High-CTI (comparative tracking index) polyphenylene sulfide composite material and preparation method thereof

The invention discloses a high-CTI polyphenylene sulfide composite material and a preparation method thereof, and belongs to the technical field of composite materials. The composite material comprises the following raw materials: 20-40 parts of PPS resin, 20-65 parts of modified magnesium hydroxide, 1-15 parts of a modified flexibilizer, 0.1-1 part of a lubricant, 0.1-1 part of carbon black and 20-40 parts of short glass fiber. The preparation method comprises the following steps: mixing the PPS resin and the modified toughening agent to obtain a premix; adding modified magnesium hydroxide, a lubricant and carbon black into the premix, and mixing to obtain a mixture; the mixture is discharged from a main feeding weightlessness scale, and the short glass fibers are discharged from a side feeding weightlessness scale; placing the short glass fibers and the mixture in a double-screw extruder for high-temperature melt extrusion, cooling through a water tank, and granulating through a granulator to obtain polyphe