Sulfonated poly(arylene thioether ketone ketone sulfone)s for proton exchange membranes with high oxidative stability

e-Polymers ◽  
2005 ◽  
Vol 5 (1) ◽  
Author(s):  
Liping Shen ◽  
Guyu Xiao ◽  
Guoming Sun
Keyword(s):  
Oxidation Resistance ◽  
Proton Exchange Membranes ◽  
Exchange Capacity ◽  
Proton Exchange ◽  
Ion Exchange Capacity ◽  
Excellent Thermal Stability ◽  
Arylene Ether ◽  
Ether Ketone ◽  
High Oxidation Resistance ◽  
Sulfonated Poly

Abstract Sulfonated poly(arylene thioether ketone ketone sulfone)s (SPATKKS) were synthesized by nucleophilic polycondensation of various amounts of 1,3- bis(4-fluorobenzoyl)benzene, 1,3-bis(3-sodium sulfonate-4-fluorobenzoyl)benzene, and 4,4’-dichlorodiphenylsulfone with 4,4’-thiobisbenzenethiol. Sulfonated poly- (arylene ether ketone ketone sulfone)s were also prepared in order to compare their oxidation resistance to peroxides with that of SPATKKS. SPATKKS show high oxidation resistance to peroxides. The resulting ionomers with moderate ion exchange capacity present excellent thermal stability (the 5% weight loss temperature is about 500°C) and low water uptake and swelling ratio until 85°C. The materials hold promise for application as proton exchange membranes in fuel cells.

Characterization of Multiblock Sulfonated Poly(Arylene Ether Sulfone) as Proton Exchange Membranes

2013 ◽  
Vol 805-806 ◽  
pp. 1321-1324
Author(s):  
Hai Dan Lin ◽  
Xiao Ying Yang ◽  
Cheng Xun Sun
Keyword(s):  
Ion Exchange ◽  
Water Uptake ◽  
Proton Exchange Membranes ◽  
Exchange Capacity ◽  
Proton Exchange ◽  
Membrane Properties ◽  
Multiblock Copolymers ◽  
Arylene Ether ◽  
Ether Ketone ◽  
Sulfonated Poly

A new series of hydrophobic-hydrophilic multiblock sulfonated poly (arylene ether ketone)-b-poly (arylene ether ketone) copolymers were successfully synthesized and evaluated for use as proton exchange membranes (PEMs). The membrane properties of block copolymers including ion exchange capacities (IECs), water uptake and proton conductivities were characterized for the multiblock copolymers and compared with random sulfonated poly (arylene ether) s and other multiblock copolymer membranes at similar ion exchange capacity value. This series of multiblock copolymers showed moderate conductivities up to 0.063 S/cm at 80 °C with very low water uptake of 19%. Therefore, they are considered to be promising PEM materials for fuel cells.

Synthesis and Properties of Fluorenyl-Containing Multiblock Sulfonated Poly(Arylene Ether Sulfone) Membranes for Fuel Cell Applications

2011 ◽  
Vol 391-392 ◽  
pp. 308-312
Author(s):  
Shan Shan Chen ◽  
Jian Mei Liu ◽  
Ying Ling ◽  
Shi Chao Fang ◽  
Hui Yang ◽  
...  
Keyword(s):  
Coupling Reaction ◽  
Proton Exchange Membranes ◽  
Exchange Capacity ◽  
Proton Exchange ◽  
Water Stability ◽  
Multiblock Copolymers ◽  
Dmso Solution ◽  
Ion Exchange Capacity ◽  
Arylene Ether ◽  
Sulfonated Poly

A series of novel multiblock copolymers containing rigid hydrophilic/soft hydrophobic blocks were synthesized and evaluated for use as proton exchange membranes (PEMs). The multiblock copolymers were prepared by a coupling reaction between phenoxide-terminated sulfonated poly(arylene ether sulfone) oligomer (OSO) and fluorine-terminated poly(arylene ether sulfone) oligomer (FNO). All copolymers produced tough, flexible and transparent membranes by casting from DMSO solution. The resulting membranes displayed good water stability and enhanced proton conductivities comparable to that of the corresponding random ones with similar ion exchange capacity (IEC) values. They also showed slight anisotropic swelling behavior, while isotropic behavior for the random ones. The results revealed that these multiblock copolymers were potential candidates for PEM materials.

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