Preparation method and application of light-cured epoxy polyimide
A technology of epoxy polyimide and polyimide powder, which is applied in the direction of organic chemistry, can solve the problems of oxygen inhibition, molecular oxygen sensitivity, etc., and achieve good thermal stability, simple method, and low dielectric constant. Effect
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Embodiment 1
[0041] Embodiment 1 A kind of preparation method of photocurable epoxy polyimide
[0042] The preparation method specifically includes the following steps:
[0043] (1) 4,4'-diaminodiphenyl ether (1.0012g, 0.005mol) was added to 30mL of N,N-dimethylacetamide, and after stirring at room temperature to dissolve, cis-1,2,3, 6-Tetrahydrophthalic anhydride (1.9779g, 0.013mol) was stirred and dissolved and reacted at room temperature for 6h to obtain a soluble polyamic acid solution;
[0044] (2) 2 mL of isoquinoline and 2 mL of triethylamine were added to 30 mL of polyamic acid solution (30 mL) in step (1), and N 2 , and the reaction was stirred at a constant temperature of 180 °C for 12 h to obtain a polyimide solution. After the reaction, the product was poured into deionized water, and after precipitation, the precipitate was collected by suction filtration, and dried in a vacuum oven for 24 hours to obtain small-molecule polyimide powder;
[0045] The molecular weight of the...
Embodiment 2
[0051] Embodiment 2 A kind of preparation method of photocurable epoxy polyimide
[0052] The preparation method specifically includes the following steps:
[0053] (1) 2,2-bis[4-(4-aminophenoxyphenyl)]propane (2.0526g, 0.005mol) was added to 30mL of N,N-dimethylacetamide, and after stirring and dissolving at room temperature, Then add cis-1,2,3,6-tetrahydrophthalic anhydride (1.9779g, 0.013 mol), stir and dissolve, and react at room temperature for 6h to obtain a soluble polyamic acid solution;
[0054] (2) 2 mL of isoquinoline and 2 mL of triethylamine were added to 30 mL of polyamic acid solution (30 mL) in step (1), and N 2 , and the reaction was stirred at a constant temperature of 180 °C for 12 h to obtain a polyimide solution. After the reaction, the product was poured into deionized water, and after precipitation, the precipitate was collected by suction filtration, and dried in a vacuum oven for 24 hours to obtain small-molecule polyimide powder;
[0055] The molec...
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