Anion-conducting polymer, composition, and membrane
View Patent ↗Anion-conducing polymers and membranes with enhanced stability to aqueous alkali include a polymer backbone with attached sulfonium, phosphazenium, phosphazene, and guanidinium residues. Compositions also with enhanced stability to aqueous alkali include a support embedded with sulfonium, phosphazenium, and guanidinium salts.
1. A polymer of the formula
wherein n is any integer greater than 1; wherein Z is NR 1 R 2 or N(═PZ 3 ); and
wherein R 1 and R 2 are independently selected from C 1 to C 10 alkyl, C 1 to C 10 partially fluorinated alkyl, or C 1 to C 10 fluorinated alkyl, and also wherein R 1 and R 2 may together form a —(CH 2 ) 2 —, —(CH 2 ) 3 —, —(CH 2 ) 4 —, —(CH 2 ) 5 —, —CH═CH—,
or —CH═CH—CH═CH—.
2. A polymeric reaction product of water and a polymer of the formula
wherein n is any integer greater than 1; wherein Z is NR 1 R 2 or N(═PZ 3 ); and
wherein R 1 and R 2 are independently selected from C 1 to C 10 alkyl, C 1 to C 10 partially fluorinated alkyl, or C 1 to C 10 fluorinated alkyl, and also wherein R 1 and R 2 may together form a —(CH 2 ) 2 —, —(CH 2 ) 3 —, —(CH 2 ) 4 —, —(CH 2 ) 5 —, —CH═CH—,
or —CH═CH—CH═CH—.