TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Property: Sodium hydride has purity of 95%.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (claimed): 7 g of 5-methoxyresorcinol and 200 mL of dimethyl sulfoxide are added to 500mL three-necked flask, hydroquinone is added, stirred, and oil decompression is carried out for 30 minutes. Nitrogen gas is purged to the solution for 30 minutes, oxygen is removed in the solution, 48.9 g cesium carbonate is added under nitrogen protection, nitrogen gas is bubbled to the solution for 30 minutes, 38.9 g 1,2-dibromotetrafluoroethane is added, heated to 50 degrees C, and stirred for 2 days. The reaction mixture is transferred to 1L beaker, cooled to room temperature, 200 ml water is added, stirred for 10 minutes, 100 mL dichloromethane is then added, organic phase is separated, washed 3 times, with 50 ml water, aqueous phase is combined, extracted 3 times with 50 ml n-hexane, and organic phase is combined. The resulting mixture is dried using anhydrous magnesium sulfate, filtered, solvent is removed from the resulting mixture, and the remaining liquid is purified by column chromatography (A) to obtain 15.1 g colorless transparent liquid of intermediate compound (I). 60 mL 1M dichloromethane solution of boron tribromide is added to a solution of 10 g of intermediate compound (I) dissolved in 50 mL dichloromethane in nitrogen atmosphere at 0 degrees C, the resulting mixture is heated to room temperature, stirred at room temperature for 48 hours, 50 ml water is added, aqueous phase is separated, mixture is washed 2 times with dichloromethane, organic phase is combined, washed with 10 ml aqueous sodium bicarbonate having concentration of 5%, organic phase is combined, and washed with 10 ml water. The organic phase is dried in anhydrous magnesium sulfate, filtered, solvent is removed from the resulting mixture, and the remaining liquid is purified by column chromatography (B) to obtain 9.3 g colorless transparent liquid of intermediate compound (II). 3.28 g Sodium hydride is added to 30 g tripropylene glycol dissolved in 200 mL tetrahydrofuran at 0 degrees C in nitrogen atmosphere, stirred for 1 hour, 14.9 g propargyl bromide is injected into the reaction flask, stirred for 0 degrees C for 2 hours, the resulting mixture is poured into water, extracted with dichloromethane, organic phase is separated and dried using anhydrous sodium sulfate. The resulting mixture is filtered, solvent is removed, and crude product is separated and purified by column chromatography (C) to obtain 12.05 g yellow oil of intermediate compound (III). 20.82 g p-Toluenesulfonyl chloride is added to 10.28 g intermediate compound (III) at 0 degrees C in nitrogen atmosphere, 19 ml triethylamine and 0.522 g trimethylamine hydrochloride salt dissolved in 140 ml acetonitrile, stirred at 0 degrees C for 1 hour, the resulting mixture is poured into water, extracted with ethyl acetate, organic phase is dried in anhydrous magnesium sulfate, filtered, solvent is removed, and crude product is purified by column chromatography (D) to obtain 16.19 g yellow oil of intermediate compound (IV). 3.42g Intermediate compound (IV) and azidomethyl pivalate was added to 20 ml mixed solution of tetrahydrofuran and water in a volume ratio of 1:1, stirred for 30 minutes, 0.125 g copper sulfate pentahydrate is added, 0.594g of sodium ascorbate is added to resulting mixture, and stirred at room temperature for 48 hours. The resulting mixture is diluted with 20 mL water, extracted with 20 ml ethyl acetate, organic phase is combined, washed with 10 ml water, and then washed with 10 ml saturated brine. The resulting organic phase is dried using anhydrous magnesium sulfate, filtered, solvent is removed, and residue is purified by column chromatography (E) to obtain 4.64 g colorless oil of intermediate compound (V). 4.84 g Intermediate compound (II), 4.99 g intermediate compound (V), 2.76 g anhydrous potassium carbonate, and 50 mL acetonitrile are mixed, mixture is heated for 48 hours, solvent is removed, resulting residue is poured into water, extracted with ethyl acetate, aqueous phase is washed with 10 ml ethyl acetate, organic phase is combined, washed with 10 ml water and 10 ml saturated brine solution, dried using anhydrous magnesium sulfate, filtered, solvent is removed, and residue is purified by column chromatography (F) to obtain 7.04 g colorless oil of intermediate compound (VI). 8.09 g Intermediate compound (VI), 1.95 g zinc particles, and 30 ml acetonitrile are added, heated for 48 hours, filtered, solvent is removed from the filtrate, and residue is purified by column chromatography (G) to obtain 4.38 g colorless oil of intermediate compound (VII). 5.69 g Intermediate compound (VII) added to 50 mL dry three-necked round-bottomed flask, frozen in liquid nitrogen, resulting mixture is placed in oil bath at 180 degrees C, heated for 12 hours, and cooled to room temperature. The resulting mixture is dissolved in 10 ml chloroform, n-hexane is added, precipitate is filtered, washed 3 times with 10 ml n-hexane, and the filter cake is vacuum-dried at 60 degrees C for 12 hours to obtain 5.18 g methyl pivalate-protected perfluorocyclobutyl polyarylene ether. 1 ml Aqueous sodium hydroxide solution is added to 10 ml methanol solution of 3.54 g methyl pivalate-protected perfluorocyclobutyl polyarylene ether, stirred at room temperature for 12 hours, 5 ml water is added, filtered, and filter cake is vacuum-dried at 80 degrees C for 24 hours to obtain 2.58 g white solid of 1H-1,2,3-triazole group-containing perfluorocyclobutyl polyarylether polymer. Preferred Composition: The content of propargyl bromide is 80%. The volume ratio of ethyl acetate and n-hexane in column chromatography (A) is 1:6. The volume ratio of ethyl acetate and n-hexane in column chromatography (B) is 3:2. The volume ratio of ethyl acetate and n-hexane in column chromatography (C) is 1:3. The volume ratio of ethyl acetate and n-hexane in column chromatography (D) is 1:3. The volume ratio of ethyl acetate and n-hexane in column chromatography (E) is 7:2. The volume ratio of ethyl acetate and n-hexane in column chromatography (F) is 3:1.