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Effects of Cryogenic Temperature on Fracture Toughness of Core-Shell Rubber (CSR) Toughened Epoxy NanocompositesThis study investigated the effects of core-shell rubber (CSR) nanoparticles on the mechanical properties and fracture toughness of an epoxy resin at ambient and liquid nitrogen (LN2) temperatures. Varying amounts of Kane Ace MX130 toughening agent were added to a commercially available EPON 862/Epikure W epoxy resin. Elastic modulus was calculated using quasi-static tensile data. Fracture toughness was evaluated by the resulting breaking energy measured in Charpy impact tests conducted on an instrumented drop tower. The size and distribution of the CSR nanoparticles were characterized using Transmission Electron Microscopy (TEM) and Small Angle X-ray Scattering (SAXS). Scanning Electron Microscopy (SEM) was used to study the fracture surface morphology. The addition of the CSR nanoparticles increased the breaking energy with negligible change in elastic modulus and ultimate tensile stress (UTS). At ambient temperature the breaking energy increased with increasing additions of the CSR nanoparticles, while at LN2 temperatures, it reached a maximum at 5 wt% CSR concentration. KEY WORDS: liquid nitrogen (LN2) properties, fracture toughness, core-shell rubber (CSR).
Document ID
20090014089
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Wang, J.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Cannon, S. A.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Magee, D.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Schneider, J. A.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 24, 2013
Publication Date
September 8, 2008
Subject Category
Composite Materials
Meeting Information
Meeting: Society for the Advancement of Material and Process Engineering (SAMPE) Conference
Location: Memphis, TN
Country: United States
Start Date: September 8, 2008
End Date: September 11, 2008
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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