title: Synthesis of Crosslinked Sulfonated Poly(phenylene sulfide sulfone nitrile) for Direct Methanol Fuel Cell Applications.
abstract: 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.
authors.affiliation: School of Chemical Engineering, College of Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul, 133-791, Korea.
authors.forename: Duong Sang
authors.initials: DS
authors.lastname: Phu
authors.forename: Chang Hyun
authors.initials: CH
authors.lastname: Lee
authors.forename: Chi Hoon
authors.initials: CH
authors.lastname: Park
authors.forename: So Young
authors.initials: SY
authors.lastname: Lee
authors.forename: Young Moo
authors.initials: YM
authors.lastname: Lee