Effect of amino functionalized MWCNT on the crosslink density, fracture toughness of epoxy and mechanical properties of carbon-epoxy composites

I, Srikanth and Kumar, Suresh and Kumar, Anil and Ghosal, P and Ch, Subrahmanyam (2012) Effect of amino functionalized MWCNT on the crosslink density, fracture toughness of epoxy and mechanical properties of carbon-epoxy composites. Composites Part A: Applied Science and Manufacturing, 43 (11). pp. 2083-2086. ISSN 1359-835X

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Abstract

Amino functionalized multiwalled carbon nanotubes (A-MWCNTs) reinforced two phase (A-MWNT-epoxy) and three phase (A-MWCNTs-carbon fiber-epoxy) nanocomposites were fabricated with 0.25 wt%, 0.5 wt% and 1.0 wt% loadings of A-MWCNTs. It is observed that, A-MWCNTs can improve the crosslink density of epoxy significantly. Fracture toughness of epoxy matrix is found to increase up to an optimum crosslink density improvement, indicating the role of crosslink density in imparting toughness to epoxy apart from the crack deflection contributions of A-MWCNTs. In addition to that, this study infers that, tensile, flexural properties of the three phase composites are strongly influenced by the fracture toughness changes of the matrices. This study, thus proposes additional mechanisms of toughness enhancements for two phase and mechanical properties enhancements for three phase composites imparted by A-MWCNTs.

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IITH Creators:
IITH CreatorsORCiD
Ch, SubrahmanyamUNSPECIFIED
Item Type: Article
Additional Information: Authors are thankful to Dr. S.P. Gokhale, of NCL, Pune, India for helping in amino functionalisation of MWCNTs. Authors also thank Dr. Balashanmugam and Mr. Ankit of CMTI, Bangalore for FESEM analysis of the composites.
Uncontrolled Keywords: A. Carbon nanotubes; A. Polymer-matrix composites (PMCs); B. Fiber/matrix bond; B. Fracture toughness; Carbon-epoxy composite; Crack deflections; Cross-link densities; Epoxy matrices; Fiber/matrix bonds; Flexural properties; Functionalized multi-walled carbon nanotubes; Functionalized-MWCNT; Polymermatrix composites (PMCs); Three phase; Three-phase composites; Toughness enhancement; Two phase
Subjects: ?? sub5.8 ??
Divisions: Department of Chemistry
Depositing User: Team Library
Date Deposited: 31 Oct 2014 09:50
Last Modified: 16 Apr 2015 06:08
URI: http://raiith.iith.ac.in/id/eprint/592
Publisher URL: http://dx.doi.org/10.1016/j.compositesa.2012.07.00...
OA policy: http://www.sherpa.ac.uk/romeo/issn/1359-835X/
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