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`Poly(arylene ether sulfone) Statistical Copolymers Bearing
`Perfluoroalkylsulfonic Acid Moieties
`
` son, Nat! itz,andRoli 2y:
`
`
`
`Schoolof Polymers and HighPerformance Materials, The University of Southern Mississippi, Hattiesburg, Mississippi
`Article Options
`39406, United States
`Macromolecules, 2011, 44 (4), pp 694-702
`DOI: 10.1021/ma102717d
`Publication Date (Web): January 19, 2011
`Copyright © 2011 American ChemicalSociety
`*Corresponding author. E-mail: Robson.Storey@usm.edu
`
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`The perfluoroalkylsulfonate monomer, N,N-diisopropylethylammonium 2,2-bis(p-
`hydroxyphenyl)pentafluoropropanesulfonate (HPPS), was synthesizedin three steps. Using
`triethyl phosphite, hexafluoroacetone wasfirst converted to ethyl pentafluoroisopropenylether.
`Reaction of the ether with sulfur trioxide produced 2-ketopentafluoropropanesulfonic acid. The
`acid was condensed with 2 equiv of phenol, and the product wasisolated as the N, N-
`diisopropylethylammonium salt. The structure of the final product was confirmed by X-ray
`crystallography. Poly(arylene ether sulfone)s (PAES) were prepared by homopolymerization of
`HPPSwith bis(4-fluorophenyl) sulfone (FPS) and copolymerization of varying molarratios of
`HPPS/biphenol (BP) with FPS. Copolymer number-average molecular weights were in the range
`27 000-34 000 g/mol (GPC). Copolymer compositions ranged from 20 to 61 mol % HPPS
`(HPPS/BP molarratio 0.25-1.56) as determined by ‘9F NMR spectroscopy. lon exchange
`capacity of the copolymers(bytitration) ranged from 0.36 to 1.25 mequiv/g. Equilibrium water
`uptake of the copolymers at 80 °C and 90% relative humidity increased from 7.2 to 14.3 mol
`H,O/mol H*, and proton conductivity increased from 1.6 to 23 mS/cm, as the HPPS/PBratio
`increased from 0.25 to 1.56.
`
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`Effect of Superacidic Side Chain Structures on High Conductivity Aromatic
`PolymerFuel Cell Membranes
`Ying Chang, Angela D. Mohanty, Sarah B. Smedley, Knaldoon Abu-Hakmeh, Young HunLee, JoelE.
`Morgan, Michael A. Hickner, Seung Soon Jang, Chang Y. Ryu, and Chulsung Bae
`Macromolecules 2015 48 (19), 7117-7126
`Abstract | Full Text HTML | PDF | PDF w/ Links
`
`Effects of Block Length and MembraneProcessing Conditions on the
`Morphologyand Properties of Perfluorosulfonated Poly(arylene ether sulfone)
`Multiblock Copolymer Membranes for PEMFC
`Luca Assumma, Huu-Dat Nguyen,Cristina lojoiu, Sandrine Lyonnard, Régis Mercier, and Eliane
`
`Received 12 April 2010
`Published online 19 January 2011
`Publishedin print 22 February 2011
`
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