Preparation Process of Long Fiber Reinforced Impact Polypropylene Copolymer Composites

Abstract

Composites of continuous glass fiber reinforced impact polypropylene copolymer (IPC) were prepared by using a cross-head impregnation mold by a self-designed die fixed on a single screw extruder, and were chopped into Long fiber/IPC pellets approximately 12 mm in length. The effect of preheat temperature and pulling speed on the mechanical properties of the composites were studied and micrographs of fracture surface of impact specimens for the composites were investigated by scanning electron microscope (SEM). Mechanical properties of the composites were best at 200 °C of the preheated temperature, for the better interfacial adhesion between glass and matrix resin, and that proved by the SEM. Meanwhile, mechanical properties of the composites decreasing with the increasing of pulling speed, for the impregnation effect degraded.