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Polypropylene for Pressure Pipes—From Polymer Design to Long-Term Performance

  • L. Boragno
  • H. Braun
  • A. M. Hartl
  • R. W. Lang
Chapter
Part of the Springer Series in Materials Science book series (SSMATERIALS, volume 247)

Abstract

In order to create polypropylene materials that meet pipe applications requirements, good knowledge of the material’s structure–property relationships is necessary, as well as the right analytical tools to assess the final properties. The effect of crystallisation conditions, polymorphism and processing on the impact resistance of some nucleated pipe grades was studied. A dependency between polymorphism, process conditions and final pipe properties is reported. A short-term method for measuring the slow crack growth was successfully developed and applied, and a crack has been observed via microscopy. It was observed that a large plastic zone is formed in the specimen before the crack initiation and also ahead of the crack tip.

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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • L. Boragno
    • 1
  • H. Braun
    • 1
  • A. M. Hartl
    • 2
  • R. W. Lang
    • 2
  1. 1.Borealis Polyolefine GmbHLinzAustria
  2. 2.Institute of Polymeric Materials and Testing, Johannes Kepler University LinzLinzAustria

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