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Preparation method of soluble heat-resistant polymer based on benzpyrole skeleton

A polymer and soluble technology, which is applied in the field of preparation of new soluble heat-resistant polymers, can solve the problems of poor solubility, single processing method, and low glass transition temperature, and achieve mild reaction conditions and low reaction temperature.

Inactive Publication Date: 2013-05-08
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyether ether ketone is a semi-crystalline material, and the transparency needs to be further improved; the glass transition temperature is low, only 143 ° C, and the melting point is higher than 340 ° C; in addition, the solubility of the polymer in organic solvents is poor. Melt processing molding, the processing method is relatively simple

Method used

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  • Preparation method of soluble heat-resistant polymer based on benzpyrole skeleton
  • Preparation method of soluble heat-resistant polymer based on benzpyrole skeleton
  • Preparation method of soluble heat-resistant polymer based on benzpyrole skeleton

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Choose a 100 mL three-necked flask as the reaction vessel, vacuum and fill the three-necked flask with nitrogen, repeat three times. Add 2.66g 4-hydroxyindole, 4.36g 4,4-difluorobenzophenone and 5.52g anhydrous potassium carbonate in a three-necked flask, then add 20mL solvent N-methylpyrrolidone, and use mechanical stirring to make the reaction The monomer is fully dissolved in the solvent. The system was slowly heated to 160°C and reacted for 1 hour; the temperature was increased to 190°C and the reaction continued for 3 hours. The viscosity of the system increased significantly and the reaction was stopped. The reaction system was slowly cooled to room temperature, and then poured into deionized water for precipitation to obtain a crude product of indole skeleton polymer. The crude polymer product was extracted with methanol for 24 hours, and then dried in a vacuum drying oven at 100°C for 8 hours to obtain the target polymer I.

[0022]

[0023] This is an amorphous...

Embodiment 2

[0025] Choose a 100 mL three-necked flask as the reaction vessel, vacuum and fill the three-necked flask with nitrogen, repeat three times. In a three-necked flask were sequentially added 2.66g 4-hydroxyindole, 5.08g 4,4-difluorodiphenyl sulfone and 5.52g anhydrous potassium carbonate, and then added 20mL solvent N-methylpyrrolidone, using mechanical stirring to make the reaction The body is fully dissolved in the solvent. The system was slowly heated to 160°C and reacted for 1 h; then the temperature was increased to 180, and the reaction continued for 2 h. The viscosity of the system increased significantly and the reaction was stopped. The reaction system was slowly cooled to room temperature, and then poured into deionized water for precipitation to obtain a crude product of indole skeleton polymer. The crude polymer product was extracted with methanol for 24 hours, and then dried in a vacuum drying oven at 100°C for 8 hours to obtain the target polymer II.

[0026]

[0027...

Embodiment 3

[0029] Choose a 100 mL three-necked flask as the reaction vessel, vacuum and fill the three-necked flask with nitrogen, repeat three times. In a three-necked flask were sequentially added 2.66g 4-hydroxyindole, 6.44g 1,3-bis-(4-fluorobenzoyl)benzene and 5.52g anhydrous potassium carbonate, and then added 20mL of solvent N-methylpyrrolidone, using The mechanical stirring makes the reaction monomer fully dissolved in the solvent. The system was slowly heated to 160°C and reacted for 1 h; then the temperature was increased to 180, and the reaction continued for 2 h. The viscosity of the system increased significantly and the reaction was stopped. The reaction system was slowly cooled to room temperature, and then poured into deionized water for precipitation to obtain a crude product of indole skeleton polymer. The crude polymer product was extracted with methanol for 24 hours, and then dried in a vacuum drying oven at 100°C for 8 hours to obtain the target polymer III.

[0030] ...

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Abstract

The invention relates to a preparation method of a soluble heat-resistant polymer based on a benzpyrole skeleton. The structural general formula of the polymer is shown in the specification. The preparation method comprises the steps of taking aromatic bifluoride of different structures and 4-oxyindole as monomer and N-methyl pyrrolidone as a solvent, and heating under condition of existence of potassium carbonate so as to obtain soluble heat-resistant polymer of different structures based on the benzpyrole skeleton. The polymer prepared by the method has higher glass transition temperature and thermal decomposition temperature, excellent mechanical property, simple operation processes and lower preparation cost, furthermore, the polymer has good dissolving property and can be dissolved in the N-methyl pyrrolidone, N,N-dimethylformamide, N,N-dimethylacetamide, sulfolane, dimethyl sulfoxide and chloroform.

Description

technical field [0001] The invention relates to a soluble heat-resistant polymer and a preparation method thereof, more specifically, the invention relates to a preparation method of a novel soluble heat-resistant polymer based on an indole skeleton. Background technique [0002] High-performance polymers are considered to be a class of highly valuable polymer materials. Due to their remarkable physical and chemical properties, they can be used in industries such as automobiles, aircraft, and aerospace, as well as in the pharmaceutical industry. However, due to the high production cost of such polymers, only a very small number of them have been commercialized. Polyether ether ketone is a traditional special engineering material with excellent comprehensive performance and is widely used. However, polyether ether ketone is a semi-crystalline material, and the transparency needs to be further improved; the glass transition temperature is low, only 143 ° C, and the melting po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/06C08G75/23
Inventor 常冠军杨莉杨军校黄亚文曹克张林林润雄
Owner SOUTHWEAT UNIV OF SCI & TECH
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