Results 11 to 20 of about 11,637 (219)

Stabilized SPEEK Membranes with a High Degree of Sulfonation for Enthalpy Heat Exchangers [PDF]

Coatings, 2018
In this investigation, we explored for the first time the use of cross-linked sulfonated poly (ether ether ketone) (SPEEK) membranes in the fabrication of enthalpy heat exchangers.
R. Narducci, M. Vona, A. Marrocchi, G. Baldinelli   +3 more
semanticscholar   +3 more sources

Degrees of Sulfonation: Mapping the Reactivity Landscape of Acridine and Acridone

Organics
Although sulfonated acridines and acridones are valuable scaffolds in diagnostics and materials science, to our best knowledge, there is no comprehensive study that addresses how the degree of sulfonation depends on reaction parameters. To fill this gap,
Péter Kisfaludi, Sára Spátay, Péter Huszthy, Ádám Golcs   +3 more
doaj   +2 more sources

Preparation and Application of Aromatic Polymer Proton Exchange Membrane with Low-Sulfonation Degree [PDF]

International Journal of Chemical Engineering, 2020
4,4′-Dichlorodiphenylsulfone-3,3′-disulfonic acid (disodium) salt and 4,4′-difluorodiphenylsulfone were used as sulfonated monomer. 4,4′-Fluorophenyl sulfones were used as the nonsulfonated monomer.
Yushan Gao, Zhidan Zhang, Shuangling Zhong, Reza Daneshfar   +3 more
doaj   +2 more sources

Sulfonated polyimide/chitosan composite membranes for a vanadium redox flow battery: influence of the sulfonation degree of the sulfonated polyimide [PDF]

Polymer Journal, 2016
The sandwich-like sulfonated polyimide/chitosan (SPI/CS) composite membranes were prepared and the SDs of the SPI were adjusted from 30 to 70%. Based on the proton/vanadium ion selectivity and chemical stability, the SPI40/CS and SPI50/CS membranes are selected as optimum candidates for all-vanadium redox flow battery (VRFB) applications.
Xiaodong Huang, Shuai Zhang, Yaping Zhang, Hongping Zhang, Xuping Yang   +4 more
semanticscholar   +2 more sources

Determination of the degree of sulfonation in cross-linked and non-cross-linked Poly(ether ether ketone) using different analytical techniques [PDF]

Heliyon
The degree of sulfonation (DS) is a key property of sulfonated polymers, as it significantly influences their swelling behaviour, conductivity and mechanical properties.
Abdul G. Al Lafi, Mohammed S. Rihawy, Abdul W. Allaf, Ali Alzier, Reem Hasan   +4 more
doaj   +2 more sources

A deeper exploration of the relation between sulfonation degree and retanning performance of aromatic syntans

Journal of Leather Science and Engineering, 2021
It is well-known that the sulfonation degree (DS) of aromatic syntan is an important factor affecting its retanning performances. But the quantitative relation between DS and syntan property and the influencing mechanism of DS on syntan property are not ...
Qingyong Sun, Yunhang Zeng, Ya-nan Wang, Yue Yu, Bi Shi   +4 more
doaj   +2 more sources

Dependence of chain conformation on degree of sulfonation and counterion dissociation of sodium poly(styrene sulfonate) in semidilute aqueous solution [PDF]

Polymer, 2004
The chain conformation of sodium poly(styrenesulfonate) (NaPSS) in the semidilute aqueous solution, estimated from the plots of reduced viscosity versus segmental concentration, was found to be dependent on the degree of sulfonation and dissociation extent of counterions.
King-Fu Lin, Horng-Long Cheng, Y. Cheng
semanticscholar   +3 more sources

Degree of sulfonation (DS) - determination by different analytical techniques in ionomers derived from polystyrene

Journal of Polymer Research
Abstract Polymers with ion charges anchored to their structure, known as ionomers, are slightly modified materials with notable applications for electrochemical processes. However, the characterization and quantification of those sulfonic groups grafted to the polymer is uncommon, which can lead to inaccurate data regarding their performance. A
J. S. Hiza, L. Da Silva, R. Benavides, D. M. Acosta   +3 more
semanticscholar   +2 more sources

Synthesis and Characterization of Polystyrene Sulfonic Acid from Expanded Polystyrene Foam as a Catalyst in the Synthesis of Triacetin

Indonesian Journal of Chemistry, 2021
In Indonesia, the composition of waste has gradually changed over time. To reduce expanded polystyrene (EPS) foam waste, we converted it into a heterogeneous acid catalyst, namely Polystyrene Sulfonic Acid (PSSA).
Renita Manurung, Rosdanelli Hasibuan, Fatimah Batubara, Handy Inarto, Alwi Gery Agustan Siregar, Auryn Saputra   +5 more
doaj   +1 more source

Proton Exchange Membrane Based on Sulfonated Poly (Aromatic Imide-Co-Aliphatic Imide) for Direct Methanol Fuel Cell [PDF]

Materials Research, 2017
A new sulfonated poly(aromatic imide-co-aliphatic imide) (SPI) for the use as a polymer electrolyte membrane was successfully synthesized from 4,4'-diaminodiphenylmethane (DDM), 4,4'-diaminodiphenylmethane-2,2'-disulfonic acid disodium salt (S-DDM ...
Phornpussadee Umsarika, Sairung Changkhamchom, Nophawan Paradee, Anuvat Sirivat, Pitt Supaphol, Pimpa Hormnirun   +5 more
doaj   +1 more source