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Structures and Properties of Injection Moldings of Flaky Filler-filled Polypropylenes

Published/Copyright: May 27, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 7 Issue 4

Abstract

A polypropylene was filled with 0 to 30 wt.-% of flaky fillers such as glass flake, mica, or talc, which had similar particle sizes and different aspect ratios and crystallization temperatures. Flexural test specimens were injection-molded from the filled polypropylenes at cylinder temperatures of 200 to 320°C. Properties such as flexural modulus, flexural strength, heat distortion temperature, Izod impact strength, and mold shrinkage and higher-order structures such as crystallinity, β-crystal content, thickness of skin layer, a'-axis-oriented component fraction, and crystalline orientation fraction were measured and structure-property relationships were studied. A simulation of molecular orientation was carried out from a viewpoint of melt orientation at the gate and its relaxation in the mold cavity.

* Mail address: Dr. M. Fujiyama, Polymer Research Laboratory, Tokuyama Soda Co., Ltd., Tokuyama-shi, Yamaguchi-ken 745, Japan.
Received: 1992-1-22
Accepted: 1992-4-15
Published Online: 2013-05-27
Published in Print: 1992-12-01

© 1992, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Invited Paper
  4. New and Unconventional Methods for Recycling Mixed Plastic Scrap
  5. Internal Mixers
  6. Simulating Polymer Mixing Processes Using the Boundary Element Method
  7. Extrusion
  8. Experimental Study of High Reynolds' Number Flows Between Narrow Gaps
  9. Analysis of an Alternative Extruder Screw Pump Design
  10. Film
  11. Effect of Biaxial Stretching on Thickness Uniformity and Surface Roughness of PET and PPS Films
  12. Isothermal and Anisothermal Models for Cast Film Extrusion
  13. Molding
  14. Crystalline Orientation in Injection Molded Polyethylene Parts
  15. Structures and Properties of Injection Moldings of Flaky Filler-filled Polypropylenes
https://doi.org/10.3139/217.920358

Articles in the same Issue

  1. Contents
  2. Contents
  3. Invited Paper
  4. New and Unconventional Methods for Recycling Mixed Plastic Scrap
  5. Internal Mixers
  6. Simulating Polymer Mixing Processes Using the Boundary Element Method
  7. Extrusion
  8. Experimental Study of High Reynolds' Number Flows Between Narrow Gaps
  9. Analysis of an Alternative Extruder Screw Pump Design
  10. Film
  11. Effect of Biaxial Stretching on Thickness Uniformity and Surface Roughness of PET and PPS Films
  12. Isothermal and Anisothermal Models for Cast Film Extrusion
  13. Molding
  14. Crystalline Orientation in Injection Molded Polyethylene Parts
  15. Structures and Properties of Injection Moldings of Flaky Filler-filled Polypropylenes
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