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Amino‐Functional Polybenzimidazole Blends with Enhanced Phosphoric Acid Mediated Proton Conductivity as Fuel Cell Electrolytes
Author(s) -
Aili David,
Javakhishvili Irakli,
Han Junyoung,
Jankova Katja,
Pan Chao,
Hvilsted Søren,
Jensen Jens Oluf,
Bjerrum Niels J.,
Li Qingfeng
Publication year - 2016
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201600059
Subject(s) - copolymer , membrane , phosphoric acid , monomer , polymer chemistry , conductivity , proton exchange membrane fuel cell , polymerization , electrolyte , condensation polymer , materials science , chemistry , polymer , organic chemistry , biochemistry , electrode
A new amino‐functional polybenzimidazole copolymer is synthesized by homogeneous solution condensation polymerization from a novel monomer, N , N ′‐bis(2,4‐diaminophenyl)‐1,3‐diaminopropane. The copolymer readily dissolves in organic solvents and shows good film forming characteristics. To balance the phosphoric acid uptake and to obtain mechanically robust membranes, the amino‐functional polybenzimidazole derivative is blended with high molecular weight poly[2,2′‐( m ‐phenylene)‐5,5′‐bisbenzimidazole] at different ratios. Due to the high acid uptake, the homogenous blend membranes show enhanced proton conductivity at temperatures well above 100 °C as also confirmed by the fuel cell polarization data.