JOURNAL OF POLYMER SCIENCE PART A: POLYMER CHEMISTRY DOI 10.1002/POLA
14 de Bonis, C.; D’Epifanio, A.; Di Vona, M. L.; Mecheri, B.; Tra-
versa, E.; Trombetta, M.; Licoccia, S. J Polym Sci Part A: Polym
Chem 2010, 48, 2178–2186.
sulfone and triazole groups, water could have better access to
the former groups to cause hydrolysis.
CONCLUSIONS
15 Guo, X.; Fang, J.; Watari, T.; Tanaka, K.; Kita, H.; Okamoto,
Effect of azole groups on the properties of sulfonated poly(ar-
ylene ether) membranes was investigated. From the stand-
point of synthesis and film forming capability, oxadiazole, and
triazole groups did not have effects. Trifluoromethylphenyl-
triazole groups, however, caused lower solubility and lower
molecular weight of the resulting polymers. Incorporation of
oxadiazole groups was effective for improving the proton con-
ductivity due to its enhanced hydrophilicity. Combination of
block copolymer structure and oxadiazole groups was desira-
ble to balance absorbing and proton conductive properties. In
contrast, oxadiazole groups have negative effects on mechani-
cal properties and hydrolytic stability. These disadvantages
need to be improved by introducing rigid-rod like hydropho-
bic component and protecting electronically and sterically
oxadiazole groups, which are in our future agenda.
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16 Asano, N.; Aoki, M.; Suzuki, S.; Miyatake, K.; Uchida, H.;
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17 Einsla, B. R.; Hong, Y.-T.; Kim, Y. S.; Wang, F.; Gunduz, N.;
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This work was partly supported by the New Energy and
Industrial Technology Development Organization (NEDO)
through the HiPer-FC Project, and the Ministry of Education,
Culture, Sports, Science and Technology (MEXT) Japan
through a Grant-in-Aid for Scientific Research (23350089
and 23656427).
22 Ng, F.; Jones, D. J.; Rozie`re, J.; Bauer, B.; Schuster, M.;
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