## Abstract Zirconium pyrophosphate (ZPP)/poly(2,5βbenzimidazole) composites were prepared by polymerization of 3,4βdiaminobenzoic acid with zirconium hydrogen phosphate in polyphosphoric acid. The composite membranes for polymer electrolyte membranes were prepared by casting the polymerization sol
Poly(2,5-benzimidazole) nanofibers prepared by reaction-induced crystallization
β Scribed by Kimura, Kazuya; Gong, Jin; Kohama, Shin-ichiro; Yamazaki, Shinichi; Uchida, Tetsuya; Kimura, Kunio
- Book ID
- 109974039
- Publisher
- Nature Publishing Group
- Year
- 2010
- Tongue
- English
- Weight
- 755 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0032-3896
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Needle-like poly(azomethine) crystals were successfully prepared by the polycondensation of 1,4-phenylenediamine and 1,4terephthalaldehyde in liquid paraffin at 180 8C. The favorable polymerization concentration for the preparation of the well-defined needle-like crystals was 2.0 Β£ 10 22 mol l 21 .
We report the preparation of phosphoric acid doped poly(2,5-benzimidazole) (ABPBI) membranes for PEMFC by simultaneously doping and casting from a poly(2,5-benzimidazole)/phosphoric acid/methanesulfonic acid (MSA) solution. The evaporation of MSA yields a very homogeneous membrane having a better co