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Fracture toughness of a hybrid rubber modified epoxy. II. Effect of loading rate

Abadyan, M ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1002/app.35379
  3. Publisher: Wiley , 2012
  4. Abstract:
  5. Effect of loading rate on toughness characteristics of hybrid rubber-modified epoxy was investigated. Epoxy was modified by amine-terminated butadiene acrylonitrile (ATBN) and recycled tire. Samples were tested at various loading rates of 1-1000 mm/min. Fracture toughness measurements revealed synergistic toughening in hybrid system at low loading rates (1-10 mm/min); hybrid system exhibited higher fracture toughness value in comparison with the ATBN-modified resin with same modifier content. However, synergistic toughening was eliminated by increasing the loading rate. At higher loading rates (10-1000), the fracture toughness of hybrid system decreased gradually to the level lower than that of ATBN-modified epoxy. Fractography of the damage zones showed the toughening mechanisms of ATBN-modified system was less affected by increasing the loading rate compared to that of hybrid system
  6. Keywords:
  7. Damage zones ; Fracture toughness measurements ; Fracture toughness values ; Hybrid compounds ; Loading rate ; Low loading ; Modified epoxy ; Rubber toughening ; Toughening mechanisms ; Butadiene ; Epoxy resins ; Fractography ; Fracture mechanics ; Fracture toughness ; Hybrid systems ; Resins ; Rubber ; Loading
  8. Source: Journal of Applied Polymer Science ; Volume 125, Issue 3 , January , 2012 , Pages 2476-2483 ; 00218995 (ISSN)
  9. URL: http://onlinelibrary.wiley.com/doi/10.1002/app.35379/abstract