Ternary blend-based composite material with high dielectric properties and preparation method thereof

Abstract

The invention belongs to the field of polymer composite materials, and in particular relates to a ternary polymer blend-based composite material with high dielectric properties and a preparation method thereof. The invention provides a ternary blend-based composite material with high dielectric properties. The composite material is a ternary blend prepared from polymer 1, polymer 2, polymer 3 and fillers through melt blending and thermocompression molding. Blending system, wherein the filler is selectively dispersed in any polymer phase; the composite material has a double bicontinuous structure: it means that in the ternary blending system, the polymer 1 phase and the polymer 2 phase form a co-continuous structure, The polymer 2 phase and the polymer 3 phase form a co-continuous structure, the polymer 2 phase completely separates the polymer 1 phase and the polymer 3 phase, and there is no phase interface between the polymer 1 phase and the polymer 3 phase. The composite material obtained by the method of the invention has excellent dielectric properties, low filling amount of conductive particles, simple operation and low cost, and is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and in particular relates to a ternary polymer blend-based composite material with high dielectric properties and a preparation method thereof. Background technique [0002] With the rapid development of miniaturization and multi-functionalization of electronic devices, dielectric materials have received extensive attention as an important functional material. Among them, polymer-based dielectric composites are widely used due to their light weight and good processability. [0003] At present, the fillers commonly used to increase the dielectric constant of polymer matrix mainly include inorganic ceramic particles and conductive particles. For polymer-based dielectric composites filled with ceramic particles, a higher filling amount is generally required to obtain a higher dielectric constant; in addition, the compatibility between ceramic particles and polymers is poor, and when the f...

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Problems solved by technology

For polymer-based dielectric composites filled with ceramic particles, a higher filling amount is generally required to obtain a higher dielectric constant; in addition, the compatibility between ceramic particles and polymers is poor, and when the filling amount of ceramic particles is lower When it is high, the dispersion of inorganic particles becomes poor, and it is difficult to process, which limits its application, and the design of high-performance dielectric materials through polymer-based conductive materials has become a potential development

Composite materials with high dielectric constant are usually obtained by controlling the content of filled conductive nanoparticles, which is mainly attributed to the formation of filler-polymer-filler microcapacitance inside the material, however, a high content of conductive particles simultaneously causes the material Increased dielectric loss

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