The invention discloses a method for preparing a high-toughness halogen-free flame-retardant syndiotactic polystyrene composite material, comprising the following steps in sequence: S1. Prepare the following raw materials by mass parts: 50–80 parts of syndiotactic polystyrene, 10–30 parts of potassium titanate whiskers, 3–5 parts of core-shell toughener, 2–10 parts of phosphazene flame retardant, and 1–10 parts of processing additives; S2. Mix the syndiotactic polystyrene, core-shell toughener, phosphazene flame retardant and processing additives in a rotary mixer in proportion, feed the mixture from the main feeding port of a twin-screw extruder, feed the potassium titanate whiskers from the side feeding port of the extruder via a feeder, and conduct melt blending, extrusion and pelletization; S3. In the rotary mixer in Step S2, set the rotation speed at 60–120 rpm and mixing time at 5–10 min. The invention adopts a high-efficiency halogen-free phosphazene flame retardant which is environmentally friendly, with low loading and slight influence on material physical properties. Besides, the flame retardant is light in color and will not affect material coloring compared with red phosphorus.
Area Code: CN
Application Number: CN202411416535.7
