fig3

Figure 3. Comparison of theoretical IEC vs. experimental IEC for various AEM polymers. Theoretical IEC, calculated from the polymer’s chemical structure, is generally consistent with experimental values. This correlation is essential for predicting the performance of candidate polymers without the need for experimental synthesis. The plot includes various polymer classes: QPPO-x, ImPES-x, QPPO-10x, QAPEK-10x, ImPES-0.1x, and Polysulfone, each represented by different colors and markers. The dashed line represents the ideal case where theoretical and experimental IEC are equal (y = x). IEC: Ion exchange capacity; AEM: anion exchange membrane; QPPO: quaternized poly(phenylene) oxide.