Multiblock sulfonated–fluorinated poly(arylene ether)s for a proton exchange membrane fuel cell

Ghassemi, Hossein; McGrath, James E.; Zawodzinski, Thomas A.

doi:10.1016/j.polymer.2006.02.038

Cited by 290 publications

(196 citation statements)

References 17 publications

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“…11 [71]). In particular, special architecture for sulfonated polymers (e.g., multi block copolymers) can be designed by controlling the topology and/or molecular weight of sulfonated and non-sulfonated oligomers and/or polymers [72][73][74][75]. However, there are relatively few commercially available sulfonated monomers [34].…”

Section: Direct Copolymerization Of Sulfonated Monomersmentioning

confidence: 99%

Sulfonated hydrocarbon membranes for medium-temperature and low-humidity proton exchange membrane fuel cells (PEMFCs)

Park

Lee

Guiver

2011

Progress in Polymer Science

618

229

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Section: Direct Copolymerization Of Sulfonated Monomersmentioning

confidence: 99%

Sulfonated hydrocarbon membranes for medium-temperature and low-humidity proton exchange membrane fuel cells (PEMFCs)

Park

Lee

Guiver

2011

Progress in Polymer Science

618

229

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“…The current materials research explores different fields: blend of polymers, cross-linked membranes, ionic liquids, block-copolymers, and organic/inorganic hybrids [5][6][7][8][9]. Organic/inorganic hybrids can offer opportunities in many areas and not last in the field of fuel cell materials [10].…”

Section: Introductionmentioning

confidence: 99%

Composite polymer electrolytes of sulfonated poly-ether-ether-ketone (SPEEK) with organically functionalized TiO2

Vona

Sgreccia

Donnadio

et al. 2011

Journal of Membrane Science

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a b s t r a c tSynthesis and properties of proton-conducting composites of SPEEK with organically functionalized TiO 2 are described. Composites with hydrophilic titania particles present an inhomogeneous microstructure with agglomeration of TiO 2 particles, high strength and low ductility, high water uptake and proton conductivity. Composites with hydrophobic titania particles have a very homogeneous microstructure, very reproducible mechanical properties, lower water uptake and proton conductivity.

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“…31 Another approach to induce nanophase separation is through block copolymer architecture, whereby sulfonic acid groups are concentrated in blocks along the polymer chain. McGrath et al 33 prepared multiblock sulfonated poly(arylene ether)s with a promising morphological structure by a two-step polycondensation. Membranes having a relatively low IEC of 0.95 mequiv/g had water uptake of 40%, but high proton conductivity of 80 mS/cm.…”

Section: Introductionmentioning

confidence: 99%

Polymer Electrolyte Membranes Derived from New Sulfone Monomers with Pendent Sulfonic Acid Groups

et al. 2010

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New monomers containing two or four pendent phenyl groups were synthesized by bromination of bis(4-fluorophenyl) sulfone, followed by Suzuki coupling with benzeneboronic acid. The resulting monomers were converted to the corresponding sulfonated monomers having two or four pendent sulfonic acid groups, predominately at the p-phenyl position. Aromatic nucleophilic substitution (SNAr) polycondensation using the di- and tetrasulfonated monomers provided sulfonated poly(arylene ether sulfone) copolymers S2-PAES-xx and S4-PAES-xx, respectively, where xx refers to the molar ratio of the sulfonated to non-sulfonated pendent phenyl monomer. Copoly(arylene ether sulfone)s based on the corresponding non-sulfonated monomers were also synthesized for a parallel study on postpolymerization sulfonation of these copolymers. Postsulfonation occurred predominately at the para-pendent phenyl site, and the reactions were complete within a short time (about 30 min), without evidence of chain degradation. Flexible and tough membranes having high mechanical strength were obtained by solution casting of all four series of copolymers. The copolymers with two or four pendent sulfonic acid groups had high proton conductivities in the range of 44−142 mS/cm for S2-PAES-xx and 51−158 mS/cm for S4-PAES-xx at room temperature, respectively. The methanol permeabilities of these copolymers were in the range of 0.8 × 10−8−15.0 × 10−7 cm2/s, which is lower than Nafion (16.7 × 10−7 cm2/s). The S4-PAES-xx membranes displayed better properties (lower water uptake and higher proton conductivities) than the S2-PAES-xx membranes, which can be attributed to the more blocky architecture of the sulfonic acid groups in the S4 membranes. A combination of high proton conductivities, low water uptake, and low methanol permeabilities for some of the obtained copolymers indicated that they are good candidate materials for proton exchange membrane in fuel cell applications.

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Multiblock sulfonated–fluorinated poly(arylene ether)s for a proton exchange membrane fuel cell

Cited by 290 publications

References 17 publications

Sulfonated hydrocarbon membranes for medium-temperature and low-humidity proton exchange membrane fuel cells (PEMFCs)

Sulfonated hydrocarbon membranes for medium-temperature and low-humidity proton exchange membrane fuel cells (PEMFCs)

Composite polymer electrolytes of sulfonated poly-ether-ether-ketone (SPEEK) with organically functionalized TiO2

Polymer Electrolyte Membranes Derived from New Sulfone Monomers with Pendent Sulfonic Acid Groups

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