Thermostable poly(<i>p</i>‐phenylene sulfide sulfonic acid) as ion exchangers

Song, Hyeon-Bee; Miyatake, Kenji; Yamamoto, Kimihisa; Tsuchida, Eishun

doi:10.1002/pat.1994.220050602

Cited by 2 publications

(1 citation statement)

References 13 publications

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“…Another weight loss is observed at 570 and 670 C for sPBI-CF 3 -sCF 3 75 and sPBI-sCF 3 , respectively. These particularly high temperatures of decomposition probably correspond to the degradation of more stable crosslinked chains, which could be formed by condensation of sulfonic groups to sulfone intermolecular or intramolecular link at around 250 C. [41][42][43] This could explain the very slow and moderate weight loss from 150 to 450 C, which would be attributed to the loss of produced water.…”

Section: Thermal Properties Of Ionomersmentioning

confidence: 99%

Synthesis of novel proton‐conducting highly sulfonated polybenzimidazoles for PEMFC and the effect of the type of bisphenyl bridge on polymer and membrane properties

Péron

Jones

et al. 2011

J. Polym. Sci. A Polym. Chem.

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Six series of novel highly sulfonated polybenzimidazoles (sPBIs) with high molecular weight were prepared by direct polycondensation between 3,3 0 -diaminobenzidine and original multisulfonated dinuclear dicarboxylic acids containing bridging ether, sulfone, and hexafluoroisopropylidene moieties. All reactions were carried out in polyphosphoric acid, which acts as both solvent and catalyst. The degree of sulfonation was modulated in the final products by varying the proportion of sulfonated to nonsulfonated dicarboxylic acids used in the synthesis. The high purity of the disulfonated and tetrasulfonated monomers allows wholly sulfonated homopolymers to be obtained. Confirmation of the chemical structure and the degree of sulfonation were derived from 1 H nuclear magnetic resonance spectroscopy. Inherent viscosity was estimated as between 0.70 and 5.33 dL g À1 for sPBIs with ion exchange capacity in the range 0.87-4.68 mequiv g À1 . Dynamic thermogravimetric analysis in air showed no weight loss below 350 C (heating rate 5 C min À1 ). The nature of the bisphenyl bridge has clear influence on the water uptake and proton conduction properties of the resulting sPBI membranes, with hexafluoroisopropylidene links providing materials of highest conductivity as well as favoring film-forming characteristics.

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Section: Thermal Properties Of Ionomersmentioning

confidence: 99%

Synthesis of novel proton‐conducting highly sulfonated polybenzimidazoles for PEMFC and the effect of the type of bisphenyl bridge on polymer and membrane properties

Péron

Jones

et al. 2011

J. Polym. Sci. A Polym. Chem.

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Alkylsulfonioarylene and Thioarylene Polymers Derived from Sulfonium Electrophiles

Tsuchida¹,

Oyaizu²

2003

Bulletin of the Chemical Society of Japan

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Superacidification of sulfoxides and sulfinates effects the electrophilic substitution reaction of the resulting hydroxysulfonium ions onto aromatic rings with the elimination of H2O at room temperature. The present account emphasizes the utility of the reaction for use as an elementary step in organic synthesis. The product, the alkyldiarylsulfonium ion, often quantitatively obtained, allows the synthesis of alkylsulfonio-bridged (λ4-alkylsulfanyliumdiyl) aromatic polymers. High molecular-weight poly(alkylsulfonioarylene) salts with a wide range of structural dimensionalities from linear to network architectures have been made accessible by the regioselective condensation of aryl sulfoxides. The polymers possess interesting properties such as good solubility in polar organic solvents and sometimes even in H2O, susceptibility to nucleophiles to provide thioarylene derivatives, photo-degradability, and electric semiconductivity, according to the dimensionality of the molecule. The synthetic chemistry of the alkylsulfonioarylene polymers as well as their possible applications in high molecular-weight poly(thioarylene) synthesis, photochemical recycling processes of an engineering plastic poly(thio-1,4-phenylene), and photo-resist technologies, are reviewed.

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Thermostable poly(p‐phenylene sulfide sulfonic acid) as ion exchangers

Cited by 2 publications

References 13 publications

Synthesis of novel proton‐conducting highly sulfonated polybenzimidazoles for PEMFC and the effect of the type of bisphenyl bridge on polymer and membrane properties

Synthesis of novel proton‐conducting highly sulfonated polybenzimidazoles for PEMFC and the effect of the type of bisphenyl bridge on polymer and membrane properties

Alkylsulfonioarylene and Thioarylene Polymers Derived from Sulfonium Electrophiles

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