Post Sulfonation of Polyetherimide by chlorosulfonic acid

The paper described the fabrication of Polyetherimide (PEI) was sulfonated by chlorosulfonic acid (CSA) for the first time. The presence of sulfonating groups were confirmed by FTIR. The sulfonated products were characterized by ion exchange capacity and water uptake measurement. The hydrophilicity of PEI was improved by the sulfonation. Water uptake and ion exchange capacity results showed that addition of chlorosulfonic acid to polyether imide (PEI) improve water uptake and ion exchange capacity (IEC).

Keywords:

Polyetherimide , Ion exchange capacity (IEC) , Water uptake