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Microcellular Wood Fibre Reinforced PP Composites

A Comparative Study Between Extrusion, Injection Moulding and Compression Moulding
  • A. K. Bledzki und O. Faruk
Veröffentlicht/Copyright: 26. März 2013
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International Polymer Processing
Aus der Zeitschrift International Polymer Processing Band 21 Heft 3

Abstract

Microcellular wood fibre reinforced polymers have practical significance given the possibility of reducing the density of automotive components due to their microcellular structure, as well as processing and performance advantages. A microcellular foaming process with a chemical foaming agent was applied at an experimental stage to injection moulding, extrusion and compression moulding of wood fibre reinforced polypropylene composites. The focus of the research was to investigate these processes using a chemical foaming agent and to perform comparative studies of the physico-mechanical properties of microcellular materials. The effects of the presence of the chemical foaming agent (exothermic) and variation of its content on density, microvoid content, mechanical properties (tensile and flexural), odour concentration and cell morphology of microcellular polypropylene-wood fibre composites were studied. The morphology, cell size, shape and distribution of the microcells were investigated using scanning electron micrographs. Injection moulding process produced finer microcellular structures in comparison with the other processes. As compared to the non foamed composites, the density reduced maximum 30% (0.741 g/cm3), 20% (0.837 g/cm3) and 22% (0.830 g/cm3) for the injection moulding, extrusion and compression moulding process respectively. The chemical foaming agent reduced the odour concentration in relation to the same non foamed composites. Injection moulding showed better performance in comparison with extrusion and compression moulding in terms of cell morphology, density reduction, odour concentration and mechanical properties.

∗ Mail address: A. K. Bledzki, Institut für Werkstofftechnik, Kunststoff- und Recyclingtechnik University of Kassel, Mönchebergstr.3, D-34109 Kassel, Germany. E-mail:

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Received: 2005-07-07
Accepted: 2006-01-09
Published Online: 2013-03-26
Published in Print: 2006-07-01

© 2006, Hanser Publishers, Munich

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Regular Contributed Articles
  4. New Multicomponent Compatibilization System for Polyolefin/Polystyrene Blends
  5. Preparation and Characterization of HMW PA 6 via Anionic Polymerization of ∊-Caprolactam by Using a Mixture of Di- and Tri-functional Chain Initiators
  6. Polymer Processing Extrusion Instabilities and Methods for their Elimination or Minimisation
  7. Microcellular Wood Fibre Reinforced PP Composites
  8. Effects of Take-up Speed of Melt Spinning on the Structure and Mechanical Propertiesof Maximally Laser Drawn PA9-T Fibers
  9. Description of the Pressure/Throughput Behavior of a Single-screw Plasticating Unit in Consideration of Wall Slippage Effects for Non-Newtonian Material and 1-D flow
  10. Study of Starch Gelatinization in a Flow Field Using Simultaneous Rheometric Data Collection and Microscopic Observation
  11. Analysis of the Residual Stresses in the Process of Nanoimprint Lithography
  12. The Reactive Extrusion of Thermoplastic Polyurethane and the Effect of the Depolymerization Reaction
  13. Simulation of Core Deflection in Powder Injection Molding
  14. Experimental Investigation of the Cooling Flow in the Film Blowing Process
  15. Study of the Compatibilizer Effect on Blends Prepared from Waste Poly(ethylene-terephthalate) and High Density Polyethylene
  16. PPS News
  17. PPS News
  18. Seikei-Kakou Abstracts
  19. Seikei-Kakou Abstracts
https://doi.org/10.3139/217.0085

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Regular Contributed Articles
  4. New Multicomponent Compatibilization System for Polyolefin/Polystyrene Blends
  5. Preparation and Characterization of HMW PA 6 via Anionic Polymerization of ∊-Caprolactam by Using a Mixture of Di- and Tri-functional Chain Initiators
  6. Polymer Processing Extrusion Instabilities and Methods for their Elimination or Minimisation
  7. Microcellular Wood Fibre Reinforced PP Composites
  8. Effects of Take-up Speed of Melt Spinning on the Structure and Mechanical Propertiesof Maximally Laser Drawn PA9-T Fibers
  9. Description of the Pressure/Throughput Behavior of a Single-screw Plasticating Unit in Consideration of Wall Slippage Effects for Non-Newtonian Material and 1-D flow
  10. Study of Starch Gelatinization in a Flow Field Using Simultaneous Rheometric Data Collection and Microscopic Observation
  11. Analysis of the Residual Stresses in the Process of Nanoimprint Lithography
  12. The Reactive Extrusion of Thermoplastic Polyurethane and the Effect of the Depolymerization Reaction
  13. Simulation of Core Deflection in Powder Injection Molding
  14. Experimental Investigation of the Cooling Flow in the Film Blowing Process
  15. Study of the Compatibilizer Effect on Blends Prepared from Waste Poly(ethylene-terephthalate) and High Density Polyethylene
  16. PPS News
  17. PPS News
  18. Seikei-Kakou Abstracts
  19. Seikei-Kakou Abstracts
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