Preparing method of hexagonal boron nitride/polystyrene composite

Abstract

The invention discloses a preparing method for a hexagonal boron nitride / polystyrene composite and belongs to the technical field of high polymer material modification and the technical field of processing. The preparing method comprises the steps that firstly, a suspension polymerization method is adopted, and h-BN@PS masterbatch is prepared from boron nitride, styrene, a coupling agent, an initiator and a dispersing agent, wherein the mass ratio of the h-BN@PS masterbatch to polystyrene is 1:(3-5); the h-BN@PS masterbatch and a polystyrene base material are mixed, and the hexagonal boron nitride / polystyrene composite is prepared, wherein the mechanical performance of polystyrene is enhanced, and the heat conductivity coefficient can be increased. The preparing process of the composite is advanced, the compatibility of hexagonal boron nitride and polystyrene can be improved, and operation is simple and environmentally friendly; the composite can obtain high mechanical performance and a high heat conductivity coefficient under a low filler doping amount, and significant application value is achieved.

Description

technical field [0001] The invention relates to a method for preparing a hexagonal boron nitride / polystyrene polymer composite material with high mechanical and thermal conductivity properties, and belongs 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 and high thermal conductivity have gradually become a research hotspot and focus, and have attracted great attention from researchers. Various fields in the national economy have increasingly stringent performance requirements for high-mechanical and high-thermal-conductivity materials. Traditional high-mechanical and high-thermal-conductivity materials have different insurmountable defects, and it is difficult to meet the requirements of modern industries for the diverse functions of thermally conductive materials. sexual demands. Therefore, the development of n...

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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 mechanical properties of polystyrene 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 The corrosion resistance of the material is poor, the price is high, and it is not easy to process and shape; the addition of metal oxide materials will lead to high production costs and complicated processing technology; the addition of graphite materials will cause its insulation performance to deteriorate

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