Polybenzimidazole compounds, polymeric media, and methods of post-polymerization modifications
- Idaho Falls, ID
- Shelley, ID
- Chubbuck, ID
A PBI compound includes imidazole nitrogens at least a portion of which are substituted with a moiety containing a carbonyl group, the substituted imidazole nitrogens being bonded to carbon of the carbonyl group. At least 85% of the nitrogens may be substituted. The carbonyl-containing moiety may include RCO--, where R is alkoxy or haloalkyl. The PBI compound may exhibit a first temperature marking an onset of weight loss corresponding to reversion of the substituted PBI that is less than a second temperature marking an onset of decomposition of an otherwise identical PBI compound without the substituted moiety. The PBI compound may be included in separatory media. A substituted PBI synthesis method may include providing a parent PBI in a less than 5 wt % solvent solution. Substituting may use more than 5 equivalents in relation to the imidazole nitrogens to be substituted.
- Research Organization:
- BECHTEL BWXT IDAHO LLC
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC07-99ID13727
- Assignee:
- Battelle Energy Alliance, LLC (Idaho Falls, ID)
- Patent Number(s):
- 7,309,758
- Application Number:
- 10/969,456
- OSTI ID:
- 921072
- Country of Publication:
- United States
- Language:
- English
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Polybenzimidazole compounds, polymeric media, and methods of post-polymerization modifications