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Journal of Materials Science

, Volume 27, Issue 10, pp 2799–2806 | Cite as

Influence of molecular weight and branch content on the fracture behaviour of polyethylene

  • S. -W. Tsui
  • R. A. Duckett
  • I. M. Ward
Papers

Abstract

The fracture behaviour of a range of polyethylenes with different molecular weights and side group content has been studied by means of a novel high-pressure tensile testing facility. The normally ductile specimens became brittle at high pressures, e.g. 700 MPa, so that the test results could be studied by means of linear elastic fracture mechanics. Oriented specimens were prepared by die-drawing to draw ratios of 5∶1 and 9.5∶1. The performance of the isotropic and oriented (longitudinal and transverse directions) materials were assessed using their KIC values. Results were carefully compared in order to study the effects of molecular weight and low concentrations of small side groups on the fracture behaviour of polyethylene. The structure of the oriented polymers was characterised using wide-angle X-ray diffraction.

Keywords

Polymer Molecular Weight Polyethylene Brittle Tensile Testing 
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

© Chapman & Hall 1992

Authors and Affiliations

  • S. -W. Tsui
    • 1
  • R. A. Duckett
    • 1
  • I. M. Ward
    • 1
  1. 1.Department of PhysicsUniversity of LeedsLeedsUK

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