关键词: 羰游基介导聚合, 活性聚合, 自由基聚合, 阴离子开环聚合, 链式聚合

Abstract: Living polymerization is an important approach for achieving precise control over molecular weight, molecular weight distribution, and topological structure of polymers, and thus constitutes a key topic in the advanced polymer chemistry course. Here, a novel living polymerization method, ketyl mediated polymerization (KMP), is introduced. Through a single electron transfer reaction between α,β-unsaturated ketones and magnesium, a ketyl radical anion species is generated, which possesses both radical and anionic activities. This species can initiate the radical polymerization of styrene and the anionic ring-opening polymerization of caprolactone at different sites, respectively. By employing a single initiator unit, KMP enables two distinct polymerization mechanisms, thereby expanding the polymerization mode and providing a valuable teaching case for advanced polymer chemistry education. Incorporating KMP into the advanced polymer chemistry course helps students deepen their understanding of living polymerization, promotes the integration of classical organic reactions with modern polymerization methods, and offers strong support for cultivating innovative talents.

Key words: Ketyl Mediated Polymerization, Living Polymerization, Radical Polymerization, Anionic Ring-Opening Polymerization, Chain-Growth Polymerization