Abstract
ABSTRACTMorphological, thermal, mechanical, and solvent uptake was characterized for neat nylon 6, 6 and functionalized single-walled carbon nanotube/nylon 6, 6. Single-walled carbon nanotubes were functionalized by acid which introduced carboxyl groups on the nanotubes. Scanning electron micrographs of the fractured surfaces of the nanocomposites suggested that the functionalized single-walled carbon nanotubes were dispersed and embedded within the nylon 6, 6 polymer matrix. Polarized optical micrographs showed that the size of spherulites of the nanocomposites decreased, which may be due to nucleation of the carbon nanotubes. Thermogravimetric analysis showed that the stability of the functionalized single-walled carbon nanotubes/nylon 6, 6 nanocomposites was higher by 28–35°C than neat nylon 6, 6. The uptake of solvent by the functionalized single-walled carbon nanotube/nylon 6, 6 was lower than the neat nylon 6, 6, which may be due to the hydrophobic nature of functionalized single-walled carbon nanotubes and their interaction with the polymer.
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