High dielectric property polypropylene/nylon/whisker composite material and preparation method thereof

Abstract

The invention discloses a high dielectric property polypropylene / nylon / whisker composite material and a preparation method thereof. The prepared material comprises, by weight, 65-90 parts of polypropylene, 10-35 parts of nylon, 2-20 parts of a compatibilizer, 5-20 parts of modified ceramic whisker, 0.2-2.0 parts of a thermal stabilizer and 0.2-2 parts of a processing aid. According to the invention, the ceramic whisker with the surface modified by a silane coupling agent is selected to reinforce the polypropylene / nylon composite material, and the maleic anhydride grafted polypropylene compatibilizer is added to increase the binding force between resin interfaces. The obtained composite material has good dielectric properties on the basis of high tensile strength, and can be widely applied in some fields with high requirements for material strength and dielectric properties.

Description

technical field [0001] The invention relates to a reinforced polypropylene / nylon composite material and a preparation method thereof, in particular to a high dielectric property polypropylene / nylon / whisker composite material and a preparation method thereof, belonging to the technical field of polymer composite materials and their processing . Background technique [0002] Nylon is a crystalline polymer with high polarity and the ability to form hydrogen bonds between molecular chains, and has a certain reactivity. It belongs to engineering plastics. It has good mechanical properties and wear resistance, but due to the high polarity of nylon, nylon is easy to absorb water, which affects its dimensional stability and electrical properties, especially dielectric properties. Polypropylene is the most widely used general-purpose plastic. Compared with other general-purpose plastics, it has the advantages of low cost, excellent mechanical properties, good chemical resistance, lo...

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Problems solved by technology

It has good mechanical properties and wear resistance, but due to the high polarity of nylon, nylon is easy to absorb water, which affects its dimensional stability and electrical properties, especially dielectric properties

Polypropylene is the most widely used general-purpose plastic. Compared with other general-purpose plastics, it has the advantages of low cost, excellent mechanical properties, good chemical resistance, low water absorption, and excellent insulation, heat resistance and transparency. Very good, but at the same time, there are also disadvantages such as low heat distortion temperature, poor low temperature toughness, large molding shrinkage, poor light resistance, and not easy to dye, and these shortcomings limit its wider application. In order to broaden its application field, for Polypropylene has been widely used for resin modification and has a large number of applications

[0003] At present, in the existing technology, nylon and polypropylene are modified by blending methods, which can combine the advantages of the two to obtain impact resistance, high wear resistance, high heat resistance, low water absorption, easy coloring, shape and dimensional stability Higher polypropylene / nylon compound, but still less than ideal for strength

Therefore, some researchers add various reinforcing fillers, such as calcium carbonate fillers, glass fibers, etc., to the composite materials of polypropylene and nylon. However, although the above-mentioned reinforcing fillers can obtain composite materials with good strength, they cannot guarantee the good strength of the material. Improving the dielectric properties of composite materials

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