3D Network Structural Poly (Aryl Ether Ketone)-Polybenzimidazole Polymer for High-Temperature Proton Exchange Membrane Fuel Cells

Figure 4

(a) Photographs and (b) gel content of membranes after the solubility test in NMP at 90°C for 12 h. (1) PBI, (2) PAEK-cr-PBI, and (3) PAEK-cr-PBI@PBI.

(a)

(b)