The invention relates to the technical field of
polypropylene, and discloses a high-strength
polypropylene composite material as well as a preparation method and application thereof in an automobile bumper. The high-strength
polypropylene composite material comprises the following components in parts by weight: 70-90 parts of polypropylene resin, 10-30 parts of
polycarbonate resin, 25-40 parts of glass fibers, 3-10 parts of an allyl
carbonate grafted polypropylene compatilizer and the like. The compatilizer contains
carbonate groups similar to
polycarbonate, so that the compatibility between polypropylene resin and
polycarbonate resin is improved, and the compatilizer has higher mechanical properties. Moreover, the compatilizer contains carboxyl and can form interaction with the surface of the
glass fiber, so that the compatibility between the
glass fiber and the polypropylene resin is improved, the
glass fiber has a better reinforcing effect, the tensile strength, the
impact strength and the bending strength of the
composite material are remarkably improved, and the compatilizer has good practical application in the aspects of automobile bumpers and the like.