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Preparation method of high-impact liquid crystal polymer composite material

A technology of liquid crystal polymers and composite materials, which is applied in the field of preparation of high-impact liquid crystal polymer composite materials, can solve problems such as not being able to meet application requirements, meet the requirements of mass production and manufacturing, have a simple overall process, and have good application prospects Effect

Active Publication Date: 2022-02-08
NANJING QINGYAN POLYMER NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these modification methods usually cannot improve the impact strength while ensuring the flame retardancy of the composite material, so the modified composite material still cannot meet the higher application requirements.

Method used

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  • Preparation method of high-impact liquid crystal polymer composite material

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preparation example Construction

[0026] The preparation method of the high-impact liquid crystal polymer composite material provided by the invention comprises the following steps:

[0027] S1: A polymer with a silicone core-shell structure prepared by emulsion polymerization;

[0028] S2: Disperse the compatibilizer, anti-aging agent and lubricant in the liquid crystal polymer by mechanical blending to form a mixture;

[0029] S3: Melt extrusion, water-cooling, air-drying, pelletizing and drying of the polymer and the mixture with the silicone shell structure to obtain a high-impact liquid crystal polymer composite material.

[0030] Further, the steps for preparing a polymer with a silicone shell structure in S1 are as follows: add 100-150 g of distilled water, 0.1-0.3 g of sodium lauryl sulfate and 0.2-0.5 g of an emulsifier into the reaction vessel, stir and heat up to 70 -90°C, add 20-30g distilled water, 0.05-0.1g sodium lauryl sulfate, 0.05-0.1g emulsifier, 10g octamethylcyclotetrasiloxane and 1-2h si...

Embodiment 1

[0042] S1: Add 120g of distilled water, 0.15g of sodium lauryl sulfate, and 0.3g of emulsifier OP-10 into a 500ml four-necked flask equipped with a stirrer, a constant pressure drop funnel, a condenser and a thermometer, and keep stirring at a constant speed 200rpm, then raise the temperature of the oil bath to 80°C; then add 30g of distilled water, 0.05g of sodium lauryl sulfate and 0.1g of OP-10 into a beaker, and then add 10g of octamethylcyclotetrasilicon Oxygen and 2g of γ-methacryloxypropyl trimethoxysilane, after ultrasonic dispersion and mixing, slowly drop into the four-necked flask, react for 6h and cool to room temperature; then use 3% NaOH aqueous solution Adjust the pH value of the mixed solution in the four-neck flask to 10, then raise the temperature to 80°C, add 0.06g of ammonium persulfate, and then add 5g of acrylonitrile and 15g of styrene dropwise from the constant pressure dropping funnel. The mixed solution formed, the dropping speed is 5-8s / drop, continu...

Embodiment 2

[0046] S1: Add 120g of distilled water, 0.2g of sodium lauryl sulfate, and 0.5g of emulsifier OP-10 into a 500ml four-necked flask equipped with a stirrer, a constant pressure drop funnel, a condenser and a thermometer, and keep stirring at a constant speed 200rpm, then raise the temperature of the oil bath to 80°C; add 20g of distilled water, 0.06g of sodium lauryl sulfate and 0.1g of OP-10 into a beaker, and then add 10g of octamethylcyclotetrasilicon Oxygen and 2g of γ-methacryloxypropyltrimethoxysilane were ultrasonically dispersed and mixed uniformly, and then slowly added dropwise into a four-necked flask, reacted for 6 hours and then cooled to room temperature; then 3% NaOH aqueous solution Adjust the pH value of the mixed solution in the four-neck flask to 10, then raise the temperature to 80°C, add 0.08g of ammonium persulfate, and then add 6g of acrylonitrile and 17g of styrene dropwise from the constant pressure dropping funnel. The mixed solution formed, the droppi...

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Abstract

The invention relates to the technical field of high polymer materials, in particular to a preparation method of a high-impact-resistance liquid crystal polymer composite material. According to the preparation method of the high-impact liquid crystal polymer composite material, provided by the invention, an organic silicon core-shell polymer which takes polysiloxane as a core and a styrene-acrylonitrile copolymer as a shell is prepared by an emulsion polymerization method, and the polymer of the shell layer is used for improving the compatibility between polysiloxane and LCP and endowing core-shell particles with certain rigidity; and finally, an organic silicon core-shell modifier is introduced into the LCP in a melt blending manner to prepare the high-impact liquid crystal polymer composite material. The organic silicon core-shell polymer not only can improve the impact strength of the LCP, but also can keep the flame retardant property of the LCP, so that the liquid crystal polymer composite material prepared by the preparation method disclosed by the invention not only keeps the original performance characteristics of the LCP material, but also has improved impact resistance, can better meet the application requirements, and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a preparation method of a high-impact liquid crystal polymer composite material. Background technique [0002] Liquid crystal polymer (LCP) is an intermediate state polymer between solid crystal and liquid. Although its molecular arrangement is not as three-dimensionally ordered as solid crystal, it is not as disordered as liquid, but has a certain order. . It is a new type of polymer material, which generally exhibits liquid crystallinity in the molten state. LCP has good high temperature performance, good radiation resistance, hydrolysis resistance, weather resistance, chemical resistance, inherent flame retardancy, etc., making it widely used in many fields such as electronics, optical fibers, automobiles and aerospace. application prospects. However, the defects of LCP are also obvious. Due to its unique properties, its crystallization is oriented along the weldi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/12C08L51/08C08F283/12C08F212/10C08F220/44
CPCC08L101/12C08F283/124C08F283/12C08L2201/02C08F212/10C08F220/44C08L51/085
Inventor 张东宝于冉徐良
Owner NANJING QINGYAN POLYMER NEW MATERIAL CO LTD
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