Abstract
The deformation micromechanics of single-walled carbon nanotube (SWNT) particulate nanocomposites has been studied using Raman spectroscopy. SWNTs prepared by two different methods (pulse-laser and arc-discharge) have been used as reinforcement for a polymer matrix nanocomposite. The carbon nanotubes exhibit well-defined Raman peaks and Raman spectroscopy has been used to follow their deformation. It has been found that for all nanocomposite samples deformed, the G' Raman band shifted to a lower wavenumber upon application of a tensile stress indicating stress transfer from the matrix to the nanotubes and hence reinforcement by the nanotubes. The behavior has been compared with that of high-modulus carbon fibers and has been modeled using orientation factors suggested initially by Cox. In this way it has been possible to demonstrate that the effective modulus of SWNTs dispersed in a composite could be up to 1 TPa.© (2000) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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