Partially Fluorinated Arylene Polyethers and Their Ternary Blend Membranes with PBI and H3PO4. Part I. Synthesis and Characterisation of Polymers and Binary Blend Membranes

✍ Scribed by J. Kerres; F. Schönberger; A. Chromik; T. Häring; Q. Li; J. O. Jensen; C. Pan; P. Noyé; N. J. Bjerrum

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 239 KB
• Volume: 8
• Category: Article
• ISSN: 1615-6846
• DOI: 10.1002/fuce.200800011

✦ Synopsis

Abstract

A partially fluorinated polyether ionomer from polycondensation of decafluorobiphenyl with 2,2‐bis(4‐hydroxyphenyl)hexafluoropropane, followed by sulphonation with H~2~SO~4~ (60% SO~3~), has been prepared and optimised in terms of molecular weight and sulphonation degree. The partially fluorinated ionomer has been blended with poly(2,2′‐m‐phenylene‐5,5′‐bibenzimidazole) (PBI), yielding base–acid blends with PBI in excess. The base–acid blend membranes have been characterised in terms of solubility in DMAc, water uptake and oxidative stability by immersion in aqueous 5 wt.‐% H~2~O~2~ solutions and Fenton's Reagent, respectively.