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Preparation method of liquid crystal copolyester material containing phosphorus and nitrogen

A copolyester, liquid crystal technology, applied in liquid crystal materials, chemical instruments and methods, etc., can solve the problems of single material solubility, harsh processing and preparation technology, etc., achieve high carbon residue rate, good solubility in polar solutions, good solubility The effect of thermal stability

Inactive Publication Date: 2016-05-25
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For pure polyphenylene, its processing and preparation process is harsh, and the solubility of the material is single

Method used

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  • Preparation method of liquid crystal copolyester material containing phosphorus and nitrogen
  • Preparation method of liquid crystal copolyester material containing phosphorus and nitrogen
  • Preparation method of liquid crystal copolyester material containing phosphorus and nitrogen

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specific Embodiment approach

[0026] (1) Dissolve 1 part of polycyclotriphosphazene prepared by multiple sublimation in tetrahydrofuran (THF) solvent, add dropwise the prepared 4 parts of sodium phenoxide THF solution, and react under nitrogen protection at 40°C for 24 hours. THF was removed by rotary distillation, washed several times with deionized water, and vacuum-dried at 80°C for 24 hours to obtain a milky white colloid.

[0027] (2) Dissolve 1 part of solid powder obtained in step (1) in THF solvent, add dropwise 6 parts of THF solution of hydroquinone (HQ), under nitrogen protection, react at 40°C for 12 hours. THF was removed by rotary distillation, washed repeatedly with deionized water and ethanol, and vacuum-dried at 80°C for 12 hours to obtain a yellow colloid.

[0028] (3) Add 0.5wt% anhydrous acetic acid to 1 part of the yellow colloid obtained in step (2), heat it to 180°C in a vacuum environment, and add 2 parts of p-acetoxybenzoic acid (ABA). After reacting for 2 hours, the temperature w...

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Abstract

The invention relates to a preparation method of a phosphorus and nitrogen-containing liquid crystal copolyester material. The structural formula of the phosphorus and nitrogen-containing liquid crystal copolyester material is as shown in the specification. On the premise of maintaining the excellent thermal stability of wholly aromatic copolyester, the phosphorus and nitrogen-containing liquid crystal copolyester is easily dissolved in high-polarity organic solvents, so that the machining property of the material is enhanced. The phosphorus and nitrogen-containing liquid crystal copolyester has higher carbon residual rate at 600 DEG C, thereby providing new selection for mechanical high-temperature solid lubricating materials.

Description

technical field [0001] The invention relates to a liquid crystal copolyester material and a preparation method thereof, in particular to a preparation method of a phosphorus nitrogen-containing liquid crystal copolyester material. Background technique [0002] The special structure and superior performance of polyphosphazene (HCCP) determine its extensive research and application in many fields. At present, it mainly focuses on nonlinear optical materials, special rubber and elastic materials, separation membranes, flame retardant materials, solid electrolytes, and pharmaceutical and biomedical materials. Chemical Structure: [0003] [0004] Polyphenylene ester (POB), a polymer containing p-benzoyl repeating structural units in the main chain of the molecule, the material is light yellow to brownish-yellow crystalline powder or pellet, with excellent heat resistance and high dimensional stability at high temperatures , and has high flame retardancy, will not shrink whe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/692C08G63/78C09K19/38
Inventor 郭强钱君质毕宸洋张天骄陈新新刘隽
Owner SHANGHAI UNIV