With the waste polypropylene (WPP) as matrix and the modificated non-metallic powder from waste printed circuit boards (NWPCB) as filler

the WPP/NWPCB composites were prepared by means of the melt blending. To enhance the mechanical characters

the WPP/NWPCB composites were synergistically modified by ethylene octene copolymer (POE) and maleic anhydride grafted polypropylene (PP-g-MAH). The mechanical properties and morphology analysis showed that POE greatly improved the impact strength of WPP/NWPCB composite materials. When the content of POE was 15 g·(100 g)-1

the impact strength of WPP/NWPCB composites was increased by 129%. The interface bonding strength between filler and matrix was improved with modification by 9 g·(100 g)-1 PP-g-MAH. The impact strength

tensile strength and flexural strength were increased by 7.8%

23.4% and 20% respectively. The pyrolysis characteristics of WPP/NWPCB/POE composite materials were investigated by means of TGA-FTIR at nitrogen atmosphere. It indicated that the heat stability of WPP material in the composites was improved by the addition of NWPCB. The alkanes

olefins and CO2 were released during the pyrolysis process of WPP/NWPCB composites

whereas a small amount of harmful gas such as phenol aromatic compounds and hydrogen bromide was also produced.