Clarifying the Mechanism of the Denisov Cycle: How do Hindered Amine Light Stabilizers Protect Polymer Coatings from Photo-oxidative Degradation?
Hindered amine light stabilizers (HALS) protect polymer coatings against photo-oxidative damage through the formation of nitroxide radicals, which subsequently consume damaging radical species in a process called the Denisov cycle. However, the exact mechanism for this process has been disputed, with a dozen different reaction pathways and over 30 individual reactions previously proposed in the literature. In this work, the full mechanism of the Denisov cycle is elucidated using high-level...[Show more]
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