick-Slip’ mixed-boundary model is postulated to support the mechanism of transition from no-slip to slip at the polymer/die interface during capillary extrusion of polymeric materials at and above a critical shear rate at a fixed throughput. The predicted shear stress singularity explains the occurence of gross extrudate distortion known as melt fracture.

* Mail and present address: K. E. P. Adewale, Dept. of Polymer Engineering, University of Akron, Akron, Ohio 44325-0301, U.S.A.
Received: 1990-6-29
Accepted: 1990-6-29
Published Online: 2013-05-27
Published in Print: 1991-09-01

© 1991, Carl Hanser Verlag, Munich

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Die Extrusion
  4. Finite Element Analysis of Polymer Melt Flow in Profile Extrusion Coating Die
  5. Simultaneous Diameter and Thickness Control in Tube Extrusion
  6. A Stick-Slip Problem Related to Melt Fracture in Polymer Processing Operations
  7. Effects of Plasticizers on Extrusion of Dry Blended PVC
  8. Flow-Induced Crystallization and Self-Reinforcement During Extrusion
  9. Molding
  10. A Fundamental Experimental Study of the Mechanisms of Warpage and Shrinkage of Polyethylene in Rotational Molding
  11. Closed Loop Control of Parison Dimension Profiles in Extrusion Blow Molding
  12. Liquid Crystal Polyesters
  13. Effect of Thermal History on Viscoelastic Properties of Thermotropic Liquid Crystalline Copolyesters
  14. Molecular Orientation and Modulus of a Thermotropic Liquid Crystalline Copolyester
  15. Production and Characterization of Fine-dispersed Mixtures of Liquid Crystalline with Conventional Polymers
  16. Processing and Properties of Polycarbonate/Liquid Crystal Polymer Blends
  17. Rapid Communication of Recent Advances
  18. Generation of Corners in Profile Extrusion**
  19. Coextruded Infrared Reflecting Films
https://doi.org/10.3139/217.910195

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Die Extrusion
  4. Finite Element Analysis of Polymer Melt Flow in Profile Extrusion Coating Die
  5. Simultaneous Diameter and Thickness Control in Tube Extrusion
  6. A Stick-Slip Problem Related to Melt Fracture in Polymer Processing Operations
  7. Effects of Plasticizers on Extrusion of Dry Blended PVC
  8. Flow-Induced Crystallization and Self-Reinforcement During Extrusion
  9. Molding
  10. A Fundamental Experimental Study of the Mechanisms of Warpage and Shrinkage of Polyethylene in Rotational Molding
  11. Closed Loop Control of Parison Dimension Profiles in Extrusion Blow Molding
  12. Liquid Crystal Polyesters
  13. Effect of Thermal History on Viscoelastic Properties of Thermotropic Liquid Crystalline Copolyesters
  14. Molecular Orientation and Modulus of a Thermotropic Liquid Crystalline Copolyester
  15. Production and Characterization of Fine-dispersed Mixtures of Liquid Crystalline with Conventional Polymers
  16. Processing and Properties of Polycarbonate/Liquid Crystal Polymer Blends
  17. Rapid Communication of Recent Advances
  18. Generation of Corners in Profile Extrusion**
  19. Coextruded Infrared Reflecting Films
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