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Fracture behavior dependence on load-bearing capacity of filler in nano- and microcomposites of polypropylene containing calcium carbonate

Afshar, A ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1016/j.matdes.2009.07.054
  3. Publisher: 2010
  4. Abstract:
  5. The fracture toughness and deformation mechanism of PP/CaCO3 (15 wt.%) composites were studied and related to load-bearing capacity of the particles. To alter the load-bearing capacity of the particles, different particle sizes (0.07-7 μm) with or without stearic acid coating were incorporated. The fracture toughness of the composites was determined using J-Integral method and the deformation mechanism was studied by transmission optical microscopy of the crack tip damage zone. It was observed that the load-bearing capacity of the particles decreased by reduction of particle size and application of coating. A linear relationship between normalized fracture toughness and inverse of load-bearing capacity of particles was found. The crack tip damage zone in composites, which consists in massive crazing, further grows by reduction in load-bearing capacity
  6. Keywords:
  7. A. Polymer matrix composite ; Calcium carbonate ; Damage zones ; Deformation mechanism ; E. Deformation and fracture ; Fracture behavior ; J-integral method ; Linear relationships ; Load-bearing capacity ; Micro-composites ; Bearings (structural) ; Calcium ; Crack tips ; Deformation ; Fracture toughness ; Light transmission ; Optical microscopy ; Particle size ; Plastic coatings ; Polymer matrix composites ; Stearic acid ; Welds ; Bearing capacity
  8. Source: Materials and Design ; Volume 31, Issue 2 , 2010 , Pages 802-807 ; 02641275 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0261306909004051