Provided is a composition including a polyarylene ether polymer or
copolymer comprising a zwitterionic, group. The zwitterionic group can
derive from a zwitterionic precursor such as
4-(2-hydroxyethyl)-1-piperazine ethane sulfonic acid and comprises at
least one atom of sulfur, phosphorus, or nitrogen. Embodiments also
relate to an article, made from the composition, such as a membrane.