zwitterionic polymerisation

https://doi.org/10.1351/goldbook.15428
Chain polymerization in which a growing macromolecule bears two ionic chain carriers of opposite signs, at one or both of its ends.
Note: Chains in a zwitterionic polymerization may grow from one or both of their ends.
Source:
PAC, 2008, 80, 2163. (Glossary of terms related to kinetics, thermodynamics, and mechanisms of polymerization (IUPAC Recommendations 2008)) on page 2186 [Terms] [Paper]