Direct Synthesis of Fully Sulfonated Polyarylenethioether Sulfones as Proton‐Conducting Polymers for Fuel Cells
Direct Synthesis of Fully Sulfonated Polyarylenethioether Sulfones as Proton‐Conducting Polymers for Fuel Cells
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DOI：
10.1002/marc.200600275
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发表时间：
2006-08
影响因子：
4.6
通讯作者：
Z. Bai;T. D. Dang
中科院分区：
文献类型：
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作者：
Z. Bai;T. D. Dang
以四亚甲基砜为溶剂，采用直接聚合法成功地合成了SPTES聚合物。SPTES聚合物的化学结构由FT-IR和NMR光谱证实。通过TGA表征了热稳定性，结果表明聚合物主链上的磺化基团在高达300 °C下是稳定的。在65°C和85%相对湿度下测得的质子电导率达到300 mS·cm-1以上。以N，N-二甲基乙酰胺为原料，采用溶液浇铸法制备了坚韧、韧性好的自支撑膜，表明SPTES聚合物具有优良的成膜性能和力学性能。将单官能单体引入聚合中以封端SPIES聚合物。封端基团在改善耐水性、氧化稳定性和保持质子传导性方面是有效的。
SPTES polymers have been successfully synthesized by direct polymerization using tetramethylene sulfone as the solvent. The chemical structures of the SPTES polymers are confirmed by FT-IR and NMR spectroscopy. The thermal stability is characterized by TGA, and the results show that the sulfonated groups on the polymer backbone are stable up to 300 °C. The measured proton conductivity reaches values above 300 mS·cm -1 at 65°C and 85% relative humidity. Tough, ductile, free-standing membranes have been fabricated by solution casting from N,N-dimethylacetamide, which indicates that the SPTES polymers have excellent membrane-forming capability and mechanical property. The mono-functional monomers are introduced into the polymerization to end-cap the SPIES polymers. The end-capping groups are effective in improving water resistance, oxidative stability, and retaining the proton conductivity.