zwitterionic polymer

Synonym: polymeric inner salt
https://doi.org/10.1351/goldbook.ZT07228
ampholytic polymer containing ionic groups of opposite sign, commonly on the same pendant groups.
Source:
PAC, 2006, 78, 2067. 'Terminology of polymers containing ionizable or ionic groups and of polymers containing ions (IUPAC Recommendations 2006)' on page 2074 (https://doi.org/10.1351/pac200678112067)