A kind of polypropylene-based composite material and preparation method thereof

Abstract

The invention discloses a polypropylene-based composite material and a preparation method thereof. The polypropylene-based composite material is composed of the following materials, based on 100 parts by weight of polypropylene, 10-100 parts of polyamide, functionalized polypropylene 2~30 parts of compatibilizer, 0.5~5 parts of lubricant, 0.5~5 parts of plasticizer, 0.01~1 part of stabilizer. The addition of the new functional polypropylene compatibilizer can promote the mutual mixing of polypropylene and polyamide, and the compatibilization effect is obvious. The synthesis of functional polypropylene compatibilizer can keep the original shape of polypropylene powder and reduce the The steps of subsequent material reprocessing and molding, the adjustment of the temperature of each heating section and the rotation speed of the screw during the blending and extrusion of polypropylene-based composite materials can greatly promote the dispersion of functional polypropylene compatibilizers in polypropylene and polyamide , so as to well demonstrate the compatibilizing effect of the functionalized polypropylene compatibilizer, the preparation process is simple and convenient, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a polypropylene-based composite material and a preparation method thereof, belonging to the field of polymer material modification technology and application. Background technique [0002] Polypropylene (PP) has a simple synthesis method, low price, light weight, low water absorption, outstanding stress crack resistance, wear resistance, and easy processing and molding. It is a general-purpose plastic that is widely used. However, polypropylene products have poor weather resistance, high static electricity, poor dyeability, printability and adhesion, low low-temperature impact strength, and poor creep resistance. [0003] Combining PP with other plastics or inorganic fillers can effectively improve its performance and expand the application range of polypropylene products. However, since PP is a non-polar polymer, there is always the problem of poor compatibility when PP is compounded with other materials. Adding a compatibili...

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Problems solved by technology

However, this method needs to use styrene as the second grafting monomer and polyfunctional esters as the third grafting monomer. The system is complicated and the internal reaction is uncontrollable; and the melting grafting process and subsequent purification process are relatively tedious and difficult. To meet the needs of industrialization

[0007] At present, the compatibilizer used in PP / PA composites or glass fiber reinforced polypropylene composites is generally the traditional maleic anhydride grafted polypropylene compatibilizer (PP-g-MAH), while the traditional PP functionalized graft The method generally has disadvantages such as low grafting rate and high residual amount of maleic anhydride monomer, which inhibits the compatibilization effect of functionalized grafted polypropylene to a certain extent, and the mechanical properties of composite materials are therefore limited to a certain extent.

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