Results 181 to 190 of about 4,819 (221)

Synthesis and characterization of poly(ether sulfone) and poly(ether sulfone ketone) copolymers

Journal of Applied Polymer Science, 1999
Poly(ether sulfone) and poly(ether sulfone ketone) copolymers (I-V) were synthesized by the nucleophilic substitution reaction of 4,4'-dihydroxy diphenyl sulfone (DHDPS, A) with various mole proportions 4,4'-difluoro benzophenone (DFBP, B) and 4,4'-difluoro diphenyl sulfone (DFDPS, C) using sulfolane as solvent in the presence of anhydrous K 2 CO 3 ...
V. Lakshmana Rao, P. U. Sabeena, M. Rama Rao, K. N. Ninan   +3 more
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Sulfonated carbon nanotubes/sulfonated poly(ether sulfone ether ketone ketone) composites for polymer electrolyte membranes

Polymers for Advanced Technologies, 2011
AbstractA series of composite membranes consisting of sulfonated carbon nanotubes (sCNTs) and sulfonated poly(ether sulfone ether ketone ketone) were successfully fabricated via the solution casting method. The chemical structure, as well as the long‐term stability of the sCNTs in different solvents, was investigated by Fourier transform infrared (FTIR)
Weihua Zhou, Jichun Xiao, Yiwang Chen, Rong Zeng, Shuqin Xiao, Huarong Nie, Fan Li, Caisheng Song   +7 more
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Synthesis and properties of novel random copolymers of poly(ether ketone ether ketone ketone)–poly(ether ketone sulfone imide)

High Performance Polymers, 2013
The monomer containing sulfone and imide linkages, namely bis[4-( p-phenoxybenzoyl)-1,2-benzenedioyl]- N, N, N′, N′-4,4′-diaminodiphenyl sulfone (BPBDADPS), was prepared by the Friedel–Crafts reaction of bis(4-chloroformyl-1,2-benzenedioyl)- N, N, N′, N′-4,4′-diaminodiphenyl sulfone with diphenyl ether.
Minghong Zhou, Yongfeng Sun, Yikai Yu, Mingzhong Cai   +3 more
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SULFONATED POLY(ETHER-KETONE)S CONTAINING HEXAFLUOROISOPROPYLIDENE GROUPS

Journal of Macromolecular Science, Part A, 2001
An aromatic poly(ether-ketone) derived from 4,4′−(hexafluoroisopropylidene)-diphenol and 4,4′-difluorobenzophenone has been sulfonated by using chlorosulfonic acid in 1,2-dichloroethane, in the presence of trimethylchlorosilane. The resulting modified polymers had different degrees of sulfonation depending on the reaction conditions.
Hamciuc, C., Bruma, M., Klapper, M.
openaire   +2 more sources

Preparation and characterization of monovalent cation selective sulfonated poly(ether ether ketone) and poly(ether sulfone) composite membranes

Journal of Colloid and Interface Science, 2006
Highly charged cation permeable composite membranes were prepared by blending of sulfonated poly(ether sulfone) (SPES) with sulfonated poly(ether ether ketone) (SPEEK) in 0 to 90% weight ratio, to adjust the hydrophobic properties and ion selective nature. Extent of sulfonation was confirmed by 1H NMR and ion exchange capacity and degree of sulfonation
G S, Gohil, R K, Nagarale, V V, Binsu, Vinod K, Shahi   +3 more
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Synthesis of copolymers of poly(ether sulfone ether ketone ketone) and poly(ether ketone diphenyl ketone ether ketone ketone) by electrophilic Friedel–Crafts solution polycondensation

Polymers for Advanced Technologies, 2011
AbstractA new monomer, 4,4′‐bis(4‐phenoxybenzoyl)diphenyl(BPOBDP), was synthesized via a two‐step synthetic procedure. A series of novel poly(ether sulfone ether ketone ketone)/poly(ether ketone diphenyl ketone ether ketone ketone) copolymers were prepared by electrophilic Friedel–Crafts solution copolycondensation of isophthaloyl chloride (IPC) with a
Mingzhong Cai, Meihua Zhu, Fen Xiao, Nengwen Ding, Caisheng Song   +4 more
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Synthesis and properties of novel copolymers of poly(ether ketone biphenyl ketone ether ketone ketone) and poly(ether ketone sulfone amide)

Journal of Polymer Research, 2014
The monomer containing sulfone and amide linkages, namely N,N'-bis(4-phenoxybenzoyl)-4,4'-diaminodiphenyl sulfone (BPBDAS), was conveniently prepared by the condensation of 4,4′-diaminodiphenyl sulfone with 4-phenoxybenzoyl chloride in N,N-dimethylacetamide (DMAc).
Yu Wang, Pingping Wang, Qiang Xu, Tao Yan, Mingzhong Cai   +4 more
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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
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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
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Sulfonated poly(ether ether ketone)/polyaniline composite proton-exchange membrane

Journal of Membrane Science, 2006
Abstract Sulfonated poly(ether ether ketone) (PEEK) was prepared by sulfonation of commercial Victrex@ PEEK and degree of sulfonation was found to be about 44.5% by 1H NMR. Sulfonated PEEK/polyaniline composite membranes, in order to prevent methanol crossover, were prepared by chemical polymerization of a thin layer of polyaniline (PANI) in the ...
R.K. Nagarale, G.S. Gohil, Vinod K. Shahi   +2 more
openaire   +1 more source