Properties of Multiblock Sulfonated Poly(arylene ether sulfone)s Synthesized by Precise Controllable Post-sulfonation for Proton Exchange Membranes  

作　　者：Xing Chen Lei Xiao Xin-Sheng Qiu Kang-Cheng Chen 

机构地区：[1]School of Chemistry and Chemical Engineering,Beijing Institute of Technology,Beijing,100081,China

出　　处：《Chinese Journal of Polymer Science》2022年第7期754-763,共10页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.21306010)。

摘　　要：A series of multiblock sulfonated poly(arylene ether sulfone)s(SPAES)with various block lengths and predictable ion exchange capacity were synthesized from 4,4’-difluorodiphenyl sulfone,4,4’-dihydrodiphenyl sulfone and 4,4’-biphenol by one-pot and two-pot polymerization.;H-NMR and FTIR spectra confirmed the structure that sulfonic acid groups were introduced precisely on the poly(arylene ether sulfone)s by post-sulfonation which resulted in controllable sulfonation degree.The proton exchange membranes(PEMs)-based SPAES displayed excellent dimensional,thermal,antioxidant stability,proton conductivity and mechanical properties(maximum tensile stress>35 MPa).Thermogravimetric analysis indicated the prepared SPAES began to degrade above 310℃.The effects of polymerization processes,those were,one-pot hydrophobic segment process,one-pot hydrophilic segment process and two-pot process,on the properties of polymers were investigated.The proton conductivity and microphase separation of SPAES PEMs increased in order of those prepared by one-pot hydrophobic segment process,two-pot process and one-pot hydrophilic segment process.The highest conductivities of SPAES synthesized by the above processes under 80℃ and 100%relative humidity were 213(MS4),297(MB3)and 360 mS·cm^(-1)(MQ2),respectively.

关 键 词：Sulfonated poly(arylene ether sulfone)s(SPAES) Proton exchange membranes One-pot process Two-pot process Post-sulfonation 

分 类 号：TM911.4[电气工程—电力电子与电力传动]