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Influence of Low Molecular Weight Additives on Die Extrusion Rheometer Flow of Thermoplastic Melts

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Published/Copyright: June 3, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 18 Issue 3

Abstract

An experimental study of slippage induced in various thermoplastics in rheometers by the presence of small amount of low molecular weight additives is described. Capillary and cone-plate experiments are reported. A series of polymers of varying polarity including polyethylene, polypropylene, polystyrene, poly (methyl methacrylate) and polyamide 12 are compared. Five eighteen-carbon amphiphilic ω-compounds are used as additives including octadecanoic acid, octadecanamide, octadecanol, calcium stearate and zinc stearate. The greatest effects were found in polyethylene and polypropylene. Little or no effects are found with the other polymers. The most effective additives were octadecanoic acid and zinc stearate. Octadecanamide and octadecanol had some effectiveness. Mechanisms for this behavior are described.

* Mail address: J. L. White, Inst. of Polym. Eng., University of Akron, Akron, OH 44325, USA
Received: 2002-3-20
Accepted: 2003-3-3
Published Online: 2013-06-03
Published in Print: 2003-09-01

© 2003, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. First in a Series: Polymer Processing in Developing Countries Polymer Processing in Peru
  5. Screw Extrusion
  6. Modeling and Analysis of Helicoidal Flow in a Conical Extruder
  7. A Powerful Universal Plasticating System for Single-screw-extruders and Injection-moulding Machines
  8. Cross Channel Flow Velocity and Motion Trajectory of Polymers in a Helical Channel
  9. Mixing and Compounding
  10. Influence of Low Molecular Weight Additives on Die Extrusion Rheometer Flow of Thermoplastic Melts
  11. Design of a Static Temperature Scanning Ultrasonic Measurement System and Application to Multi-phase Polymer Systems
  12. Raman Spectroscopy as an On-line Technique to Monitor Shear Flow Effect on Partially Miscible Polymer Blends
  13. Reactive Extrusion
  14. Flow Effects on Polymer Transesterification
  15. A Dynamic Model Accounting for Oscillating Behavior in Reactive Extrusion
  16. Study on Functionalization of Isotactic PP with Maleic Anhydride in an Internal Mixer and a Twin-screw Extruder
  17. Quality Aspects on the Power Cable Core Insulation Extrusion and Thermal Curing Process
  18. Die Extrusion
  19. Flow Balancing in Extrusion Dies for Thermoplastic Profiles
  20. Flow Balancing in Extrusion Dies for Thermoplastic Profiles
  21. Molding
  22. On the Residual Stress and Shrinkage in Injection Compression Molding
https://doi.org/10.3139/217.1742

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. First in a Series: Polymer Processing in Developing Countries Polymer Processing in Peru
  5. Screw Extrusion
  6. Modeling and Analysis of Helicoidal Flow in a Conical Extruder
  7. A Powerful Universal Plasticating System for Single-screw-extruders and Injection-moulding Machines
  8. Cross Channel Flow Velocity and Motion Trajectory of Polymers in a Helical Channel
  9. Mixing and Compounding
  10. Influence of Low Molecular Weight Additives on Die Extrusion Rheometer Flow of Thermoplastic Melts
  11. Design of a Static Temperature Scanning Ultrasonic Measurement System and Application to Multi-phase Polymer Systems
  12. Raman Spectroscopy as an On-line Technique to Monitor Shear Flow Effect on Partially Miscible Polymer Blends
  13. Reactive Extrusion
  14. Flow Effects on Polymer Transesterification
  15. A Dynamic Model Accounting for Oscillating Behavior in Reactive Extrusion
  16. Study on Functionalization of Isotactic PP with Maleic Anhydride in an Internal Mixer and a Twin-screw Extruder
  17. Quality Aspects on the Power Cable Core Insulation Extrusion and Thermal Curing Process
  18. Die Extrusion
  19. Flow Balancing in Extrusion Dies for Thermoplastic Profiles
  20. Flow Balancing in Extrusion Dies for Thermoplastic Profiles
  21. Molding
  22. On the Residual Stress and Shrinkage in Injection Compression Molding
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