Characterization of surfactant dispersed single wall nanotube - polystyrene matrix nanocomposite

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Title: Characterization of surfactant dispersed single wall nanotube - polystyrene matrix nanocomposite
Author: Ayewah, Daniel Osagie, Oyinkuro
Abstract: Carbon nanotubes (CNT ) are a new form of carbon with exceptional electrical and mechanical properties . This makes them attractive as inclusions in nanocomposite materials with the potential to provide improvements in electrical and mechanical properties and allows for the creation of a new range of multifunctional materials . In this study single wall carbon nanotubes (SWCNT ) were dispersed in polystyrene using a solution mixing method , with the aid of a surfactant . A good dispersion was achieved and the resulting nanocomposites were characterized for electrical conductivity and mechanical properties by 3 point flexural and fracture toughness tests . Results show a significant improvement in electrical properties with electrical percolation occurring between 0 .1 and 0 .2 wt % . A minor improvement was observed in the flexural modulus but the strength and fracture toughness values in the nanocomposites decreased relative to the neat material . Scanning electron microscopy (SEM ) was performed to characterize the morphology and fracture surface of the specimens . The results of testing and microscopy show that the presence of the nanotubes has an adverse effect on the crazing mechanism in Polystyrene (PS ) resulting in a deterioration of the mechanical properties that depend on this mechanism .
URI: http : / /hdl .handle .net /1969 .1 /ETD -TAMU -1397
Date: 2009-05-15

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Characterization of surfactant dispersed single wall nanotube - polystyrene matrix nanocomposite. Available electronically from http : / /hdl .handle .net /1969 .1 /ETD -TAMU -1397 .

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