chain activation

in SRMP
synonyms: activation (in SRMP), unimolecular activation, unimolecular chain activation
https://doi.org/10.1351/goldbook.08941
Unimolecular dissociation of a dormant species to form a mediating agent and a propagating species.
Notes:
  1. In aminoxyl-mediated radical polymerization [nitroxide-mediated polymerization (NMP)], the dormant species is an alkoxyamine and the mediating agent is an aminoxyl radical.
  2. In organometallic-mediated radical polymerization (OMRP), the domant species and the mediating agent are organometallic species.
  3. In reversible addition-fragmentation radical polymerization (RAFRP), the dormant species is a stable radical and the mediating agent is a non-propagating olefin, e.g., 1,1-diphenylethylene.
  4. Chain deactivation (in SRMP) is the reverse of chain activation (in SRMP).
Source:
PAC, 2022, 94, 1093. (Terminology for chain polymerization (IUPAC Recommendations 2021)) on page 1117 [Terms] [Paper]
Citation: 'chain activation' 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.08941 RIS BibTex EndNote
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