Controlled Radical Polymerization: from Oxygen Inhibition and Tolerance to Oxygen Initiation
Controlled Radical Polymerization: from Oxygen Inhibition and Tolerance to Oxygen Initiation
复制标题
受控自由基聚合：从氧抑制和耐受到氧引发
DOI：
10.1007/s10118-021-2597-9
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发表时间：
2021-07-22
影响因子：
4.3
通讯作者：
Pan, Xiang-Cheng
中科院分区：
文献类型：
--
作者：
Li, Ning;Pan, Xiang-Cheng
Molecular oxygen is a radical scavenger in both conventional and controlled radical polymerization (CRP), resulting in many time-consuming methods for physically removing oxygen before the polymerization. Different approaches have been developed to have oxygen tolerance by chemically consuming or converting molecular oxygen into non-initiating species to address this issue. Recently, we propose another approach called oxygen initiation that directly transforms molecular oxygen into the initiating carbon radical in CRP. This feature article summarizes our recent developments in this direction. Oxygen-initiated reversible addition-fragmentation transfer (RAFT) polymerization has been successfully conducted using oxygen and trialkylborane as co-initiators under the ambient conditions and atmosphere without any prior degassed procedures. This gas-triggered initiation provides the opportunity for spatiotemporal control of the polymerization by molecular oxygen or air. Rationally synthesized alkylborane compounds could derive the predesigned structure of the initiating alkyl radical to minimize the side reactions and free polymer chains, achieving the synthesis of ultra-high molecular weight polymers. The challenges and perspectives are also discussed in the end.
