Temperature effects on rigid nano‐silica and soft nano‐rubber toughening in epoxy under impact loading

ABSTRACT The rigid nano‐silica and soft nano‐rubber toughening effects on neat epoxy under impact loading in a range of −50 to 80 °C were investigated. Nanosilica particles (20 nm) toughened neat epoxy at all temperatures with a maximum toughening efficiency at −50 °C and lower efficiency at elevate...

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Bibliographic Details
Published in:Journal of applied polymer science 2017-10, Vol.134 (38), p.n/a
Main Authors: Huang, De‐Dong, Xu, Feng, Du, Xu‐Sheng, Lee, Zheng‐Hang, Wang, Xiao‐Jun
Format: Article
Language:English
Subjects:
Cavitation
Debonding
Deformation
Efficiency
Epoxy resins
Fracture toughness
Impact loads
Impact strength
Materials science
mechanical properties
microscopy
Nanostructure
Particle physics
Polymers
Rubber
Scanning electron microscopy
Silicon dioxide
Temperature effects
thermal properties
Toughening
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Summary:ABSTRACT The rigid nano‐silica and soft nano‐rubber toughening effects on neat epoxy under impact loading in a range of −50 to 80 °C were investigated. Nanosilica particles (20 nm) toughened neat epoxy at all temperatures with a maximum toughening efficiency at −50 °C and lower efficiency at elevated temperatures. In contrast, except at −50 °C, nano‐rubber particles (100 nm) showed the deterioration effect on the impact fracture toughness of epoxy resin. Scanning electron microscopy examinations revealed that the crack pinning and local epoxy deformation induced by rigid particles in term of nano‐silica/epoxy and nano‐rubber/epoxy interfacial debonding (at −50 °C) led to positive toughening efficiency on neat epoxy. However, at 20 and 80 °C, the rubber cavitations/void plastic growth was significantly suppressed under the impact loading, which led to the negative toughening efficiency on epoxy. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45319.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.45319