High-performance heat conduction material and preparation method thereof

Abstract

The invention relates to the technical field of high polymer materials, and discloses a high-performance heat conduction material. The high-performance heat conduction material consists of the following components in part by weight: 25 to 50 parts of polyetherimide (PEI), 5 to 10 parts of polyamide (PA), 30 to 60 parts of heat conduction filler, 5 to 15 parts of reinforcing material, 0 to 2 parts of compatilizer, 0 to 5 parts of lubricating agent, and 0 to 5 parts of other aid; and a nine-section temperature control twin-screw extrusion process is used as a preparation method. The characteristic of heat conduction and the mechanical property of the heat conduction high polymer material are balanced. By adding the heat conduction filler, the heat-conducting property of the material is improved; by adding PA, the processing performance of the material is improved, and cost is reduced; and compatilizer, the lubricating agent, and other aids are added selectively, so that the performance of the material can be improved further according to using requirements.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a high-performance heat-conducting material and a preparation method thereof. Background technique [0002] Polyetherimide (PEI), good thermal stability (Tg=215°C), no deformation under high temperature and load conditions, continuous use temperature up to 170°C, and excellent flame retardant properties ( Oxygen index greater than 47, low smoke generation), strong toughness, radiation resistance and chemical resistance, wear-resistant and microwave-permeable, and good dielectric properties, stable in a wide range of frequencies and temperatures Dielectric constant and dielectric loss values ​​and very high dielectric strength. The excellent thermal mechanical properties, electrical properties, chemical resistance and radiation resistance of polyetherimide make it widely used in industries such as automobiles, instrumentation, electronic appliances, machinery and aerosp...

AI Technical Summary

Problems solved by technology

However, polyetherimide has the disadvantages of high price and high processing temperature, and with the increasing requirements of high-tech materials, it is required to further improve the heat resistance and mechanical strength of the product. In the existing heat-conducting plastic preparation process, If the thermal conductivity of the material is greatly improved, the mechanical properties will be greatly reduced; if the mechanical properties of the material are ensured, the thermal conductivity of the material will be poor