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Mechanical and Fracture Mechanical Properties of Polymorphous Polypropylene

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

Abstract

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.

Notes

Acknowledgements

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.

References

  1. 1.
    Grellmann, W., Langer, B., Bierögel, C., Schoßig, M., Mecklenburg, T.: Bruchmechanische Zähigkeitsbewertung nukleierter glasfaserverstärkter Polyolefinwerkstoffe. In: Pohl, M. (eds.) Konstruktion, Qualitätssicherung und Schadensanalyse. Verlag Werkstoff-Informationsgesellschaft, Frankfurt (2004), pp. 327–332Google Scholar
  2. 2.
    Monami, A.: Struktur, Exfolierungszustand und Eigenschaften von PA6/OMMT-Verbund-werkstoffen. Mensch und Buch Verlag, Berlin (2013)Google Scholar
  3. 3.
    Monami, A., Langer, B., Sadilek, J., Kučera, J., Grellmann, W.: Fracture mechanics properties of polymorphic polypropylene. Procedia Mater. Sci. 3, 276–281 (2014)CrossRefGoogle Scholar
  4. 4.
    Phillips, R.A., Wolkowitz, M.D.: Structure and morphology. In: Moore, E.P. (ed.) Polypropylene Handbook, pp. 113–118. Carl Hanser, Munich Vienna New York (1996)Google Scholar
  5. 5.
    Chiu, F.-C., Lai, S.-M., Chen, J.-W., Chu, P.-H.: Combined effects of clay modifications and compatibilizers on the formation and physical properties of melt-mixed polypropylene/clay nanocomposites. J. Polym. Sci., Part B: Polym. Phys. 42, 4139–4150 (2004)CrossRefGoogle Scholar
  6. 6.
    Maier, C., Calafut, T.: Polypropylene—The Definitive User´s Guide and Databook. William Andrew Publishing/Plastics Design Library (1998)Google Scholar
  7. 7.
    Foresta, T., Piccarolo, S., Goldbeck-Wood, G.: Competition between α and γ phases in isotactic polypropylene: effects of ethylene content and nucleating agents at different cooling rates. Polymer 42, 1167–1176 (2001)CrossRefGoogle Scholar
  8. 8.
    Marigo, A., Causin, V., Marega, C., Ferrari, P.: Crystallization of the gamma form in random propylene–ethylene copolymers. Polym. Int. 53, 2001–2008 (2004)CrossRefGoogle Scholar
  9. 9.
    Marigo, A., Marega, C., Causin, V., Ferrari, P.: Influence of thermal treatments, molecular weight, and molecular weight distribution on the crystallization of beta-isotactic polypropylene. J. Appl. Polym. Sci. 91, 1008–1012 (2004)CrossRefGoogle Scholar
  10. 10.
    Karger-Kocsis, J., Varga, J., Ehrenstein, G.W.: Comparison of the fracture and failure behavior of injection-molded α- and β-polypropylene in high-speed three-point bending tests. J. Appl. Polym. Sci. 64, 2057–2066 (1997)CrossRefGoogle Scholar
  11. 11.
    Wang, C., Zhang, Z., Ding, Q., Jiang, J., Li, G., Mai, K.: β-crystallization of isotactic polypropylene in the presence of β-nucleating agent and different crystallinity poly(ethylene terephthalate). Thermochimica Acta 559, 17–22 (2013)CrossRefGoogle Scholar
  12. 12.
    Raab, M., Kotek, J., Baldrian, J., Grellmann, W.: Supermolecular structure and mechanical behaviour of polymers. In: Grellmann, W., Seidler, S. (eds.) Deformation and Fracture Behaviour of Polymers, pp. 153–160. Springer, Berlin (2001)CrossRefGoogle Scholar
  13. 13.
    Kotek, J., Raab, M., Baldrian, J., Grellmann, W.: The effect of specific β-nucleation on morphology and mechanical behavior of isotactic polypropylene. J. Appl. Polym. Sci. 85, 1174–1184 (2002)CrossRefGoogle Scholar
  14. 14.
    Aboulfaraj, M., G’Sell, C., Ulrich, B., Dahoun, A.: In situ observation of the plastic deformation of polypropylene spherulites under uniaxial tension and simple shear in the scanning electron microscope. Polymer 36, 731–742 (1995)CrossRefGoogle Scholar
  15. 15.
    Karger-Kocsis, J.: How does “phase transformation toughening” work in semicrystalline polymers? Polym. Eng. Sci. 36, 203–210 (1996)CrossRefGoogle Scholar
  16. 16.
    Langer, B., Bierögel, C., Grellmann, W.: Eigenschaften von Polypropylen gezielt bewerten. Kunststoffe 5, 87–97 (2008)Google Scholar
  17. 17.
    Ton-That, M.T., Leelapornpisit, W., Utracki, L., Perrin-Sarazin, F., Denault, J., Cole, K., Bureau, M.: Effect of crystallization on intercalation of clay-polyolefin nanocomposites and their performance. Polym. Eng. Sci. 46, 1085–1093 (2006)CrossRefGoogle Scholar
  18. 18.
    Grellmann, W., Seidler, S., Hesse, W.: Testing of plastics—Instrumented Charpy impact test; Procedure for determining the crack resistance behaviour using the instrumented Charpy impact test; Part 1: Determination of characteristic fracture mechanics parameters for resistance against unstable crack propagation; Part II: Determination of characteristic fracture mechanics parameters for resistance against stable crack propagation (2014)Google Scholar
  19. 19.
    Grellmann, W., Seidler, S. (eds.): Polymer Testing. Carl Hanser, Munich (2013)Google Scholar
  20. 20.
    Grellmann, W., Bierögel, C., Reincke, K.: Lexikon Kunststoffprüfung und Diagnostik. Merseburg. see: http://wiki.polymerservice-merseburg.de (2014)

Copyright information

© 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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