Effect of thermal crosslinking on the properties of sulfonated poly(phenylene sulfone)s as proton conductive membranes

Yaojian Zhang; Je Deok Kim; Kenji Miyatake

doi:10.1002/app.44218

Effect of thermal crosslinking on the properties of sulfonated poly(phenylene sulfone)s as proton conductive membranes

Yaojian Zhang, Je Deok Kim^*, Kenji Miyatake

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

The synthesis and characterization of crosslinked aromatic polymer membranes with high ion exchange capacity (IEC) values are reported. Through aromatic nucleophilic substitution polycondensation and the subsequent sulfonation reaction, the highly sulfonated polymers SPPSU-2S and SPPSU-4S with high molecular weight (M_n = 138–145 kDa, M_w = 200–279 kDa) and well-defined structures were synthesized. By solution casting and thermal annealing treatment, flexible crosslinked membranes with high solvent insolubility were obtained. The membranes exhibited mechanical and chemical stability as confirmed by dynamic mechanical analysis (DMA) and conductivity measurement. The crosslinked SPPSU-4S membrane with IEC = 3.20 meq/g showed the highest proton conductivity of 0.163 S/cm at 120 °C, 90% RH, and improved thermal stability compared with its precursor (uncrosslinked) membrane. The results show that simple annealing method could improve significantly membranes properties of highly sulfonated aromatic polymers.

Original language	English
Article number	44218
Journal	Journal of Applied Polymer Science
Volume	133
Issue number	46
DOIs	https://doi.org/10.1002/app.44218
Publication status	Published - 2016 Dec 10
Externally published	Yes

Keywords

batteries and fuel cells
conducting polymers
crosslinking
membranes
polyelectrolytes

ASJC Scopus subject areas

Chemistry(all)
Surfaces, Coatings and Films
Polymers and Plastics
Materials Chemistry

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title = "Effect of thermal crosslinking on the properties of sulfonated poly(phenylene sulfone)s as proton conductive membranes",

abstract = "The synthesis and characterization of crosslinked aromatic polymer membranes with high ion exchange capacity (IEC) values are reported. Through aromatic nucleophilic substitution polycondensation and the subsequent sulfonation reaction, the highly sulfonated polymers SPPSU-2S and SPPSU-4S with high molecular weight (Mn = 138–145 kDa, Mw = 200–279 kDa) and well-defined structures were synthesized. By solution casting and thermal annealing treatment, flexible crosslinked membranes with high solvent insolubility were obtained. The membranes exhibited mechanical and chemical stability as confirmed by dynamic mechanical analysis (DMA) and conductivity measurement. The crosslinked SPPSU-4S membrane with IEC = 3.20 meq/g showed the highest proton conductivity of 0.163 S/cm at 120 °C, 90% RH, and improved thermal stability compared with its precursor (uncrosslinked) membrane. The results show that simple annealing method could improve significantly membranes properties of highly sulfonated aromatic polymers.",

keywords = "batteries and fuel cells, conducting polymers, crosslinking, membranes, polyelectrolytes",

author = "Yaojian Zhang and Kim, {Je Deok} and Kenji Miyatake",

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year = "2016",

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AU - Zhang, Yaojian

AU - Kim, Je Deok

AU - Miyatake, Kenji

PY - 2016/12/10

Y1 - 2016/12/10

N2 - The synthesis and characterization of crosslinked aromatic polymer membranes with high ion exchange capacity (IEC) values are reported. Through aromatic nucleophilic substitution polycondensation and the subsequent sulfonation reaction, the highly sulfonated polymers SPPSU-2S and SPPSU-4S with high molecular weight (Mn = 138–145 kDa, Mw = 200–279 kDa) and well-defined structures were synthesized. By solution casting and thermal annealing treatment, flexible crosslinked membranes with high solvent insolubility were obtained. The membranes exhibited mechanical and chemical stability as confirmed by dynamic mechanical analysis (DMA) and conductivity measurement. The crosslinked SPPSU-4S membrane with IEC = 3.20 meq/g showed the highest proton conductivity of 0.163 S/cm at 120 °C, 90% RH, and improved thermal stability compared with its precursor (uncrosslinked) membrane. The results show that simple annealing method could improve significantly membranes properties of highly sulfonated aromatic polymers.

AB - The synthesis and characterization of crosslinked aromatic polymer membranes with high ion exchange capacity (IEC) values are reported. Through aromatic nucleophilic substitution polycondensation and the subsequent sulfonation reaction, the highly sulfonated polymers SPPSU-2S and SPPSU-4S with high molecular weight (Mn = 138–145 kDa, Mw = 200–279 kDa) and well-defined structures were synthesized. By solution casting and thermal annealing treatment, flexible crosslinked membranes with high solvent insolubility were obtained. The membranes exhibited mechanical and chemical stability as confirmed by dynamic mechanical analysis (DMA) and conductivity measurement. The crosslinked SPPSU-4S membrane with IEC = 3.20 meq/g showed the highest proton conductivity of 0.163 S/cm at 120 °C, 90% RH, and improved thermal stability compared with its precursor (uncrosslinked) membrane. The results show that simple annealing method could improve significantly membranes properties of highly sulfonated aromatic polymers.

KW - batteries and fuel cells

KW - conducting polymers

KW - crosslinking

KW - membranes

KW - polyelectrolytes

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ER -

Effect of thermal crosslinking on the properties of sulfonated poly(phenylene sulfone)s as proton conductive membranes

Abstract

Keywords

ASJC Scopus subject areas

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