Micromechanical mechanisms for toughness enhancement in β-modified polypropylene

Sven Henning, Rameshwar Adhikari, Georg H. Michler, Francisco J. Baltá Calleja, József Karger-Kocsis

Research output: Contribution to journalArticle

46 Citations (Scopus)


Two samples of isotactic polypropylene (iPP) representing the crystalline α- and β- modifications are compared with regard to their semicrystalline morphology and the resulting micromechanical mechanisms. Processes at room temperature (23°C) and at -40°C have been investigated by means of different microscopic techniques. Good results can be achieved by the application of a chemical etching technique to the deformed samples prior to scanning electron microscopy inspection. The toughness enhancement that is measured for the β-iPP is attributed to micromechanical mechanisms initiated within the intercrystalline, amorphous phase. It is shown that the specific nanostructure (lamellar arrangement) causes significant changes in the mechanical behaviour of the materials.

Original languageEnglish
Pages (from-to)157-172
Number of pages16
JournalMacromolecular Symposia
Publication statusPublished - Aug 2004


  • Deformation behaviour
  • Electron microscopy
  • Microhardness
  • Nanostructure
  • Polypropylene
  • Semicrystalline polymers

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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