Synthesis of high molecular weight sulfonated poly(arylene ether sulfone) copolymer without azeotropic reaction
- Synthesis of high molecular weight sulfonated poly(arylene ether sulfone) copolymer without azeotropic reaction
- 이소영; 권연혜; 김보현; 채지언; 장종현; 헨켄스마이어디억; 유성종; 김진영; 김형준
- Azeotropic distillation; Electrolyte membranes; Proton exchange membrane fuel cells; Sulfonated poly(arylene ether sulfone)s; Dean-Stark apparatus
- Issue Date
- Solid state ionics
- VOL 275, 92-96
- Currently, most sulfonated poly(arylene ether sulfone) (s-PAES) polymers are synthesized using a solvent mixture consisting of toluene and dimethylacetamide (DMAc) by two successive reactions, namely azeotropic water removal, followed by nucleophilic substitution. In this study, a novel method for the synthesis of s-PAES polymers has been developed, where alcohols such as methanol, ethanol, or 2-propanol are used along with DMAc as the co-solvent in the place of toluene that is used in the conventional synthesis of s-PAES. Moreover, the synthesis method used in this study involves only one step, namely the polymerization at 160 °C and does not require the azeotropic water distillation step at 140 °C. The new synthesis method was found to yield s-PAES polymerswith a highermolecularweight in a shorter reaction time compared to the conventional polymerization method. Further, membrane electrode assemblies (MEA) were fabricated using the synthesized s-PAES polymer membranes, in order to evaluate the performance of themembranes in polymer electrolyte membrane fuel cells (PEMFCs). The results indicate that the s-PAES membranes synthesized using the method proposed in this study have a great potential for use as PEMFC membranes.
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