Mechanical and Fracture Mechanical Properties of Polymorphous Polypropylene

  • A. Monami
  • B. Langer
  • J. Sadilek
  • J. Kučera
  • W. Grellmann
Part of the Springer Series in Materials Science book series (SSMATERIALS, volume 247)


Polypropylene (PP) is a widely used thermoplastic material and shows a polymorphic behavior. Results of three different types of PP, namely non-nucleated, α- and β-nucleated PP are presented. These materials were prepared under different cooling rates to influence the degree of crystallinity within the materials. The materials resistance against stable crack propagation was described by R-curves. The J d–Δa curves were determined using the instrumented Charpy impact test to apply a higher loading velocity. The results show not only the influence of the cooling rate on the degree of crystallinity but also a correlation between the degree of crystallinity and the materials resistance against stable crack propagation.



The authors thank Prof. H. Roggendorf and Dipl.-Ing. S. Borreck (†) of Martin Luther University Halle-Wittenberg for SEM investigations. We also thank Prof. R. Androsch of Martin Luther University Halle-Wittenberg for polarisation microscopy investigations.


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© Springer International Publishing AG 2017

Authors and Affiliations

  • A. Monami
    • 1
  • B. Langer
    • 2
  • J. Sadilek
    • 3
  • J. Kučera
    • 3
  • W. Grellmann
    • 1
  1. 1.Polymer Service GmbH MerseburgMerseburgGermany
  2. 2.Department of Engineering and Natural SciencesUniversity of Applied Sciences MerseburgMerseburgGermany
  3. 3.Polymer Institute BrnoBrnoCzech Republic

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