5422-91-3Relevant articles and documents
Enhanced thermo-oxidative stability of sulfophenylated poly(ether sulfone)s
Liu, Baijun,Robertson, Gilles P.,Kim, Dae-Sik,Sun, Xiaohong,Jiang, Zhenhua,Guiver, Michael D.
, p. 403 - 413 (2010)
Monophenylated poly(ether sulfone)s (Ph-PES) and diphenylated poly(ether sulfone)s (DiPh-PES), were synthesized as starting materials for the preparation of sulfonated polymers with well-defined chemical structure. Mild post-polymerization sulfonation conditions led to sulfonated Ph-PES (Ph-SPES) bearing acid groups on both the pendant phenyl group and the backbone, and sulfonated DiPh-PES (DiPh-SPES) bearing acid groups only on the two pendant phenyl groups. Both series of polymers had excellent mechanical properties, high glass transition temperatures, good thermal and oxidative stability, as well as good dimensional stability. It is interesting to note that exclusively pendant-phenyl-sulfonated (bis-sulfophenylated) DiPh-SPES copolymers possessed obviously better thermal and oxidative stability compared with the corresponding pendant-phenyl-sulfonated/main-chain-sulfonated Ph-SPES copolymers. The methanol permeability values of the membranes were in the range of 7.0?×?10-7-9.4?×?10-8?cm2/s at 30?°C, which is several times lower than that of Nafion 117. DiPh-SPES-50 and Ph-SPES-40 also exhibited high proton conductivity (approximately 0.13?S/cm at 100?°C).
Side-chain sulfonated random and multiblock poly(ether sulfone)s for PEM applications
Vogel, Claus,Komber, Hartmut,Quetschke, Annett,Butwilowski, Wladimir,P?tschke, Albrecht,Schlenstedt, Kornelia,Meier-Haack, Jochen
experimental part, p. 828 - 842 (2012/04/11)
Copoly(arylene ether sulfone)s from 4,4′-difluorodiphenyl sulfone, 4,4′-dihydroxydiphenyl sulfone bis-trimethylsilylether, and 2,5-diphenylhydroquinone bis-trimethylsilylether were obtained by nucleophilic displacement polycondensation with high molecular
On/off electrochemical switches based on quinone-bisketals
Fuentes, Noelia,Cienfuegos, Luis Alvarez De,Parra, Andres,Choquesillo-Lazarte, Duane,Garcia-Ruiz, Juan M.,Marcos, M. Luisa,Bunuel, Elena,Ribagorda, Maria,Carreno, M. Carmen,Cardenas, Diego J.,Cuerva, Juan M.
, p. 1586 - 1588 (2011/03/20)
The synthesis and anodic oxidation of a variety of 2,5-diaryl or dialkynylaryl substituted 1,4-dialkoxybenzenes to quinone bisketals is described. The study of the X-ray structures and electrochemical and spectroscopic properties evidenced that these pair