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Melt Flow Properties of LDPE/HDPE Blends in Capillary Extrusion

  • J. Z. Liang , R. K. Y. Li and S. C. Tjong
Published/Copyright: June 4, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 13 Issue 1

Abstract

The melt flow properties of LDPE/HDPE blends in capillary extrusion have been investigated. It is found that the End pressure losses (ΔPend) increase as a form of non-linear function with increasing the wall shear stress (τw) and the ΔPend value of the sample is the minimum at the weight percentage content of HDPE (ΦHD) being 50% when the τw is fixed. The blend melt flow basically obeys the power law and the sensitivity of the melt viscosity (ηw) on the wall shear rate (γw) is weakened with increasing the ϕHD. Synergistic effect is obvious for the blend melts under experimental conditions. When the τw is 42.5KPa, the ηw value achieves the maximum at the ϕHD = 20%. In addition, the relationship between the ηw and the test temperature approximately accords with the Arrhenius equation as the τw is fixed.

* Mail address: Prof. J. Z. Liang, Dept. of Physics and Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, P.R.C. and Dept. of Chemical Machinery, South China University of Technology, Guangzhou 510641, P.R.C.
Received: 1997-9-8
Accepted: 1998-2-5
Published Online: 2013-06-04
Published in Print: 1998-03-01

© 1998, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. J. A. Biesenberger, G. Astarita, D. C. Bogue
  5. Screw Extrusion/Mixing
  6. Modeling Solids Conveying in Polymer Extruders
  7. Comparison between LDPE Conventional and Autothermal Extrusion Characteristics
  8. Transesterification of Ethylene Acetate Copolymer in a Twin Screw Extruder
  9. Stabilising the Structure of HDPE by the Use of Highly-dispersed Mixture of Fe/FeO
  10. Pumping Characteristics of an Intermeshing Co-rotating Twin Screw Extruder
  11. Flow Behaviour of Blends of Poly(ethylene-Co-Acrylic Acid) and Epoxidised Natural Rubber
  12. Die Extrusion
  13. Rheological Behaviour of HDPE/PA 11 Blends
  14. Melt Flow Properties of LDPE/HDPE Blends in Capillary Extrusion
  15. Fibers and Film
  16. Rheological Behaviour of LLDPE/LDPE Blends under Elongational Deformation
  17. Processing/Structure Relationships of Mica-Filled PE-Films with Low Oxygen Permeability
  18. On the Charge State of Melt-Blown Polymer Materials
  19. Temperature Measuring in Plastics Processing with Infrared Radiation Thermometers
  20. Comparative Study of Structure Development in Melt Spinning Polyolefin Fibers
  21. Moulding
  22. Sintering Rheology of Semi-Crystalline Polymers
  23. Molding
  24. Melt Flow Instabilities of Filled HDPE
  25. Experimental Validation of Shrinkage Predictions for Injection Molded Products
https://doi.org/10.3139/217.980046

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. J. A. Biesenberger, G. Astarita, D. C. Bogue
  5. Screw Extrusion/Mixing
  6. Modeling Solids Conveying in Polymer Extruders
  7. Comparison between LDPE Conventional and Autothermal Extrusion Characteristics
  8. Transesterification of Ethylene Acetate Copolymer in a Twin Screw Extruder
  9. Stabilising the Structure of HDPE by the Use of Highly-dispersed Mixture of Fe/FeO
  10. Pumping Characteristics of an Intermeshing Co-rotating Twin Screw Extruder
  11. Flow Behaviour of Blends of Poly(ethylene-Co-Acrylic Acid) and Epoxidised Natural Rubber
  12. Die Extrusion
  13. Rheological Behaviour of HDPE/PA 11 Blends
  14. Melt Flow Properties of LDPE/HDPE Blends in Capillary Extrusion
  15. Fibers and Film
  16. Rheological Behaviour of LLDPE/LDPE Blends under Elongational Deformation
  17. Processing/Structure Relationships of Mica-Filled PE-Films with Low Oxygen Permeability
  18. On the Charge State of Melt-Blown Polymer Materials
  19. Temperature Measuring in Plastics Processing with Infrared Radiation Thermometers
  20. Comparative Study of Structure Development in Melt Spinning Polyolefin Fibers
  21. Moulding
  22. Sintering Rheology of Semi-Crystalline Polymers
  23. Molding
  24. Melt Flow Instabilities of Filled HDPE
  25. Experimental Validation of Shrinkage Predictions for Injection Molded Products
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