Preparation method of high-stability conductive plastics with good mechanical property

Abstract

The invention discloses a preparation method of high-stability conductive plastics with good mechanical property. The preparation method comprises the following steps of (1) preparation of a characteristic filler; (2) weighing of raw materials for standby; (3) blending treatment; and (4) extrusion molding. The method provided by the invention is reasonable in technological step matching, relatively low in production cost, convenient in large-scale production, popularization and application, good in conductivity of the prepared conductive plastics, excellent in mechanical quality and stable inuse characteristic and has great market competitiveness and processing production benefit.

Description

technical field [0001] The invention belongs to the technical field of conductive polymer materials, and in particular relates to a preparation method of a high-stability conductive plastic with good mechanical properties. Background technique [0002] Composite conductive polymer materials are made of synthetic resin with good electrical insulation, various conductive fillers and other additives through synthesis, injection, molding or extrusion. Because it not only has a conductive function, but also has the advantages of polymer materials, and its cost is low, it has been widely used in the field of electronics. Commonly used synthetic resins include PE, PS, PC, ABS, PA, PBT, PET, PPO, PPS and high-performance thermoplastic alloys. Among them, ABS resin is a kind of engineering plastics widely used. It is a copolymer of acrylonitrile-butadiene-styrene. ABS resin has the advantages of three monomer polymers. It not only has the excellent resistance of polyacrylonitrile C...

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Problems solved by technology

In this regard, people have carried out a lot of experimental explorations to prepare conductive plastics by combining graphene with plastics. Although the material has good electrical conductivity, it is generally found that the dispersion of graphene in the plastic matrix is ​​a big problem in the preparation.

In order to further solve this problem, the patent application number 201410456105.8 discloses a method for the preparation of graphene / ABS composite materials by bulk in-situ polymerization. Although this method utilizes the characteristics of low viscosity of in-situ polymerization monomers, it can fully integrate with graphene Composite materials with uniform performance are prepared by mixing, but this method still cannot avoid the use of dangerous chemicals such as toluene and ethylbenzene; the patent "a preparation method of a polymer-graphene mixture" published by the application number 201310641974.3 uses graphite powder The advantages of the same granular powder as the polymer, using dry ball milling to exfoliate the graphite layer in situ to prepare a mixture of polymer and graphene, but in the process of dry ball milling, the ball mill will still hit graphene, resulting in graphene The destruction of the structure affects the performance of graphene; the patent application number 201510035627.5 discloses a graphene / ABS conductive plastic and its blasting stripping preparation method and application, and uses reasonable control of foaming agent, pressure and other conditions in the preparation process to make Graphite is uniformly dispersed and filled in the plastic matrix, but the method has strict control conditions, high preparation costs such as high pressure, and the mechanical quality of the plastic produced is poor

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