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Soluble polyimide with tert-butyl and triphenylamine structure and preparation method of soluble polyimide

A technology of soluble polyimide and tert-butyl group, which is applied in the field of polyimide, can solve the problems of application limitation, lower glass transition temperature, lower service temperature, etc., and achieve good solubility, good heat resistance, The effect of convenient processing and molding

Active Publication Date: 2015-08-26
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods of improving the thermoplasticity of polyimide often lead to a decrease in its glass transition temperature and a corresponding decrease in its service temperature, so its application is limited

Method used

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  • Soluble polyimide with tert-butyl and triphenylamine structure and preparation method of soluble polyimide
  • Soluble polyimide with tert-butyl and triphenylamine structure and preparation method of soluble polyimide
  • Soluble polyimide with tert-butyl and triphenylamine structure and preparation method of soluble polyimide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment one (synthesis of PI-1):

[0040] The polymerization reaction principle for preparing PI-1 is as follows:

[0041]

[0042] The specific implementation process is as follows:

[0043] Under nitrogen protection, add 554mg (1mmol) of the diamine monomer into a 50mL three-necked round-bottomed flask, then add 5mL of m-cresol and 218mg (1mmol) of PMDA in sequence, drop two drops of isoquinoline, and put Stir the reaction for 12 hours to obtain a viscous reaction solution, then raise the temperature to 120° C. and 150° C. and stir the reaction for 5 hours respectively, and finally raise the temperature to 180° C. and continue to stir the reaction for 15 hours. After the reaction solution was cooled to room temperature, 5 mL of chloroform was added to dilute it, and then slowly poured into 200 mL of rapidly stirring methanol, and a white fibrous solid was precipitated. After suction filtration and vacuum drying at 150°C for 24 hours, PI-1 resin was obtained.

...

Embodiment 2

[0046] Embodiment two (synthesis of PI-2):

[0047] The polymerization reaction principle of preparing PI-2 is as follows:

[0048]

[0049] The specific implementation process is as follows:

[0050] Under the protection of nitrogen, add 554mg (1mmol) of the diamine monomer into a 50mL three-neck round-bottomed flask, then add 5mL of m-cresol and 294mg (1mmol) of BPDA in sequence, drop two drops of isoquinoline, at 85°C Stir the reaction for 12 hours to obtain a viscous reaction solution, then raise the temperature to 120° C. and 150° C. respectively, stir and react for 5 hours, and finally raise the temperature to 180° C. and continue to stir and react for 15 hours. After the reaction solution was cooled to room temperature, 5 mL of chloroform was added to dilute it, and then slowly poured into 200 mL of rapidly stirring methanol, and a white fibrous solid was precipitated. After suction filtration and vacuum drying at 150°C for 24 hours, PI-2 resin was obtained.

[00...

Embodiment 3

[0053] Embodiment three (synthesis of PI-3):

[0054] The polymerization reaction principle of preparing PI-3 is as follows:

[0055]

[0056] The specific implementation process is as follows:

[0057] Under nitrogen protection, add 554mg (1mmol) of the diamine monomer into a 50mL three-neck round-bottomed flask, then add 5mL of m-cresol and 310mg (1mmol) of ODPA in sequence, drop two drops of isoquinoline, and put The reaction was stirred for 12 hours to obtain a viscous solution, and then the temperature was raised to 120° C. and 150° C. respectively, and the reaction was stirred for 5 hours, and finally the temperature was raised to 220° C. and the reaction was continued to stir for 15 hours. After the reaction solution was cooled to room temperature, 5 mL of chloroform was added to dilute it, and then slowly poured into 300 mL of rapidly stirring methanol, and a white fibrous solid was precipitated. After suction filtration and vacuum drying at 150°C for 24 hours, PI...

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Abstract

The invention discloses soluble polyimide with a tert-butyl and triphenylamine structure and a preparation method of soluble polyimide. Polyimide is prepared from diamine monomers with the tert-butyl and triphenylamine structure and aromatic dianhydride monomers through single-step condensation polymerization by adopting isoquinoline or quinoline as a catalyst in a phenol solvent. Polyimide has good heat resistance and excellent solubility, can be dissolved in a low-boiling-point solvent such as chloroform and the like at the room temperature and can be processed and formed at the normal temperature. Polyimide can be taken as a hole-transport material and an electrochromic material for preparing related electronic devices, and has a broad application prospect.

Description

technical field [0001] The invention relates to the technical field of polyimides, in particular to a class of soluble polyimides containing tert-butyl and triphenylamine structures and a preparation method thereof. Background technique [0002] Polyimide is a kind of polymer material with excellent heat resistance. Due to its excellent comprehensive performance, it is widely used in various fields such as aviation, aerospace, electrical, machinery, chemical industry, and microelectronics. Traditional aromatic polyimide is difficult to dissolve in most organic solvents due to its rigid main chain structure, and its melting point is very high or even exceeds its decomposition temperature, so it is difficult to process through conventional molding methods. At present, in industrial production, polyimide is usually synthesized by a "two-step method", that is, the soluble polyamic acid intermediate is synthesized first, and then the corresponding polyimide product is obtained by...

Claims

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Application Information

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IPC IPC(8): C08G73/10C08L79/08
Inventor 伊朗李从严黄卫颜德岳
Owner SHANGHAI JIAO TONG UNIV
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