Strengthening and toughening polypropylene composite and preparation method thereof

Abstract

The invention discloses a strengthening and toughening polypropylene composite, which comprises, by weight, 35 to 94 parts of polypropylene, 0.5 to 5 parts of polyfunctional monomer, 5 to 60 parts of inorganic filler and 0.2 to 4 parts of polypropylene universal antioxidant and processing agent. A preparation method of the strengthening and toughening polypropylene composite includes: mixing all components evenly, adding the components in a screw extruder to perform melt mixing reaction, extruding and prilling to obtain the strengthening and toughening polypropylene composite. In-situ graft reaction occurs in a melt mixing process through double bond of the polyfunctional monomer and polypropylene, simultaneously C=O bond of the polyfunctional monomer and hydroxy on the surface of the filler form hydrogen bond, interfacial interaction between the filler and a matrix is enhanced, thereby achieving high performance of the polypropylene composite. The obtained polypropylene composite not only has good toughness and rigidity, but also can restrain degradation of the polypropylene.

Description

Technical field [0001] The invention is a high -molecular material technology field, which involves a enhanced reinforcement polypropylene complex and its preparation methods. Background technique [0002] Polypropylene is one of the five major plastics and has been widely used in industrial departments such as chemical industry, construction, light industry, automobiles, home appliances, packaging and other industrial departments.However, with the development of the industry, the requirements for material performance are getting higher and higher, and ordinary polypropylene must be modified to give it high performance to meet the needs. [0003] Possessing polypropylene can be achieved through new processing methods and polypropylene mixed modifications.Combining polypropylene and rubber elastic bodies can effectively improve the toughness of the material, but it usually reduces the strength, modulus and heat resistance of the material.Platform filling polypropylene can signific...

AI Technical Summary

Problems solved by technology

This method can improve the mechanical properties of nano-calcium carbonate-filled polypropylene materials, but adding polar functional group grafts will lose the toughness of the material; another example is Chinese patent 98111718. Blend reaction compatibilization method, the method is to uniformly mix polypropylene, blending components, initiators and double bond additives in a certain proportion, carry out melt blending reaction in a screw extruder and extrude to obtain

These methods all have chemical bonds with a material or with the matrix or with the filler, so they have certain limitations in improving the interaction between the interfaces.

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