The copolyester formed from 40 mol% p-hydroxybenzoic acid (H), 30 mol% isophthalic acid (I), and 30 mol% hydroquinone (Q), designated as HIQ-40, forms isotropic, amorphous films when appropriately cast from a solvent. Thermal annealing leads to a mesogenic texture and some level of crystallinity. It
Effect of the thermal treatment of ionomer films on permeability and permselectivity
β Scribed by Tareq Al-Ati; Joseph H. Hotchkiss
- Publisher
- John Wiley and Sons
- Year
- 2002
- Tongue
- English
- Weight
- 334 KB
- Volume
- 86
- Category
- Article
- ISSN
- 0021-8995
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## Abstract Perfluorosulfonated ionomer (PFSI) was synthesized and PFSI membranes were prepared via a solutionβcast method and annealed at different temperatures from 150 to 230Β°C. The annealing effect on water content, proton conductivity, and methanol permeability were reported and discussed. Xβr