Research Article
Synthesis of Highly Sulfonated Poly(arylene ether) Containing Multiphenyl for Proton Exchange Membrane Materials
Table 1
IEC, water sorption, and dimensional stability of SP1 membranes.
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IEC determined by acid-base titration. Calculated assuming six sulfonic acid groups per monomer unit. The theoretical highest IEC value of SP1- is 4.38 mmol/g (degree of sulfonation: 100%). 80°C in water. Change in film length () and thickness () 80°C in water. Dissolved in water. |