Preparation method of polymer anion exchange membrane
An anion exchange membrane and polymer technology, which is applied in the field of preparation of polymer anion exchange membranes, can solve problems such as the decline in mechanical properties, achieve the effects of reducing hazards, simple methods, and improving reaction efficiency
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[0020] Example 1:
[0021] Step 1. Monomer polymerization: Dissolve 1 mol of 4,4'-difluorobenzophenone, 1 mol of o-methyl hydroquinone and 1.1 mol of potassium carbonate in 1.75 liters of N-methylpyrrolidone and 850 ml The reaction solution is formed in the mixed solvent of toluene, the reaction solution is stirred and reacted at 140°C for 0.5h, then the reaction temperature is raised to 170°C, and then stirred for 4h, and then the high temperature reaction mixture after the reaction is completed Cool to room temperature, dilute with 4 liters of tetrahydrofuran, filter, add 100 ml of acetic acid to the filtered mixture and pour it into methanol, wait until a white lumpy precipitate precipitates, filter the precipitated white lumpy precipitate with A large amount of methanol is boiled and washed twice and then dried in vacuum to obtain a powdery polymer containing methyl groups;
[0022] Step 2. Bromination of polymer: Dissolve 1 mol of methyl-containing polymer, 0.5 mol of bromosu...
Example Embodiment
[0031] Example 2:
[0032] Step 1. Monomer polymerization: Dissolve 1 mol of 4,4'-difluorobenzophenone, 1 mol of 2,4-dimethyl-1,4-benzenediol and 1.2 mol of potassium carbonate in 2 liters of N-methylpyrrolidone and 800 ml of toluene mixed solvent to form a solution to be reacted. The solution to be reacted was stirred and reacted at a temperature of 150°C for 2h, and then the reaction temperature was increased to 190°C, and then stirred and reacted for 6h. After the reaction, the high-temperature reaction mixture was cooled to room temperature, diluted with 6 liters of tetrahydrofuran, filtered, and 110 ml of acetic acid was added to the filtered mixture and poured into methanol. When a white lump precipitate was deposited, the white precipitate After filtering out the lumpy precipitate, it is boiled and washed twice with a large amount of methanol and then dried in a vacuum to obtain a powdery polymer containing methyl groups;
[0033] Step 2. Bromination of polymer: Dissolve 1 ...
Example Embodiment
[0042] Example 3:
[0043] Step 1. Monomer polymerization: Dissolve 1 mol of 4,4'-difluorobenzophenone, 1 mol of 2,6-dimethyl-1,4-benzenediol and 1.15 mol of potassium carbonate in 2.5 liters N-methylpyrrolidone and 900 ml of toluene mixed solvent form a solution to be reacted. The solution to be reacted is stirred and reacted at a temperature of 145°C for 2 hours, and then the reaction temperature is increased to 180°C, and then stirred and reacted for 5 hours. After the reaction, the high-temperature reaction mixture was cooled to room temperature, diluted with 5 liters of tetrahydrofuran, filtered, and 90 ml of acetic acid was added to the filtered mixture and poured into methanol. When a white lumpy precipitate precipitated, the white precipitate After filtering out the lumpy precipitate, it is boiled and washed twice with a large amount of methanol and then dried in a vacuum to obtain a powdery polymer containing methyl groups;
[0044] Step 2. Bromination of polymer: Dissolv...
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