Hypersulfonated polyelectrolytes: preparation, stability and conductivity

Autor:	Angelika Manhart, Andreas Wohlfarth, Shogo Takamuku, Patric Jannasch, Petra Räder
Rok vydání:	2015
Předmět:	chemistry.chemical_classification Polymers and Plastics Ion exchange Organic Chemistry Arylene Bioengineering Polymer Sulfonic acid Biochemistry Polyelectrolyte Sulfone chemistry.chemical_compound chemistry Thioether Phenylene Polymer chemistry Organic chemistry
Zdroj:	Polymer Chemistry. 6:1267-1274
ISSN:	1759-9962 1759-9954
DOI:	10.1039/c4py01177e
Popis:	Specially tailored polyelectrolytes are becoming important as energy-related materials. Here we explore a synthetic strategy to prepare fully aromatic polymers containing single phenylene rings in the backbone functionalized with four sulfonic acid groups. Thioether bridges of semifluorinated poly(arylene thioether)s were oxidized to sulfone bridges, followed by substitution of all fluorines by NaSH and quantitative oxidation of the resulting thiol groups. This gave poly(arylene sulfone)s containing octasulfonated biphenyl units, reaching ion exchange capacities up to 8 meq g−1 and unprecedented high local sulfonic acid concentrations. These polyelectrolytes are stable up to 300 °C under air and achieve proton conductivities of up to 90 mS cm−1 at 120 °C and 50% relative humidity. Despite the excellent performance of this unique new class of hypersulfonated polymers, our data suggests that incomplete proton dissociation may ultimately limit the conductivity of highly sulfonated polymers.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c2a86bda05b45a031953f5afcde0e25f https://doi.org/10.1039/c4py01177e Zobrazit plný text záznamu