A kind of polyolefin-based conductive and dielectric composite material and preparation method thereof

Abstract

The invention relates to the novel field of polyolefin-based conductive and dielectric composite materials, and particularly relates to a polyolefin-based conductive and dielectric composite material and a preparation method thereof. The polyolefin-based conductive and dielectric composite material is prepared from the following raw materials in parts by weight: 70 to 95 parts of polyolefin matrix, 5 to 30 parts of ethylene-octene block copolymer, and 0. 1 to 15 parts of electrically conductive filler. The polyolefin-based conductive composite material provided by the invention has the advantages of relatively low conductivity percolation threshold, relatively high conductivity and dielectric constant when the content of the conductive filler is very low, relatively high strength and toughness, and good overall performance.

Description

technical field [0001] The invention relates to a new field of polyolefin-based conductive and dielectric composite materials, in particular to a polyolefin-based conductive and dielectric composite material and a preparation method thereof. Background technique [0002] In recent years, conductive polymer composites have been widely used in static dissipation, electromagnetic shielding, electronic sensors, and capacitors because of their advantages such as low density, easy processing, solvent resistance, and adjustable conductivity. However, in order to obtain conductive polymer composites with high conductivity, it is usually necessary to add a large amount of conductive fillers, and a large amount of conductive fillers will increase the cost of the molding process and greatly reduce the mechanical properties of the material. Therefore, there are currently two main problems in the design of conductive polymer composites: how to reduce the conductive percolation threshold ...

AI Technical Summary

Problems solved by technology

However, due to factors such as weak interfacial adhesion and defects between the conductive particles and the polymer matrix, the mechanical properties of the conductive materials obtained by these methods are generally very poor, especially for materials with isolated structures, which have rigidity, toughness, etc. The mechanical properties are generally extremely poor; at the same time, the construction of a special structure will inevitably bring about a complex process, these problems greatly limit the industrial production and application of conductive polymer materials, so how to easily prepare a low Conductive polymer composites with percolation, high conductivity and good mechanical properties are very necessary

Images