Term: pseudo-ionic polymerization
https://doi.org/10.1351/goldbook.09007

Definition:
Polymerization proceeding by insertion of a monomer into a polar bond without the generation of ions.

Notes:
1) Most pseudo-ionic polymerizations involve concerted (e.g., four- or multi-centre) mechanisms of propagation.
2) The term pseudo-ionic polymerization has been most often used in connection with ring-opening polymerization.

Link: 

Source: PAC, 2022, 94, 1093. 'Terminology for chain polymerization (IUPAC Recommendations 2021)' on page 1139 (https://doi.org/10.1515/pac-2020-1211)

Citation: 'pseudo-ionic polymerization' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.09007

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