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Polyimide containing pyridine quaternary ammonium salt structure, preparation method of polyimide, transparent polyimide film and preparation method of transparent polyimide film

A technology of transparent polyimide and pyridine quaternary ammonium salt, applied in the field of polymer materials, can solve the problem of low glass transition temperature of polyimide film, poor heat resistance of polyimide, low visible light transmittance, etc. problem, to achieve the effect of reducing charge transfer effect, improving transparency, and excellent optical performance

Active Publication Date: 2022-06-07
SHENZHEN HUAKE COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional high-temperature-resistant fully aromatic polyimide materials, due to the presence of charge transfer complexes (CTC) formed by intramolecular and intermolecular charge transfer complexes, make polyimide films generally appear light yellow to dark brown with low visible light transmission
The color of semi-aromatic polyimide and fully aliphatic polyimide is light or close to colorless, but usually the heat resistance of this type of polyimide is poor
People usually use methods such as increasing steric hindrance and introducing flexible segments to improve the light transmittance of the film from the molecular structure design, and obtain a colorless and highly transparent film, but the glass transition temperature of the polyimide film prepared by this method Low (<300°C), insufficient mechanical strength

Method used

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  • Polyimide containing pyridine quaternary ammonium salt structure, preparation method of polyimide, transparent polyimide film and preparation method of transparent polyimide film
  • Polyimide containing pyridine quaternary ammonium salt structure, preparation method of polyimide, transparent polyimide film and preparation method of transparent polyimide film
  • Polyimide containing pyridine quaternary ammonium salt structure, preparation method of polyimide, transparent polyimide film and preparation method of transparent polyimide film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A polyimide containing a pyridine quaternary ammonium salt structure has a structure as shown in formula 1.1:

[0038]

[0039] The preparation method is as follows: 14.39g (50mmol) 3,6-diamino-2,7,10-trimethylacridine-10-ammonium chloride, 19.21g (50mmol) 5,11-difluoro-5,11 -Dimethyl-5,11-dihydroanthracene[2,3-c:6,7-c']difuran-1,3,7,9-tetraone with 0.7ml isoquinoline, 45ml m-cresol Mix well with 300ml N,N-dimethylformamide, stir at room temperature for 3h to fully dissolve, heat to 210°C for polycondensation reaction, react for 16h to obtain a polycondensation reaction solution; then add 1000ml methanol to the obtained polycondensation reaction solution, The solid was precipitated, filtered with suction, the solid product was washed three times with deionized water, and finally vacuum-dried at 180° C. for 12 h to obtain polyimide powder.

[0040] In this example, the diamine monomer 3,6-diamino-2,7,10-trimethylacridine-10-ammonium chloride has the structure shown i...

Embodiment 2

[0048] A polyimide containing a pyridine quaternary ammonium salt structure has a structure as shown in formula 2.1:

[0049]

[0050] The preparation method is as follows: 22.77g (50mmol) 3,6-diamino-2,7,10-trimethyl-9-phenylacridine-10-ammonium iodide, 22.21g (50mmol) 2,2'- Bis(3,4-dicarboxylic acid)hexafluoropropane dianhydride was mixed with 0.7ml isoquinoline, 45ml m-cresol and 300ml N,N-dimethylformamide, stirred at room temperature for 3h to fully dissolve, and then heated to The polycondensation reaction was carried out at 220 °C for 17 h to obtain a polycondensation reaction solution; then 1000 ml of methanol was added to the obtained polycondensation reaction solution to precipitate a solid, suction filtration, and the solid product was washed three times with deionized water, and finally vacuum-dried at 190 °C for 10 hrs. hours to obtain polyimide powder.

[0051] In this example, the diamine monomer 3,6-diamino-2,7,10-trimethyl-9-phenylacridine-10-ammonium iodi...

Embodiment 3

[0058] A polyimide containing a pyridine quaternary ammonium salt structure has a structure as shown in formula 3.1:

[0059]

[0060] The preparation method is as follows: 20.82g (50mmol) 3,6-diamino-2,7-di-tert-butyl-10-methylacridine-10-ammonium bromide, 26.02g (50mmol) 5,5'-( (Propane-2,2-diylbis(4,1-phenylene))bis(oxy)bis(isobenzofuran-1,3-dione) with 0.7ml isoquinoline, 45ml m-cresol Mix well with 300ml N,N-dimethylformamide, stir at room temperature for 3h to fully dissolve, then heat to 240°C for polycondensation reaction, react for 18h to obtain a polycondensation reaction solution; then add 1000ml methanol to the obtained polycondensation reaction solution, The solid was precipitated, filtered with suction, the solid product was washed three times with deionized water, and finally vacuum-dried at 200° C. for 14 hours to obtain polyimide powder.

[0061] In this example, the diamine monomer 3,6-diamino-2,7-di-tert-butyl-10-methylacridine-10-ammonium bromide has th...

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Abstract

The invention relates to the technical field of high polymer materials, in particular to polyimide containing a pyridine quaternary ammonium salt structure, a preparation method of the polyimide, a transparent polyimide film and a preparation method of the transparent polyimide film, the polyimide containing the pyridine quaternary ammonium salt structure has the chemical structure shown in the formula I, X <-> is one or more selected from F <->, Cl <->, Br <-> and I <->; r1 and R3 are independently selected from alkyl with the carbon atom number of 1-5, and R2 is selected from hydrogen atom or phenyl; ar is a group selected from the following groups: wherein n is 50-150. According to the transparent polyimide film prepared by the preparation method disclosed by the invention, an aromatic heterocyclic structure containing pyridine quaternary ammonium salt is introduced into a diamine monomer, so that the planarity of a condensed ring is enhanced, charge transfer among molecules is weakened, the linear expansion coefficient is 10.9-18.9 ppm / K, the visible light transmittance at 550nm is 85-92%, the glass-transition temperature is 382-410 DEG C, and the thermodynamic property and the optical property are excellent; the method can be applied to the photoelectric fields of flexible transparent display substrate materials, optical transparent films or solar cell substrates and the like.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polyimide containing a pyridine quaternary ammonium salt structure and a preparation method thereof, and a transparent polyimide film and a preparation method thereof. Background technique [0002] With the rapid development of the electronic field, people have higher and higher requirements for the use of various electronic components. Flexible electronic products are light, bendable and even foldable, and are believed to gradually replace traditional electronic devices and become mainstream products. The research and development of various key materials related to flexible electronic products is an important support for the development of this industry. Among them, flexible substrates are an important material for realizing device flexibility, which plays an important role in protecting and supporting flexible devices. [0003] Flexible substrate materials require g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C08J5/18C08L79/08
CPCC08G73/1067C08G73/1085C08G73/1039C08G73/1028C08G73/1071C08J5/18C08J2379/08Y02E10/549
Inventor 凌欢曾西平
Owner SHENZHEN HUAKE COMM TECH CO LTD
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