▎ 摘　　要

Isotactic polypropylene (iPP), silver-rich shell CuAg nanoalloys and graphene nanoplatelets (GNPs) were used to prepare thermally conductive binary (iPP/CuAg and iPP/GNPs) and ternary (iPP/CuAg/GNPs) nanocomposites with filler compositions from 0.1 to 5 wt.% through melt processing. All nanocomposites were thermally and electrically characterized. Results showed that both nanoparticles nucleate the crystallization of iPP, shifting the crystallization transition toward higher temperature as compared with that of iPP. The nanoparticles dispersion was not optimum but was enough to make the nanocomposites thermally conductive between 0.65 and 1.56 W m(-1) K-1 and more thermally stable (443 degrees C) than neat iPP (347 degrees C). For the iPP/CuAg nanocomposites, the increase in the electrical conductivity from 10(-15) to 10(-3) S m(-1) suggests the formation of a percolated network. In contrast, for iPP/GNPs nanocomposites, no improvement in this property was observed. Finally, for iPP/CuAg/GNPs nanocomposites, the measured electrical conductivity (10(-15) S m(-1)) suggests that the polymer-GNP interface is acting as a charge carrier trap. This effect is commonly reported in binary nanocomposites but little or no data exists for ternary NCs.