Essential work of fracture and failure mechanisms of polypropylene–clay nanocomposites

Download
  1. (PDF, 784 KB)
  2. Get@NRC: Essential work of fracture and failure mechanisms of polypropylene–clay nanocomposites (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1016/j.engfracmech.2006.04.012
AuthorSearch for: ; Search for: ; Search for:
TypeArticle
Journal titleEngineering Fracture Mechanics
Volume73
Issue16
Pages23602374; # of pages: 15
SubjectPolypropylene nanocomposites; Microstructure; Essential work of fracture; Toughness; Fractography
AbstractThe fracture behavior of polymer nanocomposites (PNCs) based on a polypropylene with organo-modified clays (2 wt.%) and different coupling agents was studied by means of essential work of fracture (EWF). The PNC microstructure was characterized by clay particle dispersion at the micron scale (>1 µm) and sub-micron scale (200 nm to 1 lm), with good intercalation and partial exfoliation (<100 nm). Tensile testing showed significant improvements (+25–50%) corresponding to nanoparticle reinforcement effects. Fracture surfaces revealed that fracture occurred by void initiation at larger clay particles, followed by void growth and coalescence as the surrounding matrix stretched into ligaments. EWF improvements (+20%) were noted for PNCs that had fewer micron scale particles and showed higher tensile improvements. Toughness improvements were attributed to higher voiding stresses and improved matrix resistance attributed to finer, more oriented clay nanoparticles.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Industrial Materials Institute
Peer reviewedYes
NRC number48935
NPARC number15884120
Export citationExport as RIS
Report a correctionReport a correction
Record identifier6724948c-ceb3-4c43-8fc1-ec1e438766fa
Record created2010-07-30
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)