Controlled Microflow Cationic Polymerization of Vinyl Ethers under Ambient Conditions
Controlled Microflow Cationic Polymerization of Vinyl Ethers under Ambient Conditions
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DOI：
10.1016/j.cej.2022.134828
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发表时间：
2022-01
影响因子：
15.1
通讯作者：
Jiajia Li;Miao Chen;Xia Lin;Xiangqiang Pan;Zhengbiao Zhang;Jian Zhu
中科院分区：
文献类型：
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作者：
Jiajia Li;Miao Chen;Xia Lin;Xiangqiang Pan;Zhengbiao Zhang;Jian Zhu
活性阳离子聚合是一种成熟的制备分子量可控、结构复杂的聚合物的方法，但苛刻的聚合条件限制了其广泛应用。在这里，我们报告了一种简化各种乙烯基醚(包括乙基乙烯基醚(EVE)、丙基乙烯基醚(PVE)、丁基乙烯基醚(BVE)和异丁基乙烯基醚(IBVE))的传统活性阳离子聚合所需的严格条件的简便策略，该策略利用连续微流动反应器和弱Lewis酸氯化锌(ZnCl2)。在环境条件下，无需单体提纯、温度控制或严格的无水条件，即可获得相对分子质量可控、相对分子质量分布窄(<；1.20)、定义良好的聚合物。动力学实验和成功的谷氨酸链延伸证实了聚合反应的活性。
Living cationic polymerization is a well-established method for preparing polymers with controlled molecular weights and complex architectures, but rigorous polymerization conditions limit its widespread application. Here, we report a facile strategy for simplifying the strict conditions required for traditional living cationic polymerizations of various vinyl ethers including ethyl vinyl ether (EVE), propyl vinyl ether (PVE), butyl vinyl ether (BVE) and isobutyl vinyl ether (IBVE) by utilizing continuous microflow reactors and a weak Lewis acid, zinc chloride (ZnCl2). Well-defined polymers with controlled molecular weights and narrow molecular weight distributions (<1.20) can be obtained under ambient conditions without monomer purification, temperature control or strictly anhydrous conditions. The living nature of the polymerization was verified by kinetic experiments and successfulin situchain extension.