Journal of Materials Science

, Volume 14, Issue 4, pp 850–862 | Cite as

Deformation of poly (dienes) below Tg

Part 1 Radical formation and crazing in cross-linked poly(dienes)
  • W. T. Mead
  • Roger S. Porter
  • P. E. Reed
Papers
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Abstract

Cross-linked poly(dienes) (polychloroprene, polyisoprene and polybutadiene) are shown to exhibit crazing when subjected to low strain-rate tensile tests at low temperatures. Conditions for crazing to occur in the polybutadienes are examined. It is found that observable crazing occurs providing the rubbers are (a) slightly oriented, (b) stretched below their glass transition temperature (Tg) and (c) deformed in an environment which is close to its liquefaction or sublimation point. Gases evolved after low temperature testing are shown to be dissolved gases from the test environment. The interrelationship between the mechanical properties of the rubbers, quantity of gas absorbed and the radicals formed by scission of the network molecules is explored.

Keywords

Rubber Transition Temperature Glass Transition Tensile Test Glass Transition 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

© Chapman and Hall Ltd. 1979

Authors and Affiliations

  • W. T. Mead
    • 1
  • Roger S. Porter
    • 1
  • P. E. Reed
    • 1
  1. 1.Department of MaterialsQueen Mary CollegeLondonUK

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