US 12,220,691 B2
Thermally stable hydrocarbon-based anion exchange membrane and ionomers
Sangwoo Lee, Cohoes, NY (US); Chulsung Bae, Cohoes, NY (US); and Carrie Lynn Trant, Troy, NY (US)
Assigned to Rensselaer Polytechnic Institute, Troy, NY (US)
Filed by RENSSELAER POLYTECHNIC INSTITUTE, Troy, NY (US)
Filed on Mar. 18, 2024, as Appl. No. 18/607,624.
Application 18/607,624 is a division of application No. 17/901,985, filed on Sep. 2, 2022, granted, now 11,969,723.
Application 17/901,985 is a continuation of application No. 17/208,364, filed on Mar. 22, 2021, granted, now 11,465,139, issued on Oct. 11, 2022.
Claims priority of provisional application 62/992,230, filed on Mar. 20, 2020.
Prior Publication US 2024/0286123 A1, Aug. 29, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. B01J 41/14 (2006.01); C08F 212/08 (2006.01); C08F 212/32 (2006.01); C08J 5/22 (2006.01)
CPC B01J 41/14 (2013.01) [C08F 212/08 (2013.01); C08F 212/32 (2013.01); C08J 5/2231 (2013.01); C08J 2325/08 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method of making an anion exchange membrane, comprising:
providing a reaction medium including 1,1-diphenylethylene monomers and 4-tert-butylstyrene monomers;
copolymerizing a polymer backbone including the 1,1-diphenylethylene monomers and 4-tert-butylstyrene monomers;
grafting a plurality of functional groups to phenyl groups on the polymer backbone to achieve a degree of functionalization between about 10% and about 60%; and
casting the polymer as an anion exchange membrane.