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@ARTICLE{Hamada:893093,
author = {Hamada, Takashi and Yoshimura, Kimio and Takeuchi, Kota and
Watanabe, Shun and Zhao, Yue and Hiroki, Akihiro and
Hagiwara, Tokio and Shishitani, Hideyuki and Yamaguchi,
Susumu and Tanaka, Hirohisa and Radulescu, Aurel and Ohwada,
Kenji and Maekawa, Yasunari},
title = {{S}ynthesis and {C}haracterization of
4‐{V}inylimidazolium/{S}tyrene‐{C}ografted
{A}nion‐{C}onducting {E}lectrolyte {M}embranes},
journal = {Macromolecular chemistry and physics},
volume = {222},
number = {11},
issn = {1521-3935},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2021-02552},
pages = {2100028},
year = {2021},
abstract = {The β-hydrogen-free imidazole monomer,
2-methyl-N-methyl-4(5)-vinylimidazole (2M4VIm), is
synthesized to prepare anion exchange membranes (AEMs). The
radiation-induced graft polymerization of 2M4VIm and styrene
is performed in poly(ethylene-co-tetrafluoroethylene),
followed by N-alkylation and ion exchange reactions to
prepare 4-vinylimidazolium-containing AEM (2M4VIm/St-AEM).
AEMs that have a 6/4 2M4VIm/St molar ratio and 1.7 mmol
g−1 ion exchange capacity (IEC) result in 75 mS cm−1
conductivity and $60\%$ water uptake at room temperature in
water, demonstrating enhanced values compared to previously
reported 2-methyl-N-vinylimidazolium-containing AEMs
(2MNVIm/St-AEM) that have a similar comonomer ratio and IEC.
The small-angle neutron scattering measurements of dry and
swollen 2M4VIm/St-AEM reveal hydrophilic/hydrophobic
two-phase separation, as observed for 2MNVIm/St-AEM with a
similar Im/St composition. 2M4VIm/St-AEMs exhibit higher
alkaline stability in 1 m KOH at 80 °C at an early stage
owing to the suppression of imidazolium β-elimination but
lower long-term stability than that of 2MNVIm/St-AEM due to
the ring-opening reaction of the imidazolium group due to
its outward orientation from the graft main chain.},
cin = {JCNS-FRM-II / JCNS-1 / JCNS-4 / MLZ},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)JCNS-4-20201012 /
I:(DE-588b)4597118-3},
pnm = {6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ)
(POF4-6G4) / 632 - Materials – Quantum, Complex and
Functional Materials (POF4-632)},
pid = {G:(DE-HGF)POF4-6G4 / G:(DE-HGF)POF4-632},
experiment = {EXP:(DE-MLZ)KWS2-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000645651500001},
doi = {10.1002/macp.202100028},
url = {https://juser.fz-juelich.de/record/893093},
}