POLYPROPYLENE MODIFYING AGENT AND PREPARATION METHOD THEREFOR, POLYPROPYLENE COMPOSITION, AND POLYPROPYLENE MATERIAL AND PREPARATION METHOD THEREFOR

摘要

A polypropylene modifying agent and a preparation method therefor, a polypropylene composition containing said polypropylene modifying agent, and a polypropylene material and a preparation method therefor. The preparation method for the polypropylene modifying agent comprises: bringing the polar monomer graft polypropylene in formulation (1) or formulation (2) into contact with component A for reactive extrusion granulation, and drying; the polar monomer in the polar monomer graft polypropylene can chemically react with component A; in formulation (1), the polar monomer is selected from maleic anhydride, acrylic acid, and acrylate, and component A is selected from polyisocyanate and the like; and in formulation (2), the polar monomer is selected from dimethylamino methacrylate and epoxy acrylate, and component A is selected from polyisocyanate and polyethylene oxide. When introduced into ordinary linear polypropylene, the present polypropylene modifying agent can significantly improve the melt strength and mechanical properties of the polypropylene.