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Polymer Mechanics

, Volume 3, Issue 1, pp 26–30 | Cite as

Two-dimensional extension of polyethylene and polypropylene film

  • N. P. Novikov
Article

Abstract

The two-dimensional extension of polyethylene and polypropylene film has been investigated by optical microscopy. It has been established that there is no two-dimensional plastic flow (two-dimensional necking) and that failure is quasi-brittle in character. In a small region near the cracks that develop, uniaxial orientation of the polymer associated with stress concentrations near the crack tip is observed. Measurements show that the ultimate stress in two-dimensional extension is close to the necking stress in uniaxial tension.

Keywords

Polymer Microscopy Polyethylene Optical Microscopy Polypropylene 
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

© The Faraday Press, Inc. 1970

Authors and Affiliations

  • N. P. Novikov
    • 1
  1. 1.Institute of Problems of Mechanics, AS USSRMoscow

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