Alternating polymers with ammonium and sulfonate zwitterionic groups in the backbone and methods for their preparation
A zwitterion and sulfonate technology, applied in chemical instruments and methods, semi-permeable membrane separation, membrane technology, etc.
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Embodiment 1
[0032] Preparation of Polymer (I-a-1)
[0033]
[0034]Under nitrogen atmosphere, 3.29g (10mmol) bis(4-fluorophenyl)(3'-aminophenyl)phosphine oxide (ABFPPO), 2.28g (10mmol) 3-potassium sulfonate-1,4-terephenyl Phenol (SHQ) and 1.59 g (11.5 mmol) of anhydrous potassium carbonate were added to a 100.0 mL straight three-necked flask equipped with a water separator, a serpentine condenser, a stirrer and an air guide tube, and then 28 mL of N,N- Dimethylacetamide (DMAC) and 14 mL of toluene. Raise the temperature to 160°C, reflux at this temperature with water for 12 h, then drain the toluene through a water separator, rise to 185°C and continue the reaction at this temperature for 3 h to obtain a brown viscous solution. Pour it into deionized water to obtain a pale pink strip polymer, filter it, then soak it in 1M hydrochloric acid aqueous solution at 60-80°C for 5-10 hours, repeat 2-3 times, and then soak it again at 60-80°C Soak in deionized water for 5-10 hours at °C, repe...
Embodiment 2
[0036] Preparation of Polymer (I-a-0)
[0037] Take 2 grams of (I-a-1) to make 20% N-methylpyrrolidone solution (NMP) (w / v), heat to reflux, and keep it for 1 hour, lower the temperature to 120°C, then pour it into deionized In water, a fibrous polymer was obtained, then soaked at 60-80°C for 5-10 hours, repeated 3-5 times, filtered, dried, and vacuum-dried to obtain 1.92 g of polymer (I-a-0) with a yield of 97 %. Intrinsic viscosity: 0.84 dL / g.
Embodiment 3
[0039] Preparation of Polymer (I-a-1)
[0040] Under nitrogen atmosphere, 3.29g (10mmol) bis(4-fluorophenyl)(3'-aminophenyl)phosphine oxide (ABFPPO), 2.28g (10mmol) 3-potassium sulfonate-1,4-terephenyl Phenol (SHQ) and 1.59 g (11.5 mmol) of anhydrous potassium carbonate were added to a 100.0 mL straight three-necked flask equipped with a water separator, a serpentine condenser, a stirrer and an air duct, and then 28 mL of NMP and 14 mL of toluene. Raise the temperature to 160°C, reflux at this temperature with water for 12 h, drain the toluene through a water separator, raise to 195°C and continue the reaction at this temperature for 3 h to obtain a brown viscous solution. Pour it into deionized water to obtain a pale pink strip polymer, filter it, then soak it in 1M hydrochloric acid aqueous solution at 60-80°C for 5-10 hours, repeat 2-3 times, and then soak it again at 60-80°C Soak in deionized water for 5-10 hours at °C, repeat 3-5 times, filter, dry, and vacuum-dry to ob...
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