Synthesis and characterization of sulfonated bromo-poly(2,6-dimethyl-1,4-phenylene oxide)- co-(2,6-diphenyl-1,4-phenylene oxide) copolymer as proton exchange membrane

Novel polymer electrolyte membranes containing the sulfonic acid groups attached on polymer backbone and side group simultaneously were synthesized. The bromo-poly(2,6-dimethyl-1,4-phenylene oxide)- co-(2,6-diphenyl-1,4-phenylene oxide) copolymer (BrcoPPO) was prepared by oxidative coupling polymeri...

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Bibliographic Details
Published in:	Electrochimica acta Vol. 55; no. 4; pp. 1425 - 1430
Main Authors:	Jeong, Young-Gi, Seo, Dong-Wan, Lim, Young-Don, Jin, Hyun-Mi, Islam Mollah, M.S., Ur, Soon-Chul, Pyun, Sang-Yong, Kim, Whan-Gi
Format:	Journal Article Conference Proceeding
Language:	English
Published:	Kidlington Elsevier Ltd 25-01-2010 Elsevier
Subjects:	Applied sciences DMFC Energy Energy. Thermal use of fuels Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc Exact sciences and technology Fuel cells Polymer electrolyte membrane fuel cells PPO Proton conductivity Sulfonation Proton conductivity Sulfonation Polymer electrolyte membrane fuel cells DMFC PPO Differential scanning calorimetry Fourier transformation Phenylene oxide copolymer Electrical properties Bromine containing copolymer Alcohol fuel cells Copolymerization NMR spectrometry Primary alcohol Sulfonate copolymer Characterization Infrared spectrometry Phenylene oxide(dimethyl) copolymer Preparation Cation exchange membrane Thermal analysis Liquid permeability Proton exchange membrane fuel cells Methanol
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Summary:	Novel polymer electrolyte membranes containing the sulfonic acid groups attached on polymer backbone and side group simultaneously were synthesized. The bromo-poly(2,6-dimethyl-1,4-phenylene oxide)- co-(2,6-diphenyl-1,4-phenylene oxide) copolymer (BrcoPPO) was prepared by oxidative coupling polymerization with 2,6-dimethyl phenol, 2,6-diphenyl phenol, CuCl(I) and pyridine, and followed by bromination with bromine. Copolymer was maintained in 2,6-diphenyl phenol 10 mol% and 2,6-dimethyl phenol 90 mol%. Sulfonation of BrcoPPO (S-BrcoPPO) was carried out in a chlorobenzene solvent using chlorosulfonic acid. The polymeric membranes were cast from dimethylsulfoxide solution. The membranes were studied by nuclear magnetic resonance (NMR), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). Sorption experiments were conducted to observe the interaction of sulfonated polymers with water and methanol. S-BrcoPPO membranes exhibited proton conductivities from 2.3 × 10 −3 to 1.4 × 10 −2 S/cm, water uptake from 7.00 to 49.43%, IEC from 0.58 to 1.38 mequiv./g, methanol permeability from 1.9 × 10 −7 to 3.5 × 10 −7 cm 2/S.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0013-4686 1873-3859
DOI:	10.1016/j.electacta.2009.06.012