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Fully aromatic block copolymers for fuel cell membranes with densely sulfonated nanophase domains

Takamuku, Shogo LU and Jannasch, Patric LU (2011) In Macromolecular Rapid Communications 32(5). p.474-480
Abstract
Two multiblock copoly(arylene ether sulfone)s with similar block lengths and ion exchange capacities (IECs) were prepared by a coupling reaction between a non-sulfonated precursor block and a highly sulfonated precursor block containing either fully disulfonated diarylsulfone or fully tetrasulfonated tetraaryldisulfone segments. The latter two precursor blocks were sulfonated via lithiation-sulfination reactions whereby the sulfonic acid groups were exclusively placed in ortho positions to the many sulfone bridges, giving these blocks IECs of 4.1 and 4.6 meq·g−1, respectively. Copolymer membranes with IECs of 1.4 meq·g−1 displayed well-connected hydrophilic nanophase domains and had decomposition temperatures at, or above, 300 °C under... (More)
Two multiblock copoly(arylene ether sulfone)s with similar block lengths and ion exchange capacities (IECs) were prepared by a coupling reaction between a non-sulfonated precursor block and a highly sulfonated precursor block containing either fully disulfonated diarylsulfone or fully tetrasulfonated tetraaryldisulfone segments. The latter two precursor blocks were sulfonated via lithiation-sulfination reactions whereby the sulfonic acid groups were exclusively placed in ortho positions to the many sulfone bridges, giving these blocks IECs of 4.1 and 4.6 meq·g−1, respectively. Copolymer membranes with IECs of 1.4 meq·g−1 displayed well-connected hydrophilic nanophase domains and had decomposition temperatures at, or above, 300 °C under air. The copolymer with the tetrasulfonated tetraaryldisulfone segments showed a proton conductivity of 0.13 S·cm−1 at 80 °C under fully humidified conditions, and surpassed that of a perfluorosulfonic acid membrane (NRE212) by a factor of 5 at –20 °C over time. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
polymer electrolyte fuel cell membranes, sulfonations, amphiphilic block copolymers, ionomers, polycondensation
in
Macromolecular Rapid Communications
volume
32
issue
5
pages
474 - 480
publisher
John Wiley & Sons
external identifiers
  • wos:000288037100010
  • scopus:79951905408
ISSN
1022-1336
DOI
10.1002/marc.201000683
language
English
LU publication?
yes
id
394bbf8c-04b3-428d-9cf6-7b53ecc12b0e (old id 1744864)
date added to LUP
2011-01-11 14:07:22
date last changed
2017-04-23 03:15:45
@article{394bbf8c-04b3-428d-9cf6-7b53ecc12b0e,
  abstract     = {Two multiblock copoly(arylene ether sulfone)s with similar block lengths and ion exchange capacities (IECs) were prepared by a coupling reaction between a non-sulfonated precursor block and a highly sulfonated precursor block containing either fully disulfonated diarylsulfone or fully tetrasulfonated tetraaryldisulfone segments. The latter two precursor blocks were sulfonated via lithiation-sulfination reactions whereby the sulfonic acid groups were exclusively placed in ortho positions to the many sulfone bridges, giving these blocks IECs of 4.1 and 4.6 meq·g−1, respectively. Copolymer membranes with IECs of 1.4 meq·g−1 displayed well-connected hydrophilic nanophase domains and had decomposition temperatures at, or above, 300 °C under air. The copolymer with the tetrasulfonated tetraaryldisulfone segments showed a proton conductivity of 0.13 S·cm−1 at 80 °C under fully humidified conditions, and surpassed that of a perfluorosulfonic acid membrane (NRE212) by a factor of 5 at –20 °C over time.},
  author       = {Takamuku, Shogo and Jannasch, Patric},
  issn         = {1022-1336},
  keyword      = {polymer electrolyte fuel cell membranes,sulfonations,amphiphilic block copolymers,ionomers,polycondensation},
  language     = {eng},
  number       = {5},
  pages        = {474--480},
  publisher    = {John Wiley & Sons},
  series       = {Macromolecular Rapid Communications},
  title        = {Fully aromatic block copolymers for fuel cell membranes with densely sulfonated nanophase domains},
  url          = {http://dx.doi.org/10.1002/marc.201000683},
  volume       = {32},
  year         = {2011},
}