Low-dielectric liquid crystal composite material as well as preparation method and application thereof

Abstract

The invention discloses a low-dielectric liquid crystal composite material as well as a preparation method and an application thereof, and the low-dielectric liquid crystal composite material comprises the following components in parts by weight: 40-70 parts of liquid crystal polymer; 25-50 parts of polytetrafluoroethylene; and 2-9 parts of a compatilizer. By selecting the liquid crystal polymer with a specific structure and adding a specific amount of polytetrafluoroethylene, the dielectric constant of the material can be remarkably reduced, the flowability of the material is improved, the processability of the material is improved, and the liquid crystal composite material with the dielectric constant lower than 2.5 is prepared; the low-dielectric material can meet the requirements of the development of the current electronic and electrical field on low-dielectric materials, and the product is particularly suitable for precise electronic and electrical equipment.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a low-dielectric liquid crystal composite material and its preparation method and application. Background technique [0002] Thermotropic liquid crystal polyester has excellent melt fluidity, heat resistance, strength and stiffness, and is especially suitable for making products with thin walls, complex structures and surface mount technology, and is widely used as electronic and electrical components and optical components. With the rapid development of electronic information technology, the integration of electronic products continues to increase, and the operating frequency range expands, requiring electronic components to have higher signal propagation speed and transmission efficiency. Therefore, higher performance requirements are put forward for materials. The lower the dielectric constant is, the better it is for signal transmission. At present, electrical and electronic ...

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Problems solved by technology

[0003] In the prior art, the dielectric constant of the material is reduced by introducing nano- or micro-sized pores into the system, such as filling with hollow glass microspheres, which can significantly reduce the dielectric constant of the liquid crystal polyester material, but at the same time it will affect the dielectric constant of the material. The fluidity of the material leads to poor material processing performance. When preparing precision electronic and electrical equipment devices, local filling will be poor due to poor fluidity, which will affect the precision of the device.

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