Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 30, Issue 21, Pages 1852-1856Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.200900351
Keywords
block copolymer; membrane swelling; polymer electrolyte membrane; polyimide; proton conductivity; sulfonated polyphenylene
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Funding
- New Energy and Industrial Technology Development Organization (NEDO)
- Ministry of Education, Culture, Sport, Science and Technology of Japan [19550209]
- Grants-in-Aid for Scientific Research [19550209] Funding Source: KAKEN
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Novel poly(2-(3-sulfo)benzoyl-1,4-phenylene)-block-polynaphthalimide (PSP-b-PI) cop were successfully synthesized by Ni(O)-catalyzed copolymerization of 2,5-dichloro-3'-sulfobenzophenone and dichloro-terminated naphthalimide oligomer. The membranes exhibited a microphase-separated structure and good hydrolytic stability at 130 degrees C. They showed a fairly strong anisotropy of membrane swelling with much smaller in-plane swelling, but a rather weak anisotropy of proton conductivity. The membranes had a fairly high through-plane conductivity in water and even under low relative humidity. The PSP-b-PI copolymer with an IEC of 1.5 meq . g(-1) showed high PEFC performance due to the high through-plane conductivity.
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