Fracture Behavior of Covalently Re-Modified MWNT/Epoxy Nanocomposites

In this work, a surface re‐modified multi‐walled carbon nanotube (MWNT) was prepared by the chemical attachment of oligomeric unsaturated polyester on the MWNT surface. The re‐modified MWNT was incorporated in two concentrations of 0.35 and 0.70 Wt.% into epoxy resin in order to investigate its effe...

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Bibliographic Details
Published in:Macromolecular symposia. 2010-11, Vol.297 (1), p.219-224
Main Authors: Kaffashi, Babak, Kaveh, Amir
Format: Article
Language:English
Subjects:
Attachment
carbon nano tubes (CNT)
Covalence
Dispersions
Fracture mechanics
Fracturing
mechanical properties
Morphology
Multi wall carbon nanotubes
multiwalled carbon nanotubes (MWNT)
Nanocomposites
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Summary:In this work, a surface re‐modified multi‐walled carbon nanotube (MWNT) was prepared by the chemical attachment of oligomeric unsaturated polyester on the MWNT surface. The re‐modified MWNT was incorporated in two concentrations of 0.35 and 0.70 Wt.% into epoxy resin in order to investigate its effect on morphology and mechanical behavior of the MWNT/epoxy nanocomposite. The transmission electron microscopy showed that the re‐modification of MWNT surface improves its dispersion state in the epoxy matrix. The tensile measurements for the nanocomposite having different amounts of surface re‐modified/not‐modified MWNT showed that the fracture mechanism changed from brittle to tough beyond a certain amount of surface re‐modified MWNT. The scanning electron microscopy findings on the fracture surface morphology of the resulted nanocomposite substantiated the observed phenomena.
ISSN:1022-1360
1521-3900
1521-3900
DOI:10.1002/masy.200900156