High conductivity polycarbonate (PC) composite material and preparation method thereof

Abstract

The invention provides a high conductivity polycarbonate (PC) composite material and a preparation method thereof. The polycarbonate composite material is prepared from the following components in parts by weight: 40-60 parts of PC resin, 10-30 parts of conductive master batch, 10-30 parts of reinforcing filler, 2-6 parts of toughening agent, 0.08-1.5 parts of first antioxidant and 0.05-3.0 partsof first lubricating agent, wherein the conductive master batch is prepared from the following components in parts by weight: 40-70 parts of thermoplastic resin, 30-50 parts of conductive filler, 0.1-0.6 part of second antioxidant and 0.5-2 parts of second lubricating agent. The PC composite material provided by the invention has very good electrical conductivity, and the volume resistivity of thePC composite material can reach 10<2> omega.m. Furthermore, the addition ratio of the conductive filler material is lower; when the adding amount of the conductive filler is about 10%, the volume resistivity can reach 10<4> omega.m or below, but the composite material can maintain good mechanical properties. In addition, the high conductivity PC composite material also has higher fluidity and lowwarping property, thus being suitable for performing injection molding on large-size workpieces.

Description

technical field [0001] The invention relates to the technical field of polymer material modification, in particular to a high-conductivity polycarbonate composite material and a preparation method thereof. Background technique [0002] Composite conductive polymer materials (also known as conductive polymer composite materials) refer to metal powder, carbon black (CB), carbon nanotubes (CNT), carbon fibers (CF) and other conductive substances added to insulating polymer materials. The obtained composite material is a multi-phase multi-component system with electrical conductivity. Conductive polymer composites can adjust the electrical and mechanical properties by changing the filler material content, size, characteristics and polymer matrix type. The production process is simple, the manufacturing cost is low, and it is easy to mass-produce. It has been widely used in static electricity, electromagnetic wave shielding, microwave absorption, and digital camera photosensitiv...

AI Technical Summary

Problems solved by technology

[0003] Traditional conductive polymer materials use a large amount of conductive fillers to add to the resin material. However, the compatibility of the conductive filler itself with the resin is not good, and it is difficult to disperse evenly. This will inevitably greatly reduce the mechanical properties of the resin material, thereby limiting the conductivity. Application range of materials

At the same time, the conductive network of traditional conductive composite materials is not perfect, and the resistivity test value of the product often has a large floating range, and the conductivity is easily affected by the environmental conditions of the product.