Results 181 to 190 of about 11,637 (219)
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Journal of Analytical and Applied Pyrolysis, 2011
Thermal degradation of SPEEK membranes is studied by coupling thermogravimetric analysis (TGA) and mass spectrometry (MS). Main mass losses can be attributed to water evaporation, desulfonation and oxidative pyrolysis of polymer main chain. The analysis can be used to determine the degree of sulfonation (DS) and the degree of cross-linking (DCL ...
P. Knauth +4 more
semanticscholar +3 more sources
Thermal degradation of SPEEK membranes is studied by coupling thermogravimetric analysis (TGA) and mass spectrometry (MS). Main mass losses can be attributed to water evaporation, desulfonation and oxidative pyrolysis of polymer main chain. The analysis can be used to determine the degree of sulfonation (DS) and the degree of cross-linking (DCL ...
P. Knauth +4 more
semanticscholar +3 more sources
, 2021
A composite adsorbent coating on Al6061 aluminum substrate, based on SAPO34 zeolite filler and sulfonate poly (ether-ether ketone) (S-PEEK) matrix is proposed for sustainable energy saving technologies.
D. Palamara +3 more
semanticscholar +1 more source
A composite adsorbent coating on Al6061 aluminum substrate, based on SAPO34 zeolite filler and sulfonate poly (ether-ether ketone) (S-PEEK) matrix is proposed for sustainable energy saving technologies.
D. Palamara +3 more
semanticscholar +1 more source
Journal of Membrane Science, 2018
Abstract Composite cation exchange membranes (C-CEMs) based on mainchain sulfonated polyether sulfone (SPES) and polyvinyl pyrrolidone (PVP) have been prepared and the effects of hydrophilicity on C-CEM properties investigated in a previous work. In this study, membrane properties were optimized by investigating the effects of degrees of sulfonation (
Jinli Zhao, Lin Guo, Jianyou Wang
openaire +1 more source
Abstract Composite cation exchange membranes (C-CEMs) based on mainchain sulfonated polyether sulfone (SPES) and polyvinyl pyrrolidone (PVP) have been prepared and the effects of hydrophilicity on C-CEM properties investigated in a previous work. In this study, membrane properties were optimized by investigating the effects of degrees of sulfonation (
Jinli Zhao, Lin Guo, Jianyou Wang
openaire +1 more source
Platelet adhesion onto microcapsule membranes with different degrees of sulfonation
Journal of Biomedical Materials Research, 1983AbstractMicrocapsules having different numbers of sulfonic acid groups on their surfaces were prepared by the interfacial polycondensation method. Platelets adhered to these capsules, and the rate and degree of platelet adhesion were found to be remarkable on those microcapsules that had high surface charge compared to those with low surface charge ...
N, Muramatsu, T, Kondo
openaire +2 more sources
International journal of hydrogen energy, 2018
A new hybrid based polyphosphazene backbone is synthesized via a series of reactions (ring opening of polyphosphazene, bromination, grafting groups, Atom transfer radical polymerization (ATRP) and sulfonation) with a controlled degree of sulfonation. The
A. Ouadah +3 more
semanticscholar +1 more source
A new hybrid based polyphosphazene backbone is synthesized via a series of reactions (ring opening of polyphosphazene, bromination, grafting groups, Atom transfer radical polymerization (ATRP) and sulfonation) with a controlled degree of sulfonation. The
A. Ouadah +3 more
semanticscholar +1 more source
Polymer Degradation and Stability, 2010
Abstract Initial decomposition temperature ( T i ), apparent activation energy of degradation ( E a ) and glass transition temperature ( T g ) of some low molar mass ( M n ≈ 8000 g mol −1 ) sulfonated poly(arylene ethersulfone)s s -(PAES) s were determined to check their dependence on sulfonation degree ( SD ).
L. ABATE +4 more
openaire +2 more sources
Abstract Initial decomposition temperature ( T i ), apparent activation energy of degradation ( E a ) and glass transition temperature ( T g ) of some low molar mass ( M n ≈ 8000 g mol −1 ) sulfonated poly(arylene ethersulfone)s s -(PAES) s were determined to check their dependence on sulfonation degree ( SD ).
L. ABATE +4 more
openaire +2 more sources
European Polymer Journal, 2020
Abstract Series of partially sulfonated poly(F-STs-co-ST) copolymers and poly(TFMST-ter-ST-ter-FMST) terpolymer have been successfully synthesized via post-sulfonation method using acetyl sulfate as a sulfonating agent. The identical and mild sulfonation conditions with a controlled sulfonation degree (SD) in the range of 18-27 mol%, were designed ...
Joanna Wolska +1 more
openaire +1 more source
Abstract Series of partially sulfonated poly(F-STs-co-ST) copolymers and poly(TFMST-ter-ST-ter-FMST) terpolymer have been successfully synthesized via post-sulfonation method using acetyl sulfate as a sulfonating agent. The identical and mild sulfonation conditions with a controlled sulfonation degree (SD) in the range of 18-27 mol%, were designed ...
Joanna Wolska +1 more
openaire +1 more source
, 2020
This work presents polymer composite based chemiresistive type carbon dioxide (CO2) gas sensors using different degree of sulfonated poly (ether ether ketone) (SPEEK) incorporated with diethanolamine (DEA)-functionalized multi-wall carbon nanotubes (d ...
Souvik Bag, K. Pal
semanticscholar +1 more source
This work presents polymer composite based chemiresistive type carbon dioxide (CO2) gas sensors using different degree of sulfonated poly (ether ether ketone) (SPEEK) incorporated with diethanolamine (DEA)-functionalized multi-wall carbon nanotubes (d ...
Souvik Bag, K. Pal
semanticscholar +1 more source