Polyimide and its preparation method and flexible OLED panel
A polyimide and panel technology, applied in the field of OLED materials, can solve problems such as deep color, thermal performance and mechanical performance degradation, and limit the wide application of polyimide
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Embodiment 1
[0036] Example 1: Preparation of polyimide 1, the structural formula is as follows:
[0037]
[0038] The synthetic route is as follows:
[0039]
[0040] The synthetic steps are as follows:
[0041] 1. Under the protection of argon, Compound A1 (10 mol), dibutyltin (6 mol) is added to the reaction apparatus, and then dissolve anhydrous acetic acid. After the solid is dissolved, the compound B1 is slowly added (11mol The reaction was then reacted at a rotational speed of 200 rpm, and the reaction was completed, cooled to room temperature, and then adjusted PH = 12 with a NaOH solution, and washed a large amount of gray precipitated. After washing with distilled water, the filter cake was stored in a vacuum drying box. 60 ° C was dried for 8h, and tetrahydrofuran (THF) was added to the dried filter cake and stirred for 15 min, and the brown filtrate was filtered, and the filtrate was subjected to a gray solid, re-use ethanol / water (volume ratio 1: 1), Nitrogen gas was recryst...
Embodiment 2
[0047] Example 2: Preparation of polyimide 2, the structural formula is as follows:
[0048]
[0049] The synthetic route is as follows:
[0050]
[0051] The synthetic steps are as follows:
[0052] 1. Under the protection of argon, Compound A2 (10 mol), dibutyltin (5 mol) is added to the reaction apparatus, and then dissolved in anhydrous acetic acid. After the solid is dissolved, the compound B2 is slowly added (15 mol The reaction was then reacted at a rotational speed of 400 rpm, the reaction was completed, cooled to room temperature, and then adjusted pH = 13 with a NaOH solution, a large amount of gray precipitated, washed with distilled water, and filtered filtered filtration, put it into a vacuum drying box 60 ° C was dried for 10 h, and tetrahydrofuran (THF) was added to the dried filter cake and stirred for 15 min, and the brown filtrate was filtered, and the filtrate was subjected to a mixed solvent to obtain a gray solid, re-use ethanol / water (volume ratio 9: 1)...
Embodiment 3
[0058] Example 3; Preparation of polyimide 3, structure formula as follows:
[0059]
[0060] The synthetic route is as follows:
[0061]
[0062] The synthetic steps are as follows:
[0063] 1. Under the protection of argon, Compound A3 (15 mol), dibutyltin (7 mol) is added to the reaction apparatus, and then dissolve it, then dissolve it. After the solid is dissolved, the compound B3 is slowly added (10 mol The reaction was then reacted at a rotational speed of 500 rpm, and the reaction was completed, cooled to room temperature, and then adjusted pH = 12.5 with a NaOH solution, a large amount of gray precipitation, washed with distilled water, and filtered filtered cake, put it in a vacuum drying box 60 ° C was dried for 9 h, and tetrahydrofuran (THF) was added to the dried filter cake and stirred for 15 min, and the brown filtrate was filtered to give the liquid, and the filtrate was used to obtain a gray solid, and ethanol / water (a volume ratio 1: 9) is again. Nitrogen g...
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