Efficient preparation method of phosphonic acid polymer and application of phosphonic acid polymer in high-temperature fuel cell
A polymer, phosphonylation technology, applied in fuel cells, circuits, electrical components, etc., can solve the problems of low molecular weight, poor mechanical properties, and poor film-forming properties of phosphonylated polymers
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Embodiment 1
[0026] Preparation of Phosphonated Polytriphenyl Sulfone (P-PTPSU):
[0027] (1) Preparation of brominated difluorodiphenyl sulfone (DBDFDPS) monomer:
[0028]
[0029] At room temperature under nitrogen atmosphere, 25.41 g of 4,4'-difluorodiphenylsulfone (DFDPS) was mixed with 150 mL of concentrated H 2 SO 4Mix and stir until homogeneous, and slowly add 14.13 g of N-bromosuccinimide (NBS) to the reaction system in three batches (within 15 min). The mixture was stirred at room temperature for 8 hours. After the reaction was completed, the reaction solution was slowly poured into ice water (about 500 g) under stirring, and then settled overnight and filtered. The filter cake was washed three times with water, and then dissolved in chloroform, followed by water, saturated Na 2 CO 3 The solution and saturated NaCl solution were washed 3-4 times each, and finally washed with anhydrous MgSO 4 Dry overnight, filter off MgSO 4 Then, the solvent was removed in vacuo to obtain...
Embodiment 2
[0040] Preparation of Phosphonated Polysulfone (P-PSU)
[0041] (1) preparation of bromo-PSU:
[0042]
[0043] The preparation of brominated difluorodiphenyl sulfone (DBDFDPS) monomer is as in Example 1. Before starting the reaction, the raw materials were pretreated, and DBDFDPS and bisphenol A were dried in a vacuum oven at 55 °C for 12 h. 2 CO 3 Dry in a vacuum oven at 120°C for 12h. Under nitrogen (99.999%, flow rate: 10-15 mL / min) atmosphere, 2.07 g (5 mmol) DBDFDPS and 1.14 g (5 mmol) bisphenol A (BPA) were added in an equimolar ratio to a water separator and a serpentine condenser tube. , elbow, stirring paddle and air tube 100mL straight three-necked flask, then 10.5mL N,N-dimethylacetamide (DMAc), 5mL toluene (Tol), 0.79g (5.75 mmol) anhydrous potassium carbonate was added in. DMAc is used as a solvent, anhydrous potassium carbonate is used as a catalyst, and toluene is used as a water separator. After the mixture is completely dissolved, the temperature is r...
Embodiment 3
[0051] Preparation of Phosphonated Polyethersulfone (P-PES):
[0052] (1) preparation of bromo-PES:
[0053]
[0054] Before starting the reaction, the raw materials were pretreated, and DBDFDPS and dihydroxybenzophenone were placed in a vacuum oven at 55 °C for 12 h. 2 CO 3 Dry in a vacuum oven at 120°C for 12h. Under the atmosphere of nitrogen (99.999%, flow rate: 10-15mL / min), 4.14g (10mmol) DBDFDPS and 2.14g (10mmol) dihydroxybenzophenone were added to a water separator and a serpentine condenser tube according to an equimolar ratio. , elbow, stirring paddle and air tube 100mL straight three-necked flask, then 21mL N,N-dimethylacetamide (DMAc), 10.5mL toluene (Tol), 1.59g (11.5mmol) anhydrous potassium carbonate was added to it . DMAc was used as a solvent, anhydrous potassium carbonate was used as a catalyst, and toluene was used as a water separator. After the mixture was completely dissolved, the temperature was raised to 165°C (oil bath temperature), and the tol...
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