Results 181 to 190 of about 4,874 (220)

Improved interfacial adhesion in carbon fiber/poly (ether ether ketone) composites with the sulfonated poly (ether ether ketone) sizing treatment

Journal of Applied Polymer Science, 2021
AbstractA water‐soluble sulfonated poly (ether ether ketone) (SPEEK) sizing agent is prepared and applied to improve the interfacial adhesion of carbon fiber/poly (ether ether ketone) (CF/PEEK) composites. The surface morphology, surface roughness, surface chemistries, and surface free energy of SPEEK sized CF are obtained to understand the sizing ...
Yanan Su, Peipei Liu, Deqi Jing, Xinghua Zhang, Shouchun Zhang   +4 more
openaire   +1 more source

Sodium sulfonate-functionalized poly(ether ether ketone)s

Macromolecular Chemistry and Physics, 1998
A new monomer, sodium 5,5'-carbonylbis(2-fluorobenzenesulfonate) (1), was synthesized by sulfonation of 4,4'-difluorobenzophenone (2) with fuming sulfuric acid. Poly(ether ether ketone)s containing sodium sulfonate groups were synthesized directly via aromatic nucleophilic substitution from the sodium sulfonate-functionalized monomer 1 and Bisphenol A (
Feng Wang, Tianlu Chen, Jiping Xu
openaire   +1 more source

Rheology of concentrated sulfonated poly(ether ether ketone) solutions

Journal of Applied Polymer Science, 2013
ABSTRACTSulfonated polyether ether ketone (SPEEK), an ionic polymer, has been shown to be a potential candidate for fuel cell electrolyte as a proton exchange membrane. Rheological behavior of SPEEK solutions is of great interest to understand the molecular associations as well as due to implications in membrane processing.
Manish Gupta, Abhijit P. Deshpande, P. B. Sunil Kumar   +2 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
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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

Synthesis and properties of poly(aryl ether sulfone ether ketone ketone) (PESEKK)

Journal of Applied Polymer Science, 2005
Abstract4,4′‐bis(Phenoxy)diphenyl sulfone (DPODPS) was synthesized by reaction of phenol with bis(4‐chlorophenyl) sulfone in tetramethylene sulfone in the presence of NaOH. Two poly(aryl ether sulfone ether ketone ketone)s (PESKKs) with high molecular weight were prepared by low temperature solution polycondensation of DPODPS and terephthaloyl chloride
Hong‐Li Wen, Cai‐Sheng Song, Yong‐Fen Tong, Lie Chen, Xiao‐Ling Liu   +4 more
openaire   +1 more source

Crystallization and melting behavior of poly(ether ether ketone)/poly(aryl ether sulfone) blends

Journal of Applied Polymer Science, 2003
AbstractThe crystallization and melting behavior of poly(ether ether ketone) (PEEK) in blends with poly(aryl ether sulfone) (PES) prepared by melt mixing are investigated by differential scanning calorimetry (DSC) and wide‐angle X‐ray scattering (WAXS).
Bhanu Nandan, L. D. Kandpal, G. N. Mathur   +2 more
openaire   +1 more source

Dynamic mechanical behavior of poly(ether ether ketone)/poly(ether sulfone) block copolymers

Macromolecular Chemistry and Physics, 1996
AbstractPoly(ether ether ketone) (PEEK)/poly(ether sulfone) (PES) block copolymers were synthesized via condensation reaction between fluorine‐terminated PEEK oligomers and hydroxyl‐terminated PES oligomers. The dynamic mechanical behavior of a composite sample prepared by compression molding of a glass fibre cloth and the copolymer was investigated by
Junkui Cao, Wencheng Su, Rongtang Ma, Zhongwen Wu, Mitsuhiro Shibata, Hiroyuku Takeishi, Ryutoku Yosomiya   +6 more
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Poly(ether ether ketone)/poly(aryl ether sulfone) blends: Melt rheological behavior

Journal of Polymer Science Part B: Polymer Physics, 2004
AbstractDynamic rheological measurements were carried out on blends of poly(ether ether ketone) (PEEK)/poly(aryl ether sulfone) (PES) in the melt state in the oscillatory shear mode. The data were analyzed for the fundamental rheological behavior to yield insight into the microstructure of PEEK/PES blends.
Bhanu Nandan, L. D. Kandpal, G. N. Mathur   +2 more
openaire   +1 more source

In situ hybrid composites of thermoplastic poly(ether ether ketone), poly(ether sulfone) and polycarbonate

Composites Science and Technology, 2000
Abstract In order to overcome the poor processability of short-fibre-reinforced thermoplastics and to enhance the mechanical performance of thermoplastics reinforced with thermotropic liquid crystalline polymer (TLCP) fibrils (in situ composites), a new concept of an in situ hybrid composite has been put forward.
Jiasong He, Yuli Wang, Hongzhi Zhang
openaire   +1 more source