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A kind of novel aromatic polyimide containing imide flexible group and preparation method thereof

A flexible imide and polyimide technology, applied in the field of new aromatic polyimide and its preparation, can solve the problem of polyimide synthesis steps, cumbersome post-processing, high cost and unfavorable large-scale industrial production and other problems, to achieve the effect of improving organic solubility, reducing conjugation effect, and large steric hindrance

Active Publication Date: 2022-04-01
JIANGSU MO OPTO ELECTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyimide synthesis steps obtained by the above methods are many, the post-treatment process is loaded down with trivial details, and the high cost is not conducive to large-scale industrial production

Method used

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  • A kind of novel aromatic polyimide containing imide flexible group and preparation method thereof
  • A kind of novel aromatic polyimide containing imide flexible group and preparation method thereof
  • A kind of novel aromatic polyimide containing imide flexible group and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1)N 2 Under protection, 3,5-diamino-N-(4'-bromophenyl)-N-(4"-bromobenzyl)benzamide (0.3g, 0.632mmol) was added to a 50ml three-necked flask, 3, 5-Dimethylphenylboronic acid (0.228g, 1.52mmol), Pd(PPh 3 ) 4 (0.0145g, 0.0126mmol), anhydrous potassium carbonate (0.349g, 2.53mmol), then add 15ml of toluene and 7.5ml of distilled water respectively, heat to 110°C, reflux and stir for about 5h, bubbles are constantly generated during the reaction, stir for 5h Finally, close the reaction, let it cool down to room temperature naturally, filter under reduced pressure, separate the obtained filtrate, collect the toluene layer, and remove the solvent toluene by rotary evaporation to obtain a white solid, which is combined with the filter cake and purified by column chromatography. , the solvents used are ethyl acetate and n-hexane, and the polarity ratio is ethyl acetate:n-hexane=5:1, and the resulting product is dried in vacuum at 90°C for 12h to obtain 3,5-diamino-N-(4'-3 ",...

Embodiment 2

[0046] (1)N 2 Under protection, 3,5-diamino-N-(4'-bromophenyl)-N-(4"-bromobenzyl)benzamide (0.3g, 0.632mmol) was added to a 50ml three-necked flask, 3, 5-Dimethylphenylboronic acid (0.228g, 1.52mmol), Pd(PPh 3 ) 4 (0.0145g, 0.0126mmol), anhydrous potassium carbonate (0.349g, 2.53mmol), then add 15ml of toluene and 7.5ml of distilled water respectively, heat to 110°C, reflux and stir for about 5h, bubbles are constantly generated during the reaction, stir for 5h Finally, close the reaction, let it cool down to room temperature naturally, filter under reduced pressure, separate the obtained filtrate, collect the toluene layer, and remove the solvent toluene by rotary evaporation to obtain a white solid, which is combined with the filter cake and purified by column chromatography. , the solvents used are ethyl acetate and n-hexane, and the polarity ratio is ethyl acetate:n-hexane=5:1, and the resulting product is dried in vacuum at 90°C for 12h to obtain 3,5-diamino-N-(4'-3 ",...

Embodiment 3

[0053] (1) Under nitrogen protection, add 3,5-diamino-N-(4′-bromophenyl)-N-(4”-bromobenzyl)benzamide (0.3g, 0.632 mmol), 4-(diphenylamino)phenylboronic acid (0.44g, 1.52mmol), Pd(PPh 3 ) 4 (0.0145g, 0.0126mmol), anhydrous potassium carbonate (0.349g, 2.53mmol), then add 15ml of toluene and 7.5ml of distilled water respectively, heat to 110°C, reflux and stir for about 5h, bubbles are constantly generated during the reaction, stir for 5h Finally, close the reaction, let it cool down to room temperature naturally, filter under reduced pressure, separate the obtained filtrate, collect the toluene layer, and remove the solvent toluene by rotary evaporation to obtain a white solid, which is combined with the filter cake and purified by column chromatography. , the solvents used are ethyl acetate and n-hexane, and the polarity ratio is ethyl acetate:n-hexane=5:1, and the resulting product is dried in vacuum at 90°C for 12h to obtain 3,5-diamino-N-(4'-benzene Base-4"-triphenylamino...

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Abstract

The invention discloses a novel aromatic polyimide containing an imide flexible group and a preparation method thereof. The preparation method is as follows: firstly, 3,5-diamino-N-(4'-R phenyl) ‑N‑(2” / 4”‑R benzyl) benzamide compound reacts with dianhydride monomers to form a viscous polyamic acid solution, which is then diluted, dehydrated, and dried; Aromatic polyimide of asymmetric diamines with flexible groups has good thermal stability, excellent light transmission, film-forming properties, and excellent organic solubility, and can be used in medicine, microelectronics, aerospace and other fields.

Description

technical field [0001] The invention relates to the field of organic synthesis, in particular to a novel aromatic polyimide containing imide flexible groups and a preparation method thereof. Background technique [0002] Aromatic polyimide material (PI) is a kind of polymer material with excellent comprehensive performance and wide application fields. A series of excellent properties such as spectral width and good corrosion resistance have been widely used in many fields such as aviation, aerospace, medicine, and chemical industry. However, due to the rigid structure of its main chain, most polyimides have poor solubility, meltability and processability, and their application fields are greatly limited. [0003] The outstanding comprehensive performance of polyimide material benefits from the strong interaction between its molecular chains and molecular chains, which can make polyimide molecular chains tightly packed, thereby improving its solvent resistance and heat resis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/10
CPCC08G73/1067C08G73/1007
Inventor 沈应中叶青青陶弦沈克成
Owner JIANGSU MO OPTO ELECTRONICS MATERIAL
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