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Liquid crystal polymer composite material and preparation method thereof

A technology of liquid crystal polymers and composite materials, which is applied in the field of liquid crystal polymer composite materials and their preparation, can solve problems such as the difficulty of processing liquid crystal polymer materials into films, and achieve the effects of improved mechanical properties, easy film formation, and simple processes

Inactive Publication Date: 2021-10-01
NINGXIA QINGYAN POLYMER MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Due to its structural characteristics, liquid crystal polymer materials have good fluidity and anisotropy in the molten state, can show order in the molten state, and the molecular chains have a tendency to align along the stress direction, and these characteristics lead to Liquid crystal polymer materials become difficult to process into films

Method used

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  • Liquid crystal polymer composite material and preparation method thereof

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Effect test

Embodiment 1

[0043] One embodiment of the present invention provides a method for preparing a liquid crystal polymer composite material, which includes the following steps:

[0044] 1) 90 parts of liquid crystal copolymer, 5 parts of polyester polymer and 5 parts of bisphenol A polycarbonate were fully dried in an oven at 100°C for 12 hours and then fully mixed to obtain a mixed base;

[0045] 2) Melt and mix the mixed base material in a co-rotating twin-screw extruder at 270° C. and 220 r / min, and then extrude and granulate to obtain a liquid crystal polymer composite material.

[0046] Among them, the melting point of the liquid crystal copolymer is 320°C, and the heat distortion temperature is 270°C.

[0047] The preparation method of the polyester polymer comprises: polycondensation and polymerization of bisphenol A and terephthalic acid to obtain the polyester polymer.

[0048] The preparation method of the bisphenol A polycarbonate comprises: post-condensation polymerization of bisp...

Embodiment 2

[0054] One embodiment of the present invention provides a method for preparing a liquid crystal polymer composite material, which includes the following steps:

[0055] 1) 80 parts of liquid crystal copolymer, 10 parts of polyester polymer and 10 parts of bisphenol A polycarbonate were fully dried in an oven at 100°C for 12 hours and then fully mixed to obtain a mixed base;

[0056] 2) Melt and mix the mixed base material in a co-rotating twin-screw extruder at 289° C. and 160 r / min, and then extrude and granulate to obtain a liquid crystal polymer composite material.

[0057] Among them, the melting point of the liquid crystal copolymer is 320°C, and the heat distortion temperature is 210°C.

[0058] The preparation method of the polyester polymer comprises: polycondensation and polymerization of bisphenol A and terephthalic acid to obtain the polyester polymer.

[0059] The preparation method of the bisphenol A polycarbonate comprises: post-condensation polymerization of bi...

Embodiment 3

[0065] One embodiment of the present invention provides a method for preparing a liquid crystal polymer composite material, which includes the following steps:

[0066] 1) 70 parts of liquid crystal copolymer, 15 parts of polyester polymer and 15 parts of bisphenol A polycarbonate were fully dried in an oven at 100°C for 12 hours and then fully mixed to obtain a mixed base;

[0067] 2) Melt and mix the mixed base material in a co-rotating twin-screw extruder at 280° C. and 200 r / min, and then extrude and granulate to obtain a liquid crystal polymer composite material.

[0068] Among them, the melting point of the liquid crystal copolymer is 260°C, and the heat distortion temperature is 210°C.

[0069] The preparation method of the polyester polymer comprises: polycondensation and polymerization of bisphenol A and terephthalic acid to obtain the polyester polymer.

[0070] The preparation method of the bisphenol A polycarbonate comprises: post-condensation polymerization of bisp...

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Abstract

The invention discloses a liquid crystal polymer composite material and a preparation method thereof. The preparation method comprises the following steps of: (1) mixing a liquid crystal copolymer, a polyester polymer and an additive to obtain a mixed base material; and (2) melting and mixing the mixed base material in a co-rotating twin-screw extruder, and extruding and granulating to obtain the liquid crystal polymer composite material. The mixed base material is prepared from the following components in parts by weight: 50-90 parts of the liquid crystal copolymer; 5-30 parts of the polyester polymer; and 5-20 parts of the additive. According to the invention, the polyesterpolymer and the additive with similar structures are introduced into the liquid crystal copolymer, so that the mechanical properties of the liquid crystal copolymer are improved while the original dielectric properties of the liquid crystal copolymer are not influenced, the viscosity of the liquid crystal polymer can be improved, and the liquid crystal polymer can form a film more easily. The preparation method is simple in process and high in processability.

Description

technical field [0001] The invention relates to the technical field of liquid crystal polymers, in particular to a liquid crystal polymer composite material and a preparation method thereof. Background technique [0002] In recent years, the rapid development of the communication field has led to the attention of high-performance engineering plastics. Among them, liquid crystal polymer materials are due to their high heat resistance, high flame retardancy, low dielectric constant and low dielectric loss factor, etc. It has become one of the main development materials in this field due to its excellent performance. [0003] Due to its structural characteristics, liquid crystal polymer materials have good fluidity and anisotropy in the molten state, can show order in the molten state, and the molecular chains have a tendency to align along the stress direction, and these characteristics lead to Liquid crystal polymer materials are difficult to process into films. Therefore, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/12C08L67/02C08L69/00
CPCC08L101/12C08L2205/03C08L2203/16C08L67/02C08L69/00
Inventor 张东宝于冉徐良
Owner NINGXIA QINGYAN POLYMER MATERIALS CO LTD
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