Here, we demonstrate an easy method for the preparation of highly electrically conductive polycarbonate (PC)/multiwalled carbon nanotubes (MWCNTs) nanocomposites in the presence of poly(butylene terephthalate) (PBT). In the presence of MWCNTs, PC and PBT formed a miscible blend, and the MWCNTs in the PC matrix were uniformly and homogeneously dispersed after the melt mixing of the PC and PBT-MWCNT mixture. Finally, when the proportion of the PC and PBT-MWCNT mixture in the blend/MWCNT nanocomposites was changed, an electrical conductivity of 6.87 x 10(-7) S/cm was obtained in the PC/PBT-MWCNT nanocomposites at an MWCNT loading as low as about 0.35 wt %. Transmission electron microscopy revealed a regular and homogeneous dispersion and distribution of the MWCNTs and formed a continuous conductive network pathway of MWCNTs throughout the matrix phase. The storage modulus and thermal stability of the PC were also enhanced by the presence of a small amount of MWCNTs in the nanocomposites. (c) 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013