On the toughness response of iPP and sPP/MWNT nanocomposites

D. E. Mouzakis, G. C. Papanicolaou, K. Giannadakis, I. Zuburtikudis

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Nanocomposites based in polypropylene (both syndiotactic and isotactic) and multiwall carbon nanotubes (MWNTs) directly blended in the melt via micro-extrusion, were studied. The aim was to determine the role of MWNTs, on the creation of the plastic zone and crack propagation in double-cracked tensile specimens. Essential work of fracture toughness testing was performed on these nanocomposites. In all cases, the effect of MWNT weight fraction on the above properties was extensively studied. Data obtained have shown a non-linear relationship of almost all properties with MWNTs content. Scanning electron microscopy revealed that a micro crack/craze bridging mechanism can be detected in polymer matrix/ MWNT nanocomposites. This mechanism was observed in the fibrillated areas of the specimens' fractured surfaces. The results obtained showed a promising role of the nanotubes as tougheners for future nanocomposites' applications. Ductile-to-brittle transition was confirmed for MWNT contents above 1 wt%.

Original languageEnglish
Pages (from-to)348-353
Number of pages6
JournalStrain
Volume49
Issue number4
DOIs
Publication statusPublished - Aug 2013

Keywords

  • essential work of fracture
  • isotactic
  • multiwall carbon nanotubes
  • polypropylene
  • syndiotactic

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering

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