High-temperature-resistant polyethylene composite material and preparation process thereof

Abstract

The invention discloses a high-temperature-resistant polyethylene composite material and a preparation process thereof. The polyethylene composite material is prepared from the following raw materialsin parts by weight: 80-100 parts of polyethylene, 7.5-9 parts of an antioxidant, 8-10 parts of a modified flame retardant, 6-8 parts of a lubricant, 8.5-10 parts of titanium dioxide, 12-14 parts of carbon fibers and 6-9 parts of a plasticizer. According to the invention, the modified flame retardant is added in the preparation process which has very good flame retardance, and a large amount of carboxyl groups at the same time, carboxyl groups have relatively high polarity, so that the volatility resistance and the high-temperature resistance of the material are improved; the carbon fibers arehigh-strength high-modulus fibers with a carbon content of 90% or more, and have good high temperature resistance; titanium dioxide can be converted into rutile state from anatase state at high temperature, the material high temperature resistance can be better improved, and the high temperature resistance of the polyethylene composite material is further improved by mixing the modified flame retardant with the carbon fibers and titanium dioxide powder.

Description

technical field [0001] The invention belongs to a polyethylene preparation process, in particular to a high-temperature-resistant polyethylene composite material and a preparation process thereof. Background technique [0002] With the rapid development of industry, various new materials are emerging, and resin materials have gradually become common materials in daily production and life. Among them, polyethylene is also the most common synthetic resin. Polyethylene is a thermoplastic resin obtained by polymerization of ethylene. , has the properties of heating softening and cooling hardening, and does not react chemically, and has high plasticity; [0003] The common polyethylene composite materials currently on the market have good corrosion resistance and insulation and low manufacturing cost. They are good industrial materials, but their high temperature resistance is average, and polyethylene composite materials soften or even melt under high temperature conditions. Ph...

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Problems solved by technology

[0003] The common polyethylene composite materials currently on the market have good corrosion resistance and insulation and low manufacturing cost. They are good industrial materials, but their high temperature resistance is average, and polyethylene composite materials soften or even melt under high temperature conditions. Phenomenon, greatly reducing the practicability of polyethylene composites;

[0004] Chinese invention CN104119599A discloses a polyethylene composite material and its preparation process. The polyethylene composite material is made of the following raw materials in parts by weight: 70-85 parts of polyethylene, 20-25 parts of polyvinyl alcohol, and 12-20 parts of polyoxymethylene , 5-8 parts of glyceryl stearate, 5-12 parts of zinc oxide, 1-3 parts of tartaric acid, 0.5-3 parts of diisocyanate; the polyethylene composite material prepared by the invention has good electrical insulation, mechanical strength, Impact resistance and cold resistance, but not high temperature resistance. When the temperature of the use environment rises, the polyethylene composite material will soften, resulting in greatly reduced performance and cannot be used normally.

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