TITLE

Morphological and mechanical properties of carbon-nanotube-reinforced semicrystalline and amorphous polymer composites

AUTHOR(S)
Cadek, M.; Coleman, J. N.; Barron, V.; Hedicke, K.; Blau, W. J.
PUB. DATE
December 2002
SOURCE
Applied Physics Letters;12/30/2002, Vol. 81 Issue 27, p5123
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In this work, multiwalled carbon nanotubes were investigated as potential mechanical reinforcement agents in two hosts, polyvinyl alcohol (PVA) and poly(9-vinyl carbazole) (PVK). It was found that, by adding various concentrations of nanotubes, both Young's modulus and hardness increased by factors of 1.8 and 1.6 at 1 wt % in PVA and 2.8 and 2.0 at 8 wt % in PVK, in reasonable agreement with the Halpin-Tsai theory. Furthermore, the presence of the nanotubes was found to nucleate crystallization of the PVA. This crystal growth is thought to enhance matrix-nanotube stress transfer. In addition, microscopy studies suggest extremely strong interfacial bonding in the PVA-based composite. This is manifested by the fracture of the polymer rather that the polymer-nanotube interface.
ACCESSION #
8737953

 

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