Results 191 to 200 of about 4,819 (221)

Ionic crosslinking of imidazolium functionalized poly(aryl ether ketone) by sulfonated poly(ether ether ketone) for anion exchange membranes

Journal of Colloid and Interface Science, 2017
Two N3-substituted imidazoles 1,2-dimethylimidazole and 1-butyl-2-methylimidazole were chosen to functionalize poly(aryl ether ketone), respectively. The generated imidazolium cations could electrostatically react with sulfonate ions of the sulfonated poly(ether ether ketone) forming the ionic crosslinking structure of the membranes.
Yixin, Xu, Niya, Ye, Dengji, Zhang, Jingshuai, Yang, Ronghuan, He   +4 more
openaire   +2 more sources

Compatibility studies of sulfonated poly(ether ether ketone)-poly(ether imide)-polycarbonate ternary blends

Journal of Applied Polymer Science, 2000
Binary blends of the sulfonated poly(ether ether ketone) (SPEEK)–poly(ether imide) (PEI) and SPEEK–polycarbonate (PC), and ternary blends of the SPEEK–PEI–PC, were investigated by differential scanning calorimetry. SPEEK was obtained by sulfonation of poly(ether ether ketone) using 95% sulfuric acid.
Yong Sung Chun, Hyun Sung Kwon, Woo Nyon Kim, Ho Gyu Yoon   +3 more
openaire   +1 more source

Modification of sulfonated poly(ether ether ketone) with phenolic resin

Polymers for Advanced Technologies, 2007
AbstractSoluble phenol formaldehyde resin containing hydroxymethyl groups has been used to modify sulfonated poly(ether ether ketone) (SPEEK). Modification has been carried out with films containing both the polymers and using dimethyl formamide (DMF) as casting solvent at various temperatures under reduced pressure. Associated solvent and the hydrogen‐
P. C. Deb, L. D. Rajput, V. R. Hande, S. Sasane, A. Kumar   +4 more
openaire   +1 more source

Synthesis and characterization of sulfonated poly(ether sulfone ether ketone ketone) for proton exchange membranes

Journal of Applied Polymer Science, 2010
AbstractA series of sulfonated poly(ether sulfone ether ketone ketone) (SPESEKK) with different degree of sulfonation (DS) are prepared by the postsulfonation of PESEKK using chlorosulfonic acid as sulfonating agent and concentrated sulfuric acid as solvent.
Weihua Zhou, Jichun Xiao, Yiwang Chen, Rong Zeng, Shuqin Xiao, Xiaohui He, Fan Li, Caisheng Song   +7 more
openaire   +1 more source

Sulfonated poly(ether ether ketone) and sulfonated Poly(1,4-phenylene ether ether sulfone) membranes for vanadium redox flow battery

Nafion® is a currently used Proton Exchange Membrane (PEM) in Vanadium Redox Flow Batteries (VRB). It is an excellent proton conducting and fully hydrated membrane, but it has a very high cost. In order to reduce the cost of the membrane used in VRB and to reduce the vanadium permeability across the membrane during the operation, sulfonated poly (ether
openaire   +1 more source

Modification of Sulfonated Poly(Ether Ether Ketone) for DMFC Application

2012
One of the most important challenges that our world will face in the twenty-first century will be continuing to meet the ever-increasing energy needs of its citizens. Global concerns over energy sustainability and environmental impacts of fossil fuels have motivated efforts to improve our energy sources.
Jaafar, Juhana, Ismail, Ahmad Fauzi, Norddin, Mohammad Noorul Anam, Matsuura, Takeshi   +3 more
openaire   +1 more source

Roles of mRNA poly(A) tails in regulation of eukaryotic gene expression

Nature Reviews Molecular Cell Biology, 2021
Lori Anne Passmore, Jeff Coller
exaly  

Poly(ether ether ketone)s and Poly(ether sulfones) with Pendent Adamantyl Groups

Macromolecules, 1997
Mathias, Lon J., Lewis, Charles M., Wiegel, Kurt N.   +2 more
openaire   +1 more source

Performance of tailored sulfonated poly(ether ether ketone) in dimethyl ether synthesis

Chemie Ingenieur Technik, 2022
A. Greve, T. Osterland, I. Bogatykh, H. Stein, T. Wilharm   +4 more
openaire   +1 more source

Sulfonated Poly(Ether Ketone) Membranes

2015
Chengji Zhao, Gang Zhang, Hui Na
openaire   +1 more source