Abstract: The polyimide/nanometer carbon black composites were prepared by in situ polymerization. The influence of the volume fraction of nanometer carbon black on the degree of imidization and mechanical and tribological properties of the composites were studied using fourier transform infrared spectrometer, universal testing machine, and friction and wear tester. It was found that a moderate amount of the addition of nanometer carbon black could improve the tribological properties and mechanical properties. When the content of nanometer carbon black was 28%, the material gave excellent tribological properties, the surface of the composite was very smooth.

Key words: polyimide, nanometer carbon black, particle size, tribological behavior