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Die Wall Effects, Contact Angles and Slippage in the Flow of Polymer Melts and Polymer-Particulate Compounds with Carboxylic Acids in a Slit Die

  • S. Ahn and J. L. White
Published/Copyright: May 2, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 19 Issue 1

Abstract

An experimental study of the influence of carboxylic acid additive in polyethylene/filler and polystyrene/filler compounds in slit die is described. Slit die extrusion experiments and contact angle measurements are reported. A series of fillers of varying particle size including carbon black, calcium carbonate, zinc oxide, and talc are compared. Aliphatic fatty acids, especially octadecanoic acid were used as additives. The greatest viscosity reduction was found in polyethylene/(carbon black) and polystyrene/(calcium carbonate) compounds. Smaller effects are found with the other polyethylene/filler compounds and none in polystyrene/filler compounds. Contact angle experiments indicated carboxylic acid layers on the die surfaces for the polyethylene and not the polystyrene compounds. Mechanisms for this behavior are discussed.

∗ Mail address: J. L. White, Inst. of Polym. Eng., University of Akron, Akron, OH 44325, USA E-mail:

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Received: 2003-6-13
Accepted: 2003-11-21
Published Online: 2013-05-02
Published in Print: 2004-03-01

© 2004, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Screw Extrusion
  4. Physico-Mathematical Model for the Description of the Temperature Development and the Power Consumption in Co-Rotating Twin Screw Extruders
  5. Prediction of Residence Time Distribution for Different Screw Configurations of a Ko-Kneader by using a Cluster Model
  6. Die Extrusion
  7. In-line Monitoring of PVC Melt Viscosity Using Dielectric Measurements
  8. Die Wall Effects, Contact Angles and Slippage in the Flow of Polymer Melts and Polymer-Particulate Compounds with Carboxylic Acids in a Slit Die
  9. Crystallization
  10. Fractionated Crystallization and Morphology in Binary Blends of Isotactic PP and HDPE with Cycloolefin Copolymers
  11. Impact Strength of β-Nucleated Polypropylene
  12. Film
  13. Extensional Rheology of Polypropylene in Relation to Processing Characteristics
  14. Thickness Uniformity of Double Bubble Tubular Film Process for Producing Biaxially Oriented PA 6 Film
  15. Bowing Phenomenon in Double Bubble Tubular Film Processing for PA 6
  16. Molding
  17. A New Design Method to Improve Flow Uniformity in a Reaction Injection Mold Entry
  18. Three Dimensional Analysis of Shape Deformation in Injection Molded Optical Lens
  19. Development of a Hybrid Solid-Microcellular Co-injection Molding Process
  20. PPS News
  21. PPS News
https://doi.org/10.3139/217.1811

Articles in the same Issue

  1. Contents
  2. Contents
  3. Screw Extrusion
  4. Physico-Mathematical Model for the Description of the Temperature Development and the Power Consumption in Co-Rotating Twin Screw Extruders
  5. Prediction of Residence Time Distribution for Different Screw Configurations of a Ko-Kneader by using a Cluster Model
  6. Die Extrusion
  7. In-line Monitoring of PVC Melt Viscosity Using Dielectric Measurements
  8. Die Wall Effects, Contact Angles and Slippage in the Flow of Polymer Melts and Polymer-Particulate Compounds with Carboxylic Acids in a Slit Die
  9. Crystallization
  10. Fractionated Crystallization and Morphology in Binary Blends of Isotactic PP and HDPE with Cycloolefin Copolymers
  11. Impact Strength of β-Nucleated Polypropylene
  12. Film
  13. Extensional Rheology of Polypropylene in Relation to Processing Characteristics
  14. Thickness Uniformity of Double Bubble Tubular Film Process for Producing Biaxially Oriented PA 6 Film
  15. Bowing Phenomenon in Double Bubble Tubular Film Processing for PA 6
  16. Molding
  17. A New Design Method to Improve Flow Uniformity in a Reaction Injection Mold Entry
  18. Three Dimensional Analysis of Shape Deformation in Injection Molded Optical Lens
  19. Development of a Hybrid Solid-Microcellular Co-injection Molding Process
  20. PPS News
  21. PPS News
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