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• W2079571859 abstract "A series of cardo poly(aryl ether sulfone) copolymers bearing pendant hydroxyl ethyl groups (-CH(2)CH(2)OH) were synthesized from a new biphenol monomer 2-(2-hydroxyethyl)-3,3-bis(4-hydroxyphenyl)isoindolin-1-one (PPH-OH), 4,4'-biphenol(BP), and 4,4'-difluorodiphenylsulfone (DFDPS). Sulfonic acid groups were readily grafted to the copolymers by reaction of the hydroxyl group with 1,3-propanesultone. The resulting sulfonated copolymers SPES-C-X (where X refer to the content of PPH-OH in the bisphenol monomers) contain side chain sulfoalkyl groups (-CH(2)CH(2)-O-CH(2)CH(2)CH(2)SO(3)H). TEM photographs revealed that SPES-C-100 membrane exhibited characteristic hydrophilic/hydrophobic microphase separated morphology with small interconnected and hydrophilic clusters (1.5-2 nm). Such microphase separated morphology renders the membrane high proton conductivity of 0.056 S/cm (IEC = 1.41 mequiv./g), and low dimensional changes of SPES-C-100 at room temperature. SPES-C-X membranes exhibited the methanol permeability in the range of 13.8-5.3 x 10(-8) cm(2)/s, which were much lower than those of SBPES (8.7 x 10(-7) cm(2)/s) and Nafion 117 (2.4 x 10(-7) cm(2)/s). (C) 2010 Elsevier B.V. All rights reserved." @default.
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• W2079571859 date "2011-02-01" @default.
• W2079571859 modified "2023-09-26" @default.
• W2079571859 title "Novel side-chain-type cardo poly(aryl ether sulfone) bearing pendant sulfoalkyl groups for proton exchange membranes" @default.
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• W2079571859 doi "https://doi.org/10.1016/j.memsci.2010.10.065" @default.
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