Premium
Fracture Behavior of Covalently Re‐Modified MWNT/Epoxy Nanocomposites
Author(s) -
Kaffashi Babak,
Kaveh Amir
Publication year - 2010
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200900156
Subject(s) - materials science , nanocomposite , epoxy , composite material , carbon nanotube , scanning electron microscope , ultimate tensile strength , surface modification , transmission electron microscopy , morphology (biology) , polyester , dispersion (optics) , brittleness , chemical engineering , nanotechnology , physics , optics , biology , engineering , genetics
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.