Aromatic hyperbranched polyimide containing anthracene structure and its preparation method and application
A polyimide, chemical imidization technology, applied in the field of material science, can solve the problems of decreased heat resistance, limited wide application, large distance between chains, etc., and achieves improved heat resistance, good application prospects and conditions. less demanding effects
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Embodiment 1
[0038] Add 0.4362g (2mmol) of pyromellitic dianhydride (PMDA) and 36ml of N,N-dimethylformamide into a three-necked flask, blow in argon, raise the temperature to 30°C, and add the triamine monomer N 1 -(4-aminophenyl)-N 1 -(9-(4-aminophenyl)anthracen-2-yl)benzene-1,4-diamine 0.4666g (1mmol) dissolved in 40ml of N,N-dimethylformamide with a constant pressure dropping funnel in 1 ~ 2h Add it dropwise into a three-necked flask, then continue to react for 13h, then add 6ml of acetic anhydride and 2ml of triethylamine, heat up to 45°C and continue to react for 12h, after the reaction is completed, cool to room temperature and discharge in methanol, filter, wash, repeat 2-3 Finally, place it in a vacuum drying oven at 80°C for 24 hours to obtain a reddish-brown hyperbranched polyimide polymer, whose structural formula is as follows:
[0039]
Embodiment 2
[0041] Add 0.903g (4.14mmol) of pyromellitic dianhydride (PMDA) and 2ml of N,N-dimethylacetamide into a three-necked flask, blow in argon, raise the temperature to 30°C, and add the triamine monomer N 1 -(4-aminophenyl)-N 1 -(10-(4-aminophenyl)anthracen-9-yl)benzene-1,4-diamine 0.9332g (2mmol) dissolved in 3ml N,N-dimethylacetamide with a constant pressure dropping funnel in 1 ~ 2h Add it dropwise into a three-necked flask, then continue to react for 16 hours, then add 12.4ml of acetic anhydride and 4.2ml of triethylamine, heat up to 45°C and continue to react for 13 hours, after the reaction is completed, cool to room temperature and discharge in ethanol, filter, wash, repeat 2 ~3 times, and finally placed in a vacuum drying oven at 80°C for 24 hours to obtain a light yellow hyperbranched polyimide polymer, whose structural formula is as follows:
[0042]
Embodiment 3
[0044] Add 0.4413g (1.5mmol) of 3,3',4,4'--biphenyltetracarboxylic dianhydride (BPDA) and 10ml of N-methylpyrrolidone into a three-necked flask, pass in argon, raise the temperature to 30°C, and Triamine Monomer N 2 -(9-(4-aminophenyl)anthracen-2-yl)-N 2 -(5-aminothiophen-2-yl)thiophene-2,5-diamine 0.4786g (1mmol) dissolved in 8ml of N-methylpyrrolidone was added dropwise into the three-necked flask with a constant pressure dropping funnel in 1~2h, and then continued to react for 24h , then add 12ml of acetic anhydride and 3ml of triethylamine, raise the temperature to 45°C and continue the reaction for 24h, after the reaction is completed, cool to room temperature and discharge the material in methanol, filter, wash, repeat 2-3 times, and finally place in a vacuum oven at 80°C Dry 24h in middle, obtain brown hyperbranched polyimide polymer, its structural formula is as follows:
[0045]
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