Oxygen-Initiated and Regulated Controlled Radical Polymerization under Ambient Conditions
Oxygen-Initiated and Regulated Controlled Radical Polymerization under Ambient Conditions
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DOI：
10.1002/anie.201805212
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发表时间：
2018-07-20
影响因子：
16.6
通讯作者：
Pan, Xiangcheng
中科院分区：
文献类型：
--
作者：
Lv, Chunna;He, Congze;Pan, Xiangcheng
在常温、常压条件下进行了氧引发可控自由基快速聚合反应。三乙基硼烷与氧的反应产生乙基自由基，乙基自由基引发和介导自由基聚合。使用RAFT链转移剂（CTA）实现了可控自由基聚合，无需任何脱氧过程，在短时间（15分钟）内提供了几乎完全转化（> 95%）的定义良好的聚合物。通过高通量筛选，发现了各种CTA和单体的适宜条件。为了证明该方法的通用性，通过高通量合成技术在1小时内合成了包含25种定义明确的不同组成（嵌段共聚物和统计共聚物）和分子量的聚合物库。利用这种方法开发了一种聚合物涂膜技术，形成具有空间控制和良好的分子量和分散性控制的薄膜。
A rapid oxygen-initiated and -regulated controlled radical polymerization was conducted under ambient temperature and atmosphere. The reaction between triethylborane and oxygen provides ethyl radicals, which initiate and mediate the radical polymerization. The controlled radical polymerization was achieved using RAFT chain transfer agents (CTA) without any process of removing oxygen, providing well-defined polymers with almost full conversion (> 95%) in a short period (15 min). High-throughput screening was used to discover the suitable conditions for various CTA and monomers. To show the versatility of this method, a polymer library containing 25 well-defined polymers with different compositions (block and statistical copolymers) and molecular weights were synthesized in 1h via high-throughput synthesis technique. A polymer-painting technique was developed using this method, forming films with spatial control and excellent control in molecular weight and dispersity.