https://doi.org/10.1351/goldbook.08907
Chain polymerization in which propagation involves reaction between a growing-chain end and an activated monomer.
Note: The activator in activated-monomer polymerization should not be referred to as a catalyst unless it is established that it is a catalyst.
Examples: Anion-activated polymerization of lactams, the cation-activated polymerization of cyclic ethers, and the Lewis acid-activated polymerization of lactones.