Method for making polymer, and associated polymer, membrane and electrode
View Patent ↗A method is provided, comprising: copolymerizing a monomer comprising at least two amide groups, a monomer of formula (a) and a sulfonic acid or salt monomer, wherein R 1 is CH 3 or H. A polymer made by the method, a membrane and an electrode comprising the polymer are provided.
1. A method comprising: copolymerizing a monomer comprising at least two amide groups, a monomer of formula (a)
and a sulfonic acid or salt monomer, wherein R 1 is CH 3 or H, wherein the monomer comprising at least two amide groups is selected from carbonyldiamine and a compound of formula (c)
wherein R 3 is NH, aliphatic radical or ether unit.
2. The method of claim 1 , wherein the sulfonic acid or salt monomer is of formula (b):
wherein
R 2 is CH 3 or H; X is NH or O and Y is alkyl.
3. The method of claim 2 , wherein the sulfonic acid or salt monomer is 2-acrylamido-2-methylpropane sulfonic acid.
4. The method of claim 1 , wherein the sulfonic acid or salt monomer is 2-acrylamido-2-methylpropanesulfonic acid, styrene sulfonic acid, sulfoalkyl (meth)-acrylates, sulfoalkyl itaconates, with a C 1 to C 6 alkyl radical, or vinylsulfonic acid and ammonium, alkali metal or alkaline earth metal salts thereof.
5. The method of claim 1 , wherein the sulfonic acid or salt monomer is 2-acrylamido-2-methylpropanesulfonic acid, styrenesulfonic acid, p-styrenesulfonic acid, sulfopropyl acrylate, sulfopropyl itaconate or vinylsulfonic acid and ammonium, sodium, potassium and calcium salts thereof.
6. The method of claim 1 , wherein the monomer of formula (a) is N-methylolacrylamide (N-(hydroxymethyl) acrylamide, NMA), N-methylolmethacrylamide (NMMA), N-(isobutoxymethyl)-acrylamide (IBMA), N-(isobutoxymethyl)-methacrylamide or N-(n-butoxymethyl)-acrylamide (NBMA).
7. The method of claim 1 , wherein the monomer comprising at least two amide groups is selected from biuret and succinamide.
8. The method of claim 1 , additionally comprising copolymerizing in the presence of a free radical initiator.
9. The method of claim 8 , wherein the free radical initiator comprises ammonium or potassium persulphate, 2,2′-(azobis(2-methylpropionamidine) dihydrocloride, hydrogen peroxide, or potassium, sodium or ammonium peroxodiphosphate.
10. A polymer prepared by a method comprising: copolymerizing a monomer comprising at least two amide groups, a monomer of formula (a)
and a sulfonic acid or salt monomer, wherein R 1 is CH 3 or H, the monomer comprising at least two amide groups is selected from carbonyldiamine and a compound of formula (c)
wherein R 3 is NH, aliphatic radical or ether unit.
11. A membrane comprising the polymer prepared by: copolymerizing a monomer comprising at least two amide groups, a monomer of formula (a)
and a sulfonic acid or salt monomer, wherein R 1 is CH 3 or H, wherein the monomer comprising at least two amide groups is selected from carbonyldiamine and a compound of formula (c)
wherein R 3 is NH, aliphatic radical or ether unit.
12. An electrode comprising the membrane comprising a polymer prepared by: copolymerizing a monomer comprising at least two amide groups, a monomer of formula (a)
and a sulfonic acid or salt monomer, wherein R 1 is CH 3 or H, wherein the monomer comprising at least two amide groups is selected from carbonyldiamine and a compound of formula (c)
wherein R 3 is NH, aliphatic radical or either unit.
13. The electrode of claim 12 wherein the sulfonic acid or salt monomer is of formula (b):
wherein
R 2 is CH 3 or H; X is NH or O and Y is alkyl.
14. The electrode of claim 13 , wherein the sulfonic acid or salt monomer is 2-acrylamido-2-methylpropane sulfonic acid.
15. The electrode of claim 12 , wherein the sulfonic acid or salt monomer is 2-acrylamido-2-methylpropanesulfonic acid, styrene sulfonic acid, sulfoalkyl (meth)-acrylates, sulfoalkyl itaconates, with a C 1 to C 6 alkyl radical, or vinylsulfonic acid and ammonium, alkali metal or alkaline earth metal salts thereof.
16. The electrode of claim 12 , wherein the sulfonic acid or salt monomer is 2-acrylamido-2-methylpropanesulfonic acid, styrenesulfonic acid, p-styrenesulfonic acid, sulfopropyl acrylate, sulfopropyl itaconate or vinylsulfonic acid and ammonium, sodium, potassium and calcium salts thereof.
17. The electrode of claim 12 , wherein the monomer of formula (a) is N-methylolacrylamide (N-(hydroxymethyl) acrylamide, NMA), N-methylolmethacrylamide (NMMA), N-(isobutoxymethyl)-acrylamide (IBMA), N-(isobutoxymethyl)-methacrylamide or N-(n-butoxymethyl)-acrylamide (NBMA).
18. The electrode of claim 12 , wherein the copolymerizing is in the presence of a free radical initiator.