Aromatic polyether copolymers and polymer blends and fuel...

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Ion-exchange polymer or process of preparing

Reexamination Certificate

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C521S030000, C429S483000, C429S492000, C528S380000, C528S391000, C528S397000, C528S399000, C528S417000, C528S423000

Reexamination Certificate

active

07842733

ABSTRACT:
High temperature polymer electrolyte membranes bearing pyridine and tetramethyl biphenyl moieties are provided. Preferred polymers can exhibit good mechanical properties, high thermal and oxidative stability and high doping ability with strong acids. Further provided are MEA on PEMFC type single cells.

REFERENCES:
patent: 6232411 (2001-05-01), Hara et al.
International Search Report for related International Application No. PCT/IB2007/004294 (6 pages).
Written Opinion for related International Application No. PCT/IB2007/004294 (7 pages).
Pefkianakis, Elefterios K. et al.:“Novel Polymer Electrolyte Membrane, based on Pyridine Comtaining Poly(ether sulfone),for Application in High-Temperature Fuel Cells”Macromolecular Rapid Communications, 26 (21), 1724-1728 CODEN: MRCOE3; ISSN 1022-1336, 2005, XP002495312.
Gourdoupi, N. et al.:“Novel Proton Conducting Polyelectrolyte Composed of an Aromatic Polyether Containing Main-Chain Pyridine Units for Fuel Cell Applications,”Chemistry of Materials, 15(26), 5044-5050 CODEN: CMATEX; ISSN: 0897-4756, 2003, XP002495313.
Jang et al.:“Acid-base Polymide Blends for the Application as Electrolyte Membranes for Fuel Cells,”Journal of Membrane Science, Sep. 1, 2006, Elsevier Scientific Publ. Company, Amsterdam, NL, pp. 321-329, XP005544281, ISSN: 0376-7388.
Daletou M. K., et al.:“Proton Conducting Membranes Based on Blends of PBI with Aromatic Polyethers Containing Pyridine Units,”Journal of Membrane Science, Elsevier Scientific Publ. Company, Amsterdam, NL, vol. 252, No. 1-2, Jan. 1, 2003, pp. 115-122, XP009103762, ISSN: 0376-7388.

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