Continuous basalt fiber reinforced polypropylene composite material and preparation method and application thereof

Abstract

The invention relates to the field of high polymer materials, and discloses a continuous basalt fiber reinforced polypropylene composite material. The continuous basalt fiber reinforced polypropylenecomposite material comprises the following raw materials in parts by weight: 35 to 60 parts of polypropylene, 20 to 40 parts of continuous basalt fibers, 10 to 35 parts of a flame retardant, 1-5 partsof whiskers, 2-6 parts of a compatilizer, and 0.5-4 parts of a targeting nanometer synergistic functional master batch. The preparation method of the material comprises the following steps: uniformlymixing the raw materials, adding the obtained mixture into blending equipment for melt blending, extruding the mixture into an impregnation mold, and drawing the continuous basalt fibers into the impregnation mold for impregnation to obtain the polypropylene composite material. According to the invention, the impregnation effect of the flame retardant and the continuous basalt fibers is improvedby adding the targeting nanometer synergistic functional master batch, and the stability of a carbon layer is improved through combination with the whiskers, so the polypropylene composite material with excellent mechanical properties and flame retardancy is obtained and has wide application prospects in the fields of new energy automobiles and the military industry.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a high-strength, highly flame-retardant continuous basalt fiber reinforced polypropylene composite material, a preparation method and application. Background technique [0002] Compared with ordinary short fiber reinforced polypropylene, long fiber reinforced polypropylene retains a longer fiber length during the molding process, forming a fiber skeleton structure, and has more excellent mechanical properties and good dimensional stability. It is used in automobiles, Electronics, aerospace and other fields have a wide range of applications. Commonly used reinforcing fibers are glass fiber, basalt fiber, carbon fiber, aramid fiber, etc. Basalt fiber, also known as continuous basalt fiber, has a high cost performance compared with other fibers, and its performance can be compared with carbon fiber, but the price is only one tenth of carbon fiber, with high strength, high modulus, ...

AI Technical Summary

Problems solved by technology

In order to avoid the decomposition of the flame retardant, the invention melts and extrudes the basalt fiber and the flame retardant masterbatch at a temperature of 180°C to 230°C, but the composite material produced by this method is comparable to the continuous basalt fiber reinforced composite material. In comparison, the fiber length retained in the part is short, and a stable skeleton structure cannot be formed during combustion; at the same time, the addition of a large amount of flame retardant destroys the continuity of the polypropylene matrix, and the mechanical properties are greatly reduced.

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