关键词: 废电路板, 玻璃纤维, 聚丙烯, 力学性能

Abstract: Polypropylene matrix composites (PPMC) filled with recycled fiberglass powder (RFGP) from waste printed circuit boards (WPCB) were prepared by melt blending method in this research. The effects of surface modification，size fraction and content of the RFGP on the mechanical properties of the PPMC were investigated based on the results of mechanical properties and impact fracture surface morphologies of the PPMC. The results indicated that the mechanical properties of the PPMC can be significantly improved by adding the RFGP pretreated with KH-550 silane as a coupling reagent into polypropylene. And the PPMC with coarse fraction of the RFGP showed better mechanical properties than PPMC with fine fraction. Moreover，the increment of mechanical properties of the PPMC increased with the increase of RFGP content in the beginning and then decreased. When the modified RFGP content was 30% and the size fraction was 180—450 μm，the maximum increment of flexural modulus，flexural strength，tensile strength and impact strength of the PPMC was 68.4%，31.2%，25.9% and 41.4%，respectively.

Key words: waste printed circuit boards, fiberglass, polypropylene, mechanical property