| abstract |
The polymer which introduce | transduced the sulfonic acid group or its derivative (s) is provided. The polymer comprises a unit represented by the following formula (1):n n n n n n n n Wherein R represents -A 1 -SO 2 R 1 ; A 1 is selected from an alkylene group, a heterocyclic ring and an aromatic ring; -SO 2 R 1 is a sulfonic acid group or a derivative of sulfonic acid; R 1w , R 1x and R 1y are as defined in the specification body). |