Polymer having a sulfonic group or a sulfonate group and an amide group and method of producing same

摘要

A polymer is provided in which a sulfonic group or a derivative thereof is introduced. The polymer includes a unit represented by the following chemical formula (1): wherein R represents -A₁-SO₂R₁; A₁ is selected from an alkylene group, a heterocyclic ring, an aromatic ring; and -SO₂R₁ is a sulfonic group or of a derivative of a sulfonic acid.