Abstract Submitted to the NANOTUBE-99 Workshop:

Carbon nanotubes were discovered in 1991 by S. Iijima. The study of these new carbon materials has recently undergone rapid development in this fast moving research area. The deformation micromechanics of single-walled carbon nanotube (SWNT) and multi-walled carbon nanotube (MWNT) particulate nanocomposites have been studied using Raman spectroscopy. SWNT's and MWNT's prepared by two different methods (pulsed laser and arc discharge) have been used as reinforcement for a polymer matrix nanocomposite. A four-point bend test has been employed to deform samples of a dispersion of SWNT and MWNT's in epoxy resin to determine the degree of Raman peak shift with strain. Both SWNT and MWNT's exhibit well-defined Raman peaks. It has been found that for all samples deformed, the Raman peak position chosen shifted to a lower wavenumber upon application of a tensile strain. In addition, it has been found that the Raman spectrum of SWNT's shift to a higher wavenumber when dispersed in ethanol and stays at this higher position even when the solvent is evaporated.

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