The present invention relates to a fiber-reinforced polypropylene composite material and its preparation method.
The preparation method comprises the following steps: immersing polypropylene injection molding material in a silane coupling agent solution, stirring to modify it, and obtaining a first component; In polyester bottle flakes, add ethylene glycol and trimer monomers for alcoholysis, then add 5-(2-pyridyl)isophthalic acid, isophthalic acid, and nicotinic acid metal salts for reaction to obtain a second component;
Adding polyether and lignin-acrylamide-styrene graft copolymer to the mixture of the first and second components to react, yielding a reaction solution;
Mixing the reaction solution with additives uniformly, then extruding and pelletizing via a twin-screw extruder to obtain fiber-reinforced polypropylene composite material.
The preparation method of the present invention recovers polypropylene injection molding waste and polyester bottle flakes, and optimizes the process to reduce the interfacial bonding force between polyester fibers and the polypropylene matrix.
The resulting fiber-reinforced polypropylene composite exhibits superior mechanical properties.
Country Code: CN
Application Number: CN202211564054.1
