Journal
POLYMER
Volume 48, Issue 20, Pages 6086-6096Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2007.07.070
Keywords
aspect ratio; flammability; nanocomposites
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The effects of the aspect ratio of multi-walled carbon nanotubes (MWNTs) on the rheology and flammability of polystyrene/MWNT nano-composites are studied using two MWNTs having average aspect ratios (length to outer diameter) of 49 and 150. Dynamic theological experiments show that the particles with the larger aspect ratio impart much higher storage moduli and complex viscosities to the nanocomposites compared to equivalent mass loadings of particles with the smaller aspect ratio. Additionally, in flammability experiments, the larger aspect ratio particles lead to a greater reduction in mass loss rate, i.e., they are more effective at reducing flammability. These results demonstrate that the aspect ratio of MWNTs is a key parameter in controlling the rheology and flammability of polymer nanocomposites. Published by Elsevier Ltd.
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