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Anomalous fracture behavior in an epoxy-based hybrid composite

Marouf, B. T ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. DOI: 10.1016/j.msea.2009.03.028
  3. Publisher: 2009
  4. Abstract:
  5. In this investigation, core-shell rubber particles and organically modified clay were added to an epoxy resin and the changes in mechanical behavior were studied. As expected, the yield strength of the organoclay-filled epoxies increased modestly with increasing clay content and the yield strength of the rubber-modified compounds decreased with rubber content. Interestingly, the compressive yield strength of epoxy resins containing both rubber particles and organoclay (a.k.a. hybrid nanocomposites) was found to be independent on organoclay content (up to 5 phr). The fracture toughness of organoclay-filled epoxies increased modestly with clay content and, as expected, the increases in fracture toughness were greater for the rubber-modified epoxies. Surprisingly, the addition of nanoclay to the rubber-toughened epoxy resulted in a significant decrease in fracture toughness. © 2009 Elsevier B.V. All rights reserved
  6. Keywords:
  7. Core-shell rubber particles ; Fracture ; Intercalated clay ; Clay contents ; Epoxy ; Fracture behaviors ; Hybrid composites ; Hybrid nanocomposites ; Intercalated clay ; Mechanical behaviors ; Modified clays ; Modified epoxies ; Nano clays ; Organoclay contents ; Rubber contents ; Rubber particles ; Rubber-toughened ; Yield strengths ; Clay minerals ; Compressive strength ; Epoxy resins ; Nanocomposites ; Organoclay ; Resins ; Rubber ; Yield stress ; Fracture toughness
  8. Source: Materials Science and Engineering A ; Volume 515, Issue 1-2 , 2009 , Pages 49-58 ; 09215093 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0921509309003529