Abstract: Carbon black and carbon nanotubes were introduced into polybutylene terephthalate resulting in binary composites of PBT/CB and PBT/MWNTs and ternary composite of PBT/CB/MWNTs via melt-blending. The synergistic effect of MWNTs and CB on the properties of the composites was investigated. When adding MWNTs to PBT/CB composites, the percolation threshold for the occurring of conducting network shifted to lower filler contents, resulting in a enhanced conductivity.

Key words: multi-walled carbon nanotube, polybutylene terephthalate, composite, conductive behavior, carbon black