Journal of Materials Science

, Volume 30, Issue 5, pp 1139–1143 | Cite as

Microstructure of bulk crystallized linear polyethylene: correlation of microhardness and yield stress

  • F. J. Baltá Calleja
  • L. Giri
  • I. M. Ward
  • D. L. M. Cansfield


The effect of molecular weight on the yield behaviour and microhardness of meltcrystallized polyethylene has been studied. The influence of the crystallization conditions on the mechanical properties has been examined. It is shown that Tabor's relationship between microhardness and yield stress applies if the strain rate of the tensile tests is comparable to that employed in the hardness indentation tests. Results are discussed in terms of surface free energy which depends on the number of molecular entanglements segregated on to the surface of the lamellar crystals controlling the yield behaviour of the polymer.


Polymer Microstructure Molecular Weight Mechanical Property Crystallization 
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Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • F. J. Baltá Calleja
    • 1
  • L. Giri
    • 1
  • I. M. Ward
    • 2
  • D. L. M. Cansfield
    • 2
  1. 1.Instituto de Estructura de la MateriaCSICMadridSpain
  2. 2.IRC in Polymer Science and TechnologyUniversity of LeedsLeedsUK

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