Microstructure-fracture toughness relationship of short fiber-reinforced pp homopolymer and pp/elastomer blends

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Abstract

Fracture toughness (ko) and J-integral values of short and long glass fibre-reinforced injection-moulded polypropylene homopolymer (PPH) and PP/elastomer blends (PPC) were determined at different testing conditions. The run of the fracture toughness strongly depended on the temperature and crosshead speed and on the composition of the materials. A weak coupling between the fiber and matrix increased the J-integral and thus the energy-related toughness of the composites. This was attributed to an enlargement of the damage zone in the crack tip. Both fracture toughness and J-integral values were discussed upon the microstructural efficiency (M) approach. Fracture and failure maps of the composites were also constructed and discussed.

Original languageEnglish
Pages (from-to)77-108
Number of pages32
JournalJournal of Polymer Engineering
Volume12
Issue number1-2
DOIs
Publication statusPublished - Mar 1993

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Keywords

  • J-integral
  • blends
  • composites
  • coupling
  • fiber-reinforced
  • fracture toughness
  • impact
  • injection-moulding
  • microstructural relation
  • modifier
  • polypropylene

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Polymers and Plastics
  • Materials Chemistry

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