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Sorption and diffusion of supercritical carbon dioxide (scCO 2 ) into polycarbonate (PC) nanocomposites loaded with 0, 1 and 2 wt% of multi-walled carbon nanotubes (MWNTs) have been investigated. After determination of the saturation equilibrium, the samples have been saturated with scCO 2 to ensure a partial foaming with a density gradient from the surface to the center of the samples...
Supercritical carbon dioxide readily induced foaming of various polymers. In that context, supercritical CO 2 was applied to carbon nanotubes based polycarbonate nanocomposites to ensure their foaming. Surprisingly, efficient foaming only occurs when low pressure is applied while at high pressure, no expansion of the samples was observed. This is related to the ability of supercritical carbon...
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