Thermal conductivity of polypropylene filled with inorganic particles

► Better thermal conductivity in PP samples filled with h-BN. ► Filler particle size affect composite thermal conductivity. ► Thermal conductivity was measured for different filler amount. Boron and aluminium nitride, as well as carbon materials, were used as fillers for polypropylene to increase its thermal conductivity. Better thermal conductivity was observed for samples filled with nanosized BN. All composites show thermal stability up to 250°C. Filling of polypropylene was shown to affect crystallinity degree, adding of BN and carbon nanotubes results in the increase in crystallinity of polypropylene. It was observed that BN forms chemical bonds with polymer matrix, whereas no evidence of such bonds was found in case of polypropylene filled with AlN particles.