Preparation method of high-performance carboxyl functionalized poly (arylene ether nitrile)

A carboxyl-functionalized, polyarylene ether nitrile technology, applied in the field of polymer materials, can solve the problems of insufficient diversification of restricted functions in synthesis, processing and application, and achieve functional diversity, excellent thermal stability and thermo-oxidative stability. the effect of expanding the scope of application

Inactive Publication Date: 2019-03-22
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a method for preparing high-performance carboxyl-functionalized polyarylether

Method used

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  • Preparation method of high-performance carboxyl functionalized poly (arylene ether nitrile)
  • Preparation method of high-performance carboxyl functionalized poly (arylene ether nitrile)
  • Preparation method of high-performance carboxyl functionalized poly (arylene ether nitrile)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Preparation of carboxyl-containing monomer phenolphthalein:

[0034] Prepare zinc powder, phenolphthalein and sodium hydroxide according to the molar ratio of 1:0.32:3.76, now prepare sodium hydroxide into a sodium hydroxide solution with a mass fraction of 6.25%, and then add phenolphthalein and zinc powder to the above sodium hydroxide solution , because phenolphthalein transforms into a quinone structure in an alkaline solution, the above mixed solution is purple. Place the mixed solution in a constant temperature water bath at 60°C and maintain mechanical stirring at 600rpm until the purple color disappears completely, then slowly add dilute hydrochloric acid to obtain a white precipitate, wash it repeatedly with deionized water until the washed out liquid is neutral, and finally put The white precipitate was dried in a vacuum oven at 80°C for 72 hours to obtain the carboxyl-containing monomer phenolphthalein;

[0035] 2) Preparation of carboxyl functionalized p...

Embodiment 2

[0038] 1) Preparation of carboxyl-containing monomer phenolphthalein:

[0039] Prepare zinc powder, phenolphthalein and sodium hydroxide according to the molar ratio of 1:0.32:3.76, now prepare sodium hydroxide into a sodium hydroxide solution with a mass fraction of 6.25%, and then add phenolphthalein and zinc powder to the above sodium hydroxide solution , because phenolphthalein transforms into a quinone structure in an alkaline solution, the above mixed solution is purple. Place the mixed solution in a constant temperature water bath at 60°C and maintain mechanical stirring at 600rpm until the purple color disappears completely, then slowly add dilute hydrochloric acid to obtain a white precipitate, wash it repeatedly with deionized water until the washed out liquid is neutral, and finally put The white precipitate was dried in a vacuum oven at 80°C for 72 hours to obtain the carboxyl-containing monomer phenolphthalein;

[0040] 2) Preparation of hydroquinone and phenolph...

Embodiment 3

[0043] 1) Preparation of carboxyl-containing monomer phenolphthalein:

[0044] Prepare zinc powder, phenolphthalein and sodium hydroxide according to the molar ratio of 1:0.32:3.76, now prepare sodium hydroxide into a sodium hydroxide solution with a mass fraction of 6.25%, and then add phenolphthalein and zinc powder to the above sodium hydroxide solution , because phenolphthalein transforms into a quinone structure in an alkaline solution, the above mixed solution is purple. Place the mixed solution in a constant temperature water bath at 60°C and maintain mechanical stirring at 600rpm until the purple color disappears completely, then slowly add dilute hydrochloric acid to obtain a white precipitate, wash it repeatedly with deionized water until the washed out liquid is neutral, and finally put The white precipitate was dried in a vacuum oven at 80°C for 72 hours to obtain the carboxyl-containing monomer phenolphthalein;

[0045] 2) Preparation of resorcinol and phenolphth...

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Abstract

The invention discloses a preparation method of high-performance carboxyl functionalized poly (arylene ether nitrile). The method comprises the following steps: synthesizing a carboxyl-containing monomer phenolphthalein by taking phenolphthalein and a zinc powder as raw materials, performing stepwise polymerization by virtue of nucleophilic aromatic substitution, and introducing the phenolphthalein structural units into a main chain of the poly (arylene ether nitrile), so as to obtain the high-performance carboxyl functionalized poly (arylene ether nitrile) copolymer. The polymer has a high glass-transition temperature, excellent heat stability and thermo-oxidative stability, high mechanical strength and good solubility in a polar solvent, has strong absorption in an ultraviolet region of280-330nm and also has blue-fluorescence functional characteristics under ultraviolet excitation, so that the poly (arylene ether nitrile) has functional diversity, and the application range of the product is widened. The theoretical direction and technical support are provided for simple and high-efficiency industrial production of the high-performance poly (arylene ether nitrile), the gap of functional development of the poly (arylene ether nitrile) is filled for preparing high-performance reactive functional composite materials, and the preparation method has excellent application prospects.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a preparation method of high-performance carboxyl functionalized polyarylether nitrile. Background technique [0002] Polyarylene ether nitrile (PEN), as a new type of thermoplastic special engineering plastic with excellent comprehensive performance, has excellent characteristics such as high temperature resistance, high mechanical strength, chemical corrosion resistance, creep resistance and good flame retardancy. It has broad application prospects in rail transit, automobile manufacturing, machinery industry and other fields. However, polyarylether nitrile with a rigid structure of all aromatic rings has a high melting temperature and is insoluble in most organic solvents, thus limiting the synthesis, processing and application of polyarylether nitrile. [0003] Chinese patent CN201711354152.1 discloses a high-temperature-resistant, soluble, and flame-retardant fluo...

Claims

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Application Information

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IPC IPC(8): C08G65/40
CPCC08G65/4031C08G65/4093
Inventor 唐海龙直妍杨峻一尹航唐滋励
Owner CHONGQING UNIV OF TECH
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