Hexagonal boron nitride/polypropylene polymer composite and preparation method

Abstract

The invention discloses hexagonal boron nitride / polypropylene polymer composite and a preparation method thereof. According to the composite, polypropylene is taken as a main material, hexagonal boron nitride is taken as filler, an antioxidant, a lubricating agent and a compatilizer are added, and the composite is prepared, wherein the mass ratio of hexagonal boron nitride to polypropylene is 1: (2.2-18.8); the adding amount of the antioxidant accounts for 0.2%-1% of the total weight of hexagonal boron nitride and polypropylene, the adding amount of the lubricating agent accounts for 0.3%-1% of the total weight of hexagonal boron nitride and polypropylene, and the adding amount of the compatilizer accounts for 0.5%-1% of the total weight of hexagonal boron nitride and polypropylene. Compared with a polypropylene material matrix, the hexagonal boron nitride / polypropylene polymer composite prepared through a twin-screw extruder can enhance the mechanical property and can increase the thermal conductivity coefficient. The preparation process of the composite is simple to operate and environment-friendly, and the composite can obtain higher mechanical property and heat conductivity coefficient under the condition of the lower filler mixing amount and has important application value.

Description

technical field [0001] The invention relates to a hexagonal boron nitride / polypropylene polymer composite material with high mechanical and thermal conductivity and a preparation method thereof, belonging to the technical field of polymer material modification and processing. Background technique [0002] In recent years, in the field of polymer composite materials, polymer composite materials with high mechanical properties and high thermal conductivity have gradually become one of the research hotspots and priorities, and have attracted great attention from researchers. Various fields in the national economy have increasingly stringent performance requirements for high mechanical properties and high thermal conductivity materials. Traditional high mechanical properties and high thermal conductivity materials have different defects that are difficult to overcome, and it is difficult to meet the functional diversity of modern industries. requirements. Therefore, the develop...

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Problems solved by technology

However, its low thermal conductivity and poor mechanical properties cannot meet the industrial needs of heat dissipation and high strength.

At present, the common way to improve the thermal conductivity and enhance the mechanical properties of polypropylene is to add fillers with high thermal conductivity and high mechanical properties. Adding some fillers can improve the mechanical properties and thermal conductivity, but it will bring other defects, such as adding metal materials After that, its corrosion resistance is poor, the price is high, and it is not easy to process and shape; adding metal oxide materials will lead to high production costs and complicated processing technology; adding graphite materials will cause its insulation performance to deteriorate

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