Polyamide 6/graphite nanocomposites

Polyamide 6/graphite nanocomposites with markedly low percolation threshold value were recently prepared using an in-situ polycondensation approach. Based on transmission electron microscopy (TEM) results, the thickness of EG filler incorporated in the polymer matrices was found to vary from 10 to 50 nm, and the aspect ratios (diameter to thickness) can be estimated as high as 100-300. The graphite used by Pan et al. is termed foliated graphite (FG). FG can... 

The polyamide 6/graphite nanocomposites were prepared via anionie ringopening polymerization. Eirst, the mixture of a given amount of e-eaprolactam and EG powder sealed in a tube was immersed in an ultrasonie bath at 110"C for 25 min to disperse of the mixture. Then, a eatalytie amount of sodium hydroxide was introduced into the mixture as activator, followed by vaeuuming the system... 

Polyamide/graphite nanocomposites can also be prepared by melt processing. If there is no acid present, a slight increase in thermal and mechanical properties is observed, while those containing acid show no change in thermal stability but a decrease in mechanical properties. 

Uhla, F.M., Yaoa, Q., Nakajimac, H., Maniasc, E., Wilkie, C.A., 2005. Expandable graphite/ polyamide-6 nanocomposites. Polymer Degradation and Stahihty 89, 70—84. 

Fawn M U, Yao Q, Hiroyoshi N, Manias E, Wilkie C A (2005), Expandable graphite/polyamide 6 nanocomposites . Polymer Degradation and Stability, 89, 70-84. 

Liu, Y., Chen, Z., Yang, G., 2011. Synthesis and characterization of polyamide-6/graphite oxide nanocomposites. Journal of Materials Science 46, 882—888. 

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