Continuous carbon fiber reinforced polypropylene high-performance electricity-conductive and heat-conductive composite material and preparation thereof

Abstract

The invention relates to a continuous carbon fiber reinforced polypropylene high-performance electricity-conductive and heat-conductive composite material and a preparation thereof. The continuous carbon fiber reinforced polypropylene high-performance electricity-conductive and heat-conductive composite material comprises the components in parts by weight: (1) 100 parts of polypropylene, (2) 0.1-1 parts of an antioxidant, (3) 0.2-2 parts of a flow promoter, and (5) 1-5 parts of a compatilizer; after being premixed according to a certain proportion, the components are melted, mixed and extruded into a hanger-shaped mold head by a double / single-screw machine unit to be shunted; finally, the components enter an S-shaped mold head to sufficiently soak carbon fibers so as to prepare the continuous carbon fiber reinforced polypropylene high-performance electricity-conductive and heat-conductive composite material. Compared with the traditional carbon fiber reinforced PP composite material, the continuous carbon fiber reinforced polypropylene high-performance electricity-conductive and heat-conductive composite material provided by the invention has the advantages that the mechanical property of the continuous carbon fiber reinforced composite material prepared by using a special soaking process is greatly improved because the length retention rate of carbon fibers in a PP carrier is very high or the carbon fibers are continuous in the PP carrier; on the basis of a continuous network structure, the electricity-conductive and heat-conductive performances of the continuous carbon fiber reinforced composite material are also greatly improved.

Description

technical field [0001] The invention relates to a continuous carbon fiber reinforced polypropylene high performance conductive and thermal conductive composite material and its preparation. Background technique [0002] Polypropylene (PP for short) is a kind of thermoplastic resin prepared by polymerizing propylene, including copolymers of propylene and a small amount of ethylene. It is usually a translucent, colorless solid, odorless and non-toxic; due to its regular structure and Highly crystallized, so the melting point can be as high as 167°C. It has low density and is the lightest general-purpose plastic; it is particularly stable to water, and its water absorption rate in water is only about 0.01%; it is heat-resistant and corrosion-resistant, and its products can be sterilized by steam. Its strength, stiffness, hardness and heat resistance are superior to those of low-pressure polyethylene, and it can be used at around 100°C. It has good dielectric properties and hi...

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Problems solved by technology

For example, although the strength of polypropylene is higher than that of polyethylene, and the tensile strength can reach more than 30MPa, it still limits its application in the field of high performance requirements.

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