Photoenzymatic RAFT Emulsion Polymerization with Oxygen Tolerance

• 作者: Ruo-Yu Li Ze-Sheng An
• 来源期刊: 高分子科学（英文版）
• 年，卷（期）: 2021,（9）
• 所属期刊栏目: ARTICLES
• 页码范围: 1138-1145
• 页数: 8页
• 语种: 英文

摘要

Photoenzymatic reversible addition-fragmenatation chain transfer(RAFT)emulsion polymerization,surfactant-free or ab initio,of various monomers is reported with oxygen tolerance.In surfactant-free emulsion polymerizatoin,poly(N,N-dimethylacrylamide)s were used as stabilizer blocks for emulsion polymerization of methyl acrylate,n-butyl acrylate and styrene,producing well-defined amphiphilic block copolymers,including those with an ultrahigh molecular weight,at quantitative conversions.The controlled character of surfactant-free emulsion polymerization was confirmed by kinetic studies,chain extension studies and GPC analyses.Temporal control was demonstrated by light ON/OFF experiments.In ab initio emulsion polymerization of methyl acrylate and methyl methacrylate,low-dispersity hydrophobic polymers were synthesized with predictable molecular weights.This study extends the monomer scope suitable for photoenzymatic RAFT polymerization from hydrophilic to hydrophobic monomers and demonstrates that oxygen-tolerance can be equally achieved for emulsion polymerization with excellent RAFT control.