Conductive foamed polypropylene material and preparation method thereof

Abstract

The invention discloses a conductive foamed polypropylene material and a preparation method thereof. The conductive foamed polypropylene material is prepared from a conductive foamed polypropylene prefabricated material and a foaming agent, the adding amount of the foaming agent accounts for 2-5% of the weight of the conductive foamed polypropylene material, and the conductive foamed polypropyleneprefabricated material is prepared from the following components in parts by weight: 54 to 86.8 parts of polypropylene, 8 to 15 parts of conductive carbon black, 0 to 10 parts of a toughening agent,5 to 20 parts of a filler, 0.1 to 0.5 part of an antioxidant and 0.1 to 0.5 part of a processing aid. According to the invention, a micro-foaming process is applied to a conductive modified polypropylene material, conductive carbon black is added to form a cross-linked network structure, and based on the formation of foam holes in the material, the conductive carbon black dispersed in a base material is gathered in the base body intensively in volume, so that the effective and compact conductive path is formed in the material so as to reduce the use amount of the conductive additive of the material, effectively and significantly reduce the surface resistance of the material, improve the conductive effect of the material and reduce the cost of the material; and the preparation process is simple, and the prepared polypropylene material is excellent in performance.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, in particular to a conductive foamed polypropylene material and a preparation method thereof. Background technique [0002] Due to its good comprehensive properties, polypropylene materials are widely used in the automotive field and electronic and electrical products. However, in addition to the requirements of good mechanical properties, processing properties, weather resistance and other characteristics of these polypropylene parts, some special fields require materials to have special properties such as antistatic performance and light weight performance. Combined with the conductive technology, a polypropylene material with low price and excellent mechanical properties can be prepared. [0003] For traditional conductive materials, in order to achieve a better conductive effect, the amount of conductive carbon black added to the material is usually about 25-40%, which greatly incr...

AI Technical Summary

Problems solved by technology

[0003] For traditional conductive materials, in order to achieve a better conductive effect, the amount of conductive carbon black added to the material is usually about 25-40%, which greatly increases the cost of the material. At the same time, the addition of a large amount of conductive carbon black will greatly affect the material. The mechanical properties of the material itself, which limits the scope of use of the material

At the same time, due to the low melt strength of the traditional micro-foamed polypropylene material, the foaming effect is often poor, and the cells are easy to collapse and rupture, so the practical application is very limited

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