Preparation and Application of Aromatic Polymer Proton Exchange Membrane with Low-Sulfonation Degree

Table 2

Ion exchange capacity of the aromatic polymer proton exchange membrane.

Polymers	Measurements (mmol/g)	Theoretical value (mmol/g)
SPES-30	1.86	1.85
SPES-50	2.12	2.11
SPTES-30	2.28	2.27
SPTES-50	2.06	2.05
Nafion-117	2.31	2.30