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Multi-walled carbon nanotube; ascorbic acid; mechanical properties; thermal stability; transmission electron microscopy.

Ascorbic acid has been covalently linked to multi-walled carbon nanotubes (MWCNTs). The structures of the functionalized MWCNTs were characterized with Fourier-transform infrared spectroscopy. Thermogravimetric analysis results also demonstrated the presence of organic portions of the functionalized MWCNTs. Polymer composites based on a nanostructured poly(amide–imide) (PAI) were fabricated by an ex situ technique with 5, 10 and 15% loading by weight. Composite films were made by the solvent casting method. The thermal stabilityof the composites increased with even a small amount of modified MWCNT added. Tensile tests were conducted and depicted an increase in the elastic modulus with increasing MWCNTs content. X-ray diffraction study of thecomposites also indicated that the composites incorporated MWCNTs in the polymer chain.

SHADPOUR MALLAKPOUR^{1 2 3} AMIN ZADEHNAZARI¹

1. Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, I. R. Iran
2. Nanotechnology and Advanced Materials Institute, Isfahan University of Technology, Isfahan 84156-83111, I. R. Iran
3. Center of Excellence in Sensors and Green Chemistry, Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, I. R. Iran

Published

15 February 2017

Manuscript received

1 November 2015

Accepted

20 June 2016