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Melt Strength Behavior of Polyethylene Blends**

  • A. Ghijsels , J. J. S. M. Ente and J. Raadsen
Published/Copyright: May 27, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 7 Issue 1

Abstract

Melt strength data are presented on different types of binary polyethylene blends as linear low density polyethylene/low density polyethylene (LLDPE/LDPE), linear low density polyethylene/high density polyethylene (LLDPE/HDPE) and LDPE/LDPE. Melt strength was assessed from uniaxial tensile experiments with a Rheotens apparatus. In addition, the blends were characterised in terms of a few other rheological properties such as the zero-shear viscosity and the extrudate swell in capillary extrusion. For the LLDPE/LDPE blend pairs synergistic effects were observed for the melt strength and some other properties. No melt strength synergism was observed for the LLDPE/HDPE and the LDPE/ LDPE blends. The results are discussed in terms of the Bersted model on the effects of long chain branching on the low-shear melt viscosity of polyethylenes.

* Mailing address: Ir. A. Ghijsels, Chemical Research Center, Shell Louvain-la-Neuve, P.O. Box 30, B-1348 Ottignies Louvain-la-Neuve, Belgium.

** Based on paper presented at the 2nd Rolduc Polymer Meeting, Kerkrade, The Netherlands, April 26–30, 1987 [1].

Received: 1991-6-12
Accepted: 1991-10-24
Published Online: 2013-05-27
Published in Print: 1992-03-01

© 1992, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Internal and Continuous Mixers
  4. Model Development for an Internal Mixer
  5. Simulation of Flow in a Farrel Continuous Mixer
  6. Extrusion
  7. Influence of Process Data on the Throughput of Large Extruders within the Range of 600 to 6 000 kg/h
  8. Conveying and Melting in Screw Extruders with Axial Screw Movement
  9. Thermo-viscous Effects in Extrusion of Planar Jets with Solidification
  10. Film
  11. Dynamics and Stability of Double Bubble Tubular Film Extrusion
  12. Melt Strength Behavior of Polyethylene Blends**
  13. Optical Properties and Orientation Development in Uniaxially Stretched Syndiotactic Polystyrene from Amorphous Precursors
  14. Molding
  15. Thermoviscoelastic Calculation of Residual Stresses and Residual Shapes of Injection Molded Parts**
  16. Analysis and Simulation of Structural Reaction Injection Molding (SRIM)
  17. Crystal Orientation in Injection Moldings of Flaky Filler-Filled Polypropylenes
  18. Erratum
  19. Molecular Orientation in Injection-molded Polypropylene Copolymers with Ethylene
https://doi.org/10.3139/217.920044

Articles in the same Issue

  1. Contents
  2. Contents
  3. Internal and Continuous Mixers
  4. Model Development for an Internal Mixer
  5. Simulation of Flow in a Farrel Continuous Mixer
  6. Extrusion
  7. Influence of Process Data on the Throughput of Large Extruders within the Range of 600 to 6 000 kg/h
  8. Conveying and Melting in Screw Extruders with Axial Screw Movement
  9. Thermo-viscous Effects in Extrusion of Planar Jets with Solidification
  10. Film
  11. Dynamics and Stability of Double Bubble Tubular Film Extrusion
  12. Melt Strength Behavior of Polyethylene Blends**
  13. Optical Properties and Orientation Development in Uniaxially Stretched Syndiotactic Polystyrene from Amorphous Precursors
  14. Molding
  15. Thermoviscoelastic Calculation of Residual Stresses and Residual Shapes of Injection Molded Parts**
  16. Analysis and Simulation of Structural Reaction Injection Molding (SRIM)
  17. Crystal Orientation in Injection Moldings of Flaky Filler-Filled Polypropylenes
  18. Erratum
  19. Molecular Orientation in Injection-molded Polypropylene Copolymers with Ethylene
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