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Melting of Polymer Blends in Co-rotating Twin Screw Extruders

Part I: Experimental Investigations and Models – A Review
  • M. Bastian
Published/Copyright: June 5, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 16 Issue 2

Abstract

The properties of polymer blends are conditioned to a large extent by the morphological structure of the polymer combinations employed. Since the development of the morphology inside the extruder is essentially influenced by the melting section, it is necessary to be able to estimate the melting process of binary material combinations. Part I of this publication summarises the knowledge that has been acquired in theoretical and experimental studies of melting in co-rotating, tightly-intermeshing twin screw extruders. The experimental studies reveal quite dissimilar melting mechanisms for different materials in some cases. Different models are thus available for calculating the melting process of single-component materials which have been developed on the basis of the findings established in experimental investigations. Only one model is so far familiar for the melting process of multi-material systems. This uses material values for polymer blends that have been averaged out with mixing rules to provide the basis for a calculation to estimate the melting process.

Part II of the publication describes a model for calculating the melting of binary, incompatible polymer combinations which has been implemented in the SIGMA simulation software for the design of co-rotating twin screw extruders. This model can be used to calculate the temperature development in the solids conveying section and the subsequent melting process.

Part III of the publication explains one possible means of investigating the melting of binary polymer combinations and discusses the results of experimental studies of polypropylene/polyamide blends. For purposes of verifying the model set out in this part of the publication, the simulation calculations are compared with the results of the experimental studies.

* Mail address: M. Bastian, German Institute of Polymers, Schloss-gartenstrasse 6, D-64289 Darmstadt, Germany
Received: 1999-7-14
Accepted: 2001-2-19
Published Online: 2013-06-05
Published in Print: 2001-05-01

© 2001, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Editorial
  2. Ninth of a Series Pioneer of the Modular Co-rotating Twin Screw Extruder–Rudolf Erdmenger (1911–1991)
  3. Internal Mixer
  4. The “New-Generation” Co-flow Intermeshing Internal Mixer
  5. Screw Extrusion/Continuous Mixers
  6. Twin Screw Compounding of PE-HD Wood Flour Composites
  7. A Transient Melting Model of Polymer Balls Sliding Against the Barrel
  8. Prediction of Screw Length Required for Polymer Melting and Melting Characteristics
  9. Melting of Polymer Blends in Co-rotating Twin Screw Extruders
  10. Melting of Polymer Blends in Co-rotating Twin Screw Extruders
  11. Melting of Polymer Blends in Co-rotating Twin Screw Extruders
  12. The Mapping Method for Mixing Optimization Part I: The Multiflux Static Mixer
  13. The Mapping Method for Mixing Optimization
  14. Reactive Processing
  15. Comparison Studies of Anionic Polymerization of Caprolactam in Different Twin Screw Extruders
  16. Compatibilization of SBR/NBR Blends Using Chemically Modified Styrene Butadiene Rubber
  17. Coextrusion
  18. Convective Instabilities in the Coextrusion Process
  19. Numerical Simulation of Polymer Coextrusion Flows
  20. Thermoforming
  21. Tight Tolerance Thermoforming
https://doi.org/10.3139/217.1632

Articles in the same Issue

  1. Editorial
  2. Ninth of a Series Pioneer of the Modular Co-rotating Twin Screw Extruder–Rudolf Erdmenger (1911–1991)
  3. Internal Mixer
  4. The “New-Generation” Co-flow Intermeshing Internal Mixer
  5. Screw Extrusion/Continuous Mixers
  6. Twin Screw Compounding of PE-HD Wood Flour Composites
  7. A Transient Melting Model of Polymer Balls Sliding Against the Barrel
  8. Prediction of Screw Length Required for Polymer Melting and Melting Characteristics
  9. Melting of Polymer Blends in Co-rotating Twin Screw Extruders
  10. Melting of Polymer Blends in Co-rotating Twin Screw Extruders
  11. Melting of Polymer Blends in Co-rotating Twin Screw Extruders
  12. The Mapping Method for Mixing Optimization Part I: The Multiflux Static Mixer
  13. The Mapping Method for Mixing Optimization
  14. Reactive Processing
  15. Comparison Studies of Anionic Polymerization of Caprolactam in Different Twin Screw Extruders
  16. Compatibilization of SBR/NBR Blends Using Chemically Modified Styrene Butadiene Rubber
  17. Coextrusion
  18. Convective Instabilities in the Coextrusion Process
  19. Numerical Simulation of Polymer Coextrusion Flows
  20. Thermoforming
  21. Tight Tolerance Thermoforming
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