Linear　fluorinated　poly(arylene　ether)s　with　and　without　pendent　allyl　groups　(CFPAE　and　FPAE)　were　successfully　polymerized　from　decafluorobiphenyl　at　room　temperature.　The　subsequent　SN2　nucleophilic　substitution　of　the　remaining　F　atom　on　CFPAE　and　FPAE　with　sodium　4-hydroxybenzenesulfonate　yielded　SCFPAE　and　SFPAEs　in　one　simple　step　under　mild　conditions.　The　chemical　structures　of　the　polymers　were　confirmed　by　H-1　NMR　and　FT-IR.　The　ion　exchange　capacity　(IEC),　inherent　viscosity,　water　uptake,　swelling　ratio,　proton　conductivity,　mechanical　property,　thermal　stability,　and　oxidative　stability　of　the　SFPAEs　were　characterized.　The　experimental　results　revealed　that　the　IEC　of　the　SFPAEs　can　be　facilely　controlled　by　the　loading　amount　of　sodium　4-hydroxybenzenesulfonate　in　the　reaction　mixture.　The　SFPAE-20　with　an　IEC　of　2.0　mmol　g(-1)　exhibited　an　in-plane　proton　conductivity　of　106　mS　cm(-1)　at　30　degrees　C,　higher　than　that　of　Nafion　N212.　More　importantly,　the　SFPAEs　showed　significantly　enhanced　oxidative　stabilities　compared　to　sulfonated　non-fluorinated　analogs　in　literature.　While　there　was　still　a　trade-off　between　proton　conductivity　and　mechanical　strength　as　often　seen　for　homogeneous　systems,　the　SFPAEs　were　demonstrated　to　be　promising　candidates　for　proton　exchange　membranes.　(C)　2017　Hydrogen　Energy　Publications　LLC.　Published　by　Elsevier　Ltd.　All　rights　reserved.