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A new approach has been proposed to obtain high-temperature proton exchange membranes based on novel cross-linked porous polybenzimidazole (PBI). The cross-linked porous PBI membranes (CpPBI) were prepared by leaching out a low-molecular-weight compound dibutyl phthalate and mixing 4,4′-diglycidyl (3,3′,5,5′-tetramethylbiphenyl) epoxy resin as a cross-linker. The porous PBI membranes (pPBI) were also...
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