Heat-conducting insulating master batch and preparation method thereof

Abstract

The invention discloses a heat-conducting insulating master batch and a preparation method thereof. The material is composed of the following raw materials in parts by weight: 10-78 wt% of polypropylene; 0.1 to 10 weight percent of maleic anhydride; graphite: 10 to 30 wt%; 10 to 50 wt% of a ceramic filler; 0.01 to 0.5 wt% of an initiator, and 0.1 to 1 wt% of other auxiliary agents. On one hand, multiple fillers in different shapes are adopted for composite filling, and different heat-conducting fillers generate a complementary effect by utilizing the structural difference of heat-conducting particles; and on the other hand, the heat-conducting filler is easy to agglomerate, the compatibility between filler particles and macromolecules is poor, and the heat transfer efficiency is hindered, so that by optimizing the formula and the process, the interfacial compatibility between the heat-conducting filler and a polymer matrix material is improved, and the dispersion of the filler particles is improved, thereby realizing excellent heat-conducting and insulating effects of the material. The method is relatively simple in preparation process and suitable for industrial batch production, and the comprehensive cost of materials is reduced.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a heat-conducting and insulating masterbatch and a preparation method thereof. Background technique [0002] Traditional thermally conductive fillers, such as metals, ceramics and other materials, have good thermal conductivity, but are limited by the defects of the materials themselves and cannot meet a wide range of application requirements. Metal materials have poor insulation, poor corrosion resistance, large thermal expansion coefficient, long molding process cycle, and expensive prices; ceramic materials have poor toughness, high specific gravity, high molding difficulty, difficult to achieve mass production, and their product structure is relatively simple. Polymer materials have good comprehensive properties, avoiding the shortcomings of traditional heat-conducting materials, and their own modification, strong plasticity and good processing performance make them widely us...

AI Technical Summary

Problems solved by technology

When there are too few thermally conductive fillers, it is impossible to form a thermal conduction path in the polymer matrix material, and the polymer material coated on the surface of the filler blocks the transfer of heat, and the thermal conductivity of the composite material cannot be greatly improved.

It is not advisable to blindly increase the filling amount of thermally conductive fillers. Although the thermal conductivity has been improved, the mechanical properties, processing properties and other comprehensive properties of composite materials have suffered a large loss, and the application is still limited.

Images