NDLI: Block poly(arylene ether sulfone ketone)s containing densely sulfonated linear hydrophilic segments as proton conductive membranes

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Block poly(arylene ether sulfone ketone)s containing densely sulfonated linear hydrophilic segments as proton conductive membranes

Content Provider	Semantic Scholar
Author	Miyatake, Kenji Hirayama, Daigo Bae, Byungchan Watanabe, Masahiro
Copyright Year	2012
Abstract	Synthesis and properties of aromatic block copolymers composed of highly sulfonated phenylene ether sulfone ketone units as hydrophilic blocks and phenylene ether biphenyene sulfone units as hydrophobic blocks are reported. High molecular weight block copolymers 4 (Mw = 275–362 kDa and Mn = 76–144 kDa) with different compositions (number of repeat unit in the hydrophobic blocks (X) = 15, 30, or 60, and that of hydrophilic blocks (Y) = 4, 8, or 12) were synthesized. Transparent and bendable membranes were obtained by casting from the solution of 4. Due to the rigid rod-like structure of the hydrophilic blocks, the nanophase-separated morphology was not as distinct as that of the conventional sulfonated aromatic block copolymer membranes. Highly sulfonated hydrophilic blocks, which contained phenylene rings with sulfonic acid groups and electron-withdrawing sulfone or ketone groups, contributed to the high proton conductivity and improved oxidative stability of 4 membranes. The 4 (X60Y12) membrane with low IEC (1.18 mequiv g−1) showed comparable or higher conductivity than that of Nafion at >80% relative humidity (RH).
Starting Page	2517
Ending Page	2522
Page Count	6
File Format	PDF HTM / HTML
DOI	10.1039/C2PY20318A
Volume Number	3
Alternate Webpage(s)	http://www.rsc.org/suppdata/py/c2/c2py20318a/c2py20318a.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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