Simple and safe liquid seal approach to oxygen-tolerant ATRP
Simple and safe liquid seal approach to oxygen-tolerant ATRP
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简单、安全的耐氧 ATRP 液体密封方法
DOI：
10.1016/j.eurpolymj.2022.111720
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发表时间：
2022-11-26
影响因子：
6
通讯作者：
Pan, Xiangcheng
中科院分区：
文献类型：
--
作者：
Du, Yuxuan;He, Congze;Pan, Xiangcheng
微量氧对传统的可逆失活自由基聚合(RDRP)是致命的，需要通过严格的除氧操作或添加外部组分(需要后处理)来消除氧的影响。在这里，我们报告了一个由液体密封建立的开放系统中氧气溶解的有效势垒。本文采用液体石蜡和锂基润滑脂两种不同的液体密封材料。锂基润滑脂材料可以在高搅拌速度(450 Rpm)下稳定地隔离氧气，以强化反应过程中的热量和质量传递过程。有效的原子转移自由基聚合(ATRP)可以通过简单地添加厚度为5 mm的液体密封材料来辅助，从而提供高转化率(~gt；=90%)、可控的相对分子质量、窄的相对分子质量分布(MW/Mn)的聚合物
Trace oxygen is fatal to the conventional reversible deactivation radical polymerization (RDRP), so it is necessary to eliminate the influence of oxygen through some strict deoxygenation operations or by adding external com-ponents (post-treatment required). Here, we report the effective barrier of oxygen dissolution in an open system built by a liquid seal. Two different liquid seal materials, liquid paraffin and lithium grease, are used in this work. Lithium grease materials can stably isolate oxygen at a high stirring speed (450 rpm) to intensify the heat and mass transfer processes during the reaction. An effective atom transfer radical polymerization (ATRP) could be assisted by simply adding liquid seal materials with a thickness of 5 mm, providing polymers with high con-version (>= 90 %), controlled molecular weight, narrow molecular weight distribution (Mw/Mn