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Synthesis of Crosslinked Sulfonated Poly(phenylene sulfide sulfone nitrile) for Direct Methanol Fuel Cell Applications
Author(s) -
Phu Duong Sang,
Lee Chang Hyun,
Park Chi Hoon,
Lee So Young,
Lee Young Moo
Publication year - 2009
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200800496
Subject(s) - methanol , sulfide , nitrile , phenylene , polymer chemistry , sulfone , membrane , swelling , direct methanol fuel cell , proton exchange membrane fuel cell , benzoic acid , methanol fuel , materials science , sulfonic acid , chemistry , chemical engineering , organic chemistry , composite material , polymer , anode , biochemistry , electrode , engineering
With a view towards direct methanol fuel cell applications, novel sulfonated poly(phenylene sulfide sulfone nitrile) (sPPSSfN) has been prepared and subsequently crosslinked by a Friedel‐Craft reaction using 4,4′‐oxybis(benzoic acid) as a crosslinker to achieve lower water swelling and lower methanol permeability. The dimensional change of SPPSSfN40 is 43.7% in 90 °C liquid water but that of the crosslinked membrane, XsPPSSfN40, is 23.3% while maintaining proton conductivity at 0.22 S · cm −1 . These results show that the Friedel‐Craft crosslinking of the novel sPPSSfN membrane effectively reduces water uptake and the degree of swelling while improving the dimensional stability and maintaining high proton conductivity.