Abstract
A telechelic organic-inorganic polymer (SiPPSU) where -SiPh(OH)2 groups are covalently linked to the polymeric chain of polyphenylsulfone (PPSU) was prepared and characterized. The polymer was sulfonated up to a degree of sulfonation (DS) equal to 2 (SiSPPSU), then used to prepare blends with sulfonated polyetheretherketone (SPEEK) having DS = 0.9 in 5 and 10 wt.% concentration. The synthesized polymers and the blends were characterized by ATR/FT-IR spectroscopy. Membranes were prepared with these materials and their proton conductivity was measured using electrochemical impedance spectroscopy (EIS). The formation of the blends substantially altered the physicochemical characteristics of SPEEK: the membrane prepared with the blend at the concentration of 5 wt.% exhibited high and stable conductivity values at 120 °C: both when dry (σ = 6.1 × 10-3 S/cm) and wet conditions (σ = 6.4 × 10-2 S/cm for a 50% water uptake), hence, being suitable for application as electrolyte in intermediate temperature polymer electrolyte membrane fuel cells (PEMFCs).
Original language | English (US) |
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Pages (from-to) | 186-191 |
Number of pages | 6 |
Journal | Journal of Membrane Science |
Volume | 279 |
Issue number | 1-2 |
DOIs | |
State | Published - Aug 1 2006 |
Keywords
- Blend
- Organic-inorganic telechelic polymer
- Polyetheretherketone (PEEK)
- Polyphenylsulfone (PPSU)
- Proton exchange membrane
ASJC Scopus subject areas
- Filtration and Separation
- Polymers and Plastics