聚合
链式转移
活性聚合
高分子化学
化学
活性阴离子聚合
烷基
聚合物
阳离子聚合
阴离子加成聚合
催化作用
自由基聚合
有机化学
作者
Masami Kamigaito,Mineto Uchiyama,Natsumi Ohira,Keiji Yamashita,Katsutoshi Sagawa
出处
期刊:Research Square - Research Square
日期:2023-11-28
标识
DOI:10.21203/rs.3.rs-3589509/v1
摘要
Abstract Living anionic polymerization is the most common living polymerization with the longest history whereas it generally requires stringent conditions and one metal initiator per polymer chain. Here, we present proton transfer anionic polymerization using acidic C–H bonds as dormant species and base catalysts for methacrylates via reversible chain transfer or termination of the growing enolate species. A weakly acidic compound such as an alkyl isobutyrate serves as the initiator or chain-transfer agent in the presence of a bulky potassium base catalyst to produce a polymer chain and thereby diminish the metal compound per chain ratio. An added alcohol serves as a reversible terminator to tame the propagation. End-functionalized, star, block, and graft polymers are easily accessible from compounds with C–H bonds.
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