Polypropylene Modification

Polypropylene modificationrefers to adding other fillers in polypropylene, such as plastics, organic materials, inorganic materials or some additives. Finally, polypropylene materials with excellent properties are prepared by mixing and kneading methods, which can be divided into filler modification, Strengthening modification, toughening modification and blending modification.

The filler modification method was used, polypropylene was used as the matrix resin, and non-metal powder was used as the filler. The mechanical properties and flame retardancy of the composites were studied. The addition of silane coupling agent (KH550) or maleic anhydride grafted polypropylene (MAPP) improved The interface compatibility of composite materials and the improvement of mechanical properties, MAPP can effectively improve the interface compatibility of composite materials. Natural fibers and PP-g-MA are used to improve the mechanical properties of RPP, where PP-g-MA is used as a compatibilizer. The results show that the tensile strength of RPP increases with the increase of natural fiber content within a certain range. When the content reaches 40%, the tensile strength is the best. In addition, after adding natural fiber, the thermal deformation temperature of RPP increases. And the modulus value is also improved.

The research on the modification technology of polypropylene plastics is of great significance. Researchers at home and abroad have conducted a lot of research on the aging mechanism and modification of automotive polypropylene plastics, providing important theoretical guidance for the modification of polypropylene plastics. However, there are few studies on the rheological properties and injection molding processes of polypropylene, which limits the efficient use of polypropylene. According to the actual investigation, in order to use the raw material resources reasonably, it is necessary to deeply study the influence law and mechanism of polypropylene injection molding process.