Fracture behavior of boehmite-filled polypropylene block copolymer nanocomposites as assessed by the essential work of fracture concept

Tamás Turcsán, László Mészáros, Vincent Mandla Khumalo, Ralf Thomann, József Karger-Kocsis

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The essential work of fracture (EWF) method was adapted to determine the fracture toughness of poly(propylene-block-ethylene) (EPBC) based nanocomposites with different amounts (from 0 up to 5 wt %) of synthetic boehmite alumina (BA). The dispersion of BA in the matrix was studied by transmission and scanning electron microscopies. Agglomerated micronscale along with well dispersed nanoscale BA particles were present in the EPBC matrix. By contrast to the neat EPBC, all nanocomposites failed by unstable necking. Therefore the energy partitioning concept of the EWF was adapted and attention paid to the yielding-related term. Both specific yielding-related essential and nonessential work of fracture parameters increased linearly with the product of the yield stress and elongation at yield derived from static tensile tests.

Original languageEnglish
Article number40447
JournalJournal of Applied Polymer Science
Volume131
Issue number13
DOIs
Publication statusPublished - Jul 5 2014

Keywords

  • composites
  • properties and characterization
  • structure-property relations
  • thermoplastics

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

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