链式转移
激进的
链式传播
化学
自由基聚合
钴介导的自由基聚合
动链长度
聚合
链端接
活性自由基聚合
可逆加成-断裂链转移聚合
光化学
聚合物
有机化学
作者
Yongjin Wang,Jiaman Du,Hanchu Huang
标识
DOI:10.1002/anie.202318898
摘要
Abstract Developing reversible‐deactivation radical polymerization (RDRP) methods that could directly control the thiyl radical propagation is highly desirable yet remains challenging in modern polymer chemistry. Here, we reported the first reversible thiyl radical addition‐fragmentation chain transfer (SRAFT) polymerization strategy, which utilizes allyl sulfides as chain transfer agents for reversibly deactivating the propagating thiyl radicals, thus allowing us to directly control a challenging thiyl radical chain polymerization to afford polymers with well‐defined architectures. A linear dependence of molecular weight on conversion, high chain‐end fidelity, and efficient chain extension proved good controllability of the polymerization. In addition, density functional theory calculations provided insight into the reversible deactivation ability of allyl sulfides. The SRAFT strategy developed in this work represents a promising platform for discovering new controlled polymerizations based on thiyl radical chemistry.
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