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Maximum Properties Achieved by Uniaxial Drawing of High Molecular Weight Polyolefins

  • Tetsuo Kanamoto
  • Roger S. Porter

Abstract

Several flexible chain polymers of ultrahigh molecular weights (UHMW) have been uniaxially drawn from different morphologies by three techniques, including solid-state extrusion, tensile drawing, and their sequential combination (two-stage drawing). Among these, solution-grown single crystal (SGC) mats of UHMW-polyethylene, polypropylene, and poly(4-methyl-1-pentene) have been superdrawn, by two-stage drawing, to the limits in terms of mechanical and physical properties approaching theoretical limits. The morphlogies of such samples have been studied by density, DSC melting behavior, X-ray small- and wide-angle diffraction, thermal expansivity, etc. The results showed a significant difference in the microstructure between UHMW-PE and UHMW-PP superdrawn to the limits.

Keywords

Draw Ratio Tensile Modulus Tensile Drawing Flexible Chain Polymer Draw Temperature 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Elsevier Science Publishers Ltd 1989

Authors and Affiliations

  • Tetsuo Kanamoto
    • 1
  • Roger S. Porter
    • 2
  1. 1.Department of Applied ChemistryScience University of TokyoKagurazaka, Shinjuku-ku, TokyoJapan
  2. 2.Department of Polymer Science and EngineeringUniversity of MassachusettsAmherstUSA

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