Covalent-Ionically Cross-linked Poly(Etheretherketone)-Basic Polysulfone Blend Ionomer Membranes

✍ Scribed by J. Kerres

• Book ID: 102214223
• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 291 KB
• Volume: 6
• Category: Article
• ISSN: 1615-6846
• DOI: 10.1002/fuce.200500207

✦ Synopsis

Abstract

Sulfinated‐sulfonated PEEK was synthesized via partial reduction of sulfochlorinated PEEK with aqueous Na~2~SO~3~. From these polymers, covalent‐ionically cross‐linked ionomer blend membranes were prepared by mixing the sulfinated‐sulfonated PEEK with different base‐modified polysulfones (PSU‐base), followed by cross‐linking with 1,4‐diiodobutane. These membranes have been compared with covalently cross‐linked membranes which were obtained by the cross‐linking of sulfinated‐sulfonated PEEK and with ionically cross‐linked membranes obtained by mixing sulfonated PEEK with different PSU bases. The membranes have been characterized in terms of thermal stability by means of thermogravimetry (TGA) and coupled TGA‐FTIR, in terms of cross‐linking extent by extraction experiments, in terms of proton conductivity by impedance spectroscopy, and finally, in terms of water uptake by gravimetric analysis.