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

A polymer, soluble technology, applied in the field of preparation of new soluble heat-resistant polymers, can solve the problems of single processing method, poor solubility, and the transparency needs to be further improved, and achieve the effect of low reaction temperature and mild reaction conditions

Inactive Publication Date: 2014-07-30
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] A 100 mL three-necked flask was selected as the reaction vessel, and the three-necked flask was evacuated and filled with nitrogen for three times. Add 2.66g of 4-oxindole, 4.36g of 4,4-difluorobenzophenone and 5.52g of anhydrous potassium carbonate in sequence in a three-necked flask, then add 20mL of 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; then the temperature was raised to 190°C and continued to react for 3 hours, the viscosity of the system increased significantly, and the reaction was stopped. Allow the reaction system to cool slowly to room temperature, and then pour it into deionized water for precipitation to obtain a crude product of indole skeleton polymer. The crude polymer product was extracted with methanol for 24 h, and then dried in a vacuum oven at 100 °C for 8 h to obtain the target polymer I.

[0022]

...

Embodiment 2

[0025] A 100 mL three-necked flask was selected as the reaction vessel, and the three-necked flask was evacuated and filled with nitrogen for three times. Add 2.66g of 4-oxindole, 5.08g of 4,4-difluorodiphenyl sulfone and 5.52g of anhydrous potassium carbonate in sequence in a three-necked flask, then add 20mL of solvent N-methylpyrrolidone, and use mechanical stirring to make the reaction single The body is fully dissolved in the solvent. The system was slowly heated to 160°C and reacted for 1 h; then raised to 180°C and continued to react for 2 h, the viscosity of the system increased significantly, and the reaction was stopped. Allow the reaction system to cool slowly to room temperature, and then pour it into deionized water for precipitation to obtain a crude product of indole skeleton polymer. The crude polymer product was extracted with methanol for 24 h, and then dried in a vacuum oven at 100 °C for 8 h to obtain the target polymer II.

[0026]

[0027] The polym...

Embodiment 3

[0029] A 100 mL three-necked flask was selected as the reaction vessel, and the three-necked flask was evacuated and filled with nitrogen for three times. Add 2.66g of 4-oxindole, 6.44g of 1,3-bis-(4-fluorobenzoyl)benzene and 5.52g of anhydrous potassium carbonate in sequence in a three-necked flask, then add 20mL of solvent N-methylpyrrolidone, using Mechanical stirring allows the reactive monomers to fully dissolve in the solvent. The system was slowly heated to 160°C and reacted for 1 h; then raised to 180°C and continued to react for 2 h, the viscosity of the system increased significantly, and the reaction was stopped. Allow the reaction system to cool slowly to room temperature, and then pour it into deionized water for precipitation to obtain a crude product of indole skeleton polymer. The crude polymer product was extracted with methanol for 24 h, and then dried in a vacuum oven at 100 °C for 8 h to obtain the target polymer III.

[0030]

[0031] The polymer has ...

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Abstract

The invention relates to a method for preparing a soluble heat-resistant polymer based on an indole skeleton. The general structural formula of the polymer is: The invention relates to a method for preparing a soluble heat-resistant polymer based on an indole skeleton. Including: using aromatic difluoro compounds of different structures and 4-oxindole as monomers, N-methylpyrrolidone as a solvent, and heating in the presence of potassium carbonate to obtain soluble heat-resistant polymers based on indole skeletons of different structures. The polymer prepared by the present invention has high glass transition temperature and thermal decomposition temperature, excellent mechanical properties, simple process operation, and low preparation cost; in addition, the polymer shows good solubility and can be dissolved in N-formazol in ylpyrrolidone, N,N-dimethylformamide, N,N-dimethylacetamide, sulfolane, dimethylsulfoxide 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 Patents(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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