Sulfonation of Poly(aryletherketone): NMR Evidence for Multi-Regio Sulfonation and Membrane Properties
Sulfonated poly(ether ether ketone) (SPEEK) is a benchmark ionomer for nonfluorinated proton exchange membranes, yet its properties remain strongly dependent on the degree of sulfonation and relative humidity. In this work, SPEEK samples were synthesized using two distinct sulfonation routes: concentrated sulfuric ac...