Abstract: The dispersion behavior of nanoparticles in PP power of different size was studied in this paper. The average molecular weight and its distribution of PP were determined using gel permeation chromatography. The specific surface area of different PP power, the dispersion behavior of nano-particles in PP power were characterized using transmission electron microscope. It showed that the size of PP power has an obvious influence on the dispersion behavior of nanoparticles in the matrix, while the viscosity of the polymer has no effect on it.

Key words: dispersion behavior, polypropylene, particle size, nanoparticle