Abstract
A series of branched and cross-linked poly (arylene ether sulfone) ionomers containing sulfofluorenyl groups, 2b-e were synthesized in order to investigate the effect of these chemical modifications on the properties. Ionomers 2b-e gave a flexible, ductile, and transparent membrane by casting from DMAc solution. The branching and cross-linking were effective to improve the dimensional stability under wet conditions without losing their high thermal, oxidative, and hydrolytic stability. The cross-linked ionomer 2e (IEC = 2.63 meq-g-1) membrane showed high proton conductivity of 0.2 S · cm-1 at 87% RH and 0.02 S · cm-1 at 57% RH. The branched ionomer 2b membrane was durable in proton conductivity for almost 2 months without any chemical degradation.
| Original language | English |
|---|---|
| Pages (from-to) | 1334-1343 |
| Number of pages | 10 |
| Journal | Macromolecular Chemistry and Physics |
| Volume | 207 |
| Issue number | 15 |
| DOIs | |
| Publication status | Published - 2006 Aug 2 |
| Externally published | Yes |
Keywords
- Conducting polymers
- Fuel cells
- Ionomers
- Membranes
- Polyethers
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry