ring-opening nucleophilic chain polymerization

https://doi.org/10.1351/goldbook.08983
Nucleophilic chain polymerization in which a cyclic monomer yields a monomeric unit that is either acyclic or contains fewer rings than the cyclic monomer.
Example:
Non-ionic monomers used in ring-opening nucleophilic chain polymerization include intramolecular anhydrides of N-carboxy amino acids (commonly referred to as N-carboxy anhydrides or NCAs).
Source:
PAC, 2022, 94, 1093. (Terminology for chain polymerization (IUPAC Recommendations 2021)) on page 1129 [Terms] [Paper]