Joshua D Moon

US Patent:

20210095122, Apr 1, 2021

Filed:

Apr 2, 2019

Appl. No.:

17/044540

Inventors:

- Austin TX, US
Donald R. PAUL - Austin TX, US
Joshua D. MOON - Austin TX, US

International Classification:

C08L 79/08
B01D 53/22
B01D 71/64
B01D 69/12
B01D 67/00
B01D 53/26

Abstract:

Polymer blends comprising an ortho-functionalized polyimide homo or copolymer and a polybenzimidazole homo or copolymer, wherein the ortho-functionalized polyimide thermally rearranges to a polymer comprising a phenylene heterocyclic group, such as, polybenzoxazole, polybenzothiazole, polybenzimidazole and/or other heterocyclic structure upon heating. Also disclosed are method of forming a polymer blend comprising dissolving an ortho-functionalized polyimide homo or copolymer and a polybenzimidazole homo or copolymer in a solvent, and optional compatibilizer, to form a polymer solution; contacting a support with the polymer solution; and evaporating the solvent to provide a thin layer comprising the polymer blend on the support. Further, methods of heat treating these polymer blends to thermally rearrange the disclosed polyimides are disclosed, as are the polymer blends prepared thereby. Methods of using these polymer blends to separate gases are also disclosed.