Polybenzimidazolium hydroxides - Structure, stability and degradation
- Polybenzimidazolium hydroxides - Structure, stability and degradation
- 헨켄스마이어디억; 조형래; 김형준; Carolina Nunes Kirchner; Janine Leppin; Alexander Dyck; 장종현; 조은애; 남석우; 임태훈
- 2-Phenyl-imidazolium hydroxide; NMR; hydrolysis; Polybenzimidazole; Anion exchange membrane; Polymer Electrolyte
- Issue Date
- Polymer degradation and stability
- VOL 97, NO 3, 264-272
- Polybenzimidazolium hydroxides are of potential interest for the use in alkaline anion exchange
membrane fuel cells (AAEMFC). Introduction of an ether group in para-position of the 2-phenyl
substituent improves the mesomeric stabilization of imidazolium cations, and O-PBI seems to be more
stable than meta-PBI under alkaline conditions. NMR, IR and XPS analysis show a structural change when
the iodide form is exchanged into the hydroxide form. Surprisingly, this structural change is subject to
a pH sensitive equilibrium and the pure imidazolium form is retained immediately when the pH is
lowered. The molecular structure at high pH is either the 2-carbinol or the amineeamide. Further
hydrolysis necessitates excess hydroxide.
- Appears in Collections:
- KIST Publication > Article
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.