New stage in living cationic polymerization: An array of effective Lewis acid catalysts and fast living polymerization in seconds
New stage in living cationic polymerization: An array of effective Lewis acid catalysts and fast living polymerization in seconds
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DOI：
10.1002/pola.21995
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发表时间：
2007-05-15
影响因子：
--
通讯作者：
Kanaoka, Shokyoku
中科院分区：
文献类型：
--
作者：
Aoshima, Sadahito;Yoshida, Tomohide;Kanaoka, Shokyoku
我们最近对乙烯基醚阳离子聚合的弱碱刘易斯酸催化剂的广泛研究导致了前所未有的活性反应体系：1-3 s内的快速活性聚合;包含Al、Sn、Fe、Ti、Zr、Hf、Zn、Ga、In、Si、Ge和Bi的金属卤化物的广泛选择;以及Fe 2 O3的非均相催化活性聚合。为了稳定增长的碳阳离子而使用添加的碱和适当地选择刘易斯酸催化剂对于这种新型活性聚合的成功是至关重要的。此外，碱稳定的活性聚合允许通过聚合物连接反应定量合成具有窄分子量分布的星形聚合物，以及精确合成和自组装刺激响应性嵌段共聚物。(c)2007 Wiley Periodicals，Inc.
Our recent extensive research on Lewis acid catalysts with a weak base for the cationic polymerization of vinyl ethers led to unprecedented living reaction systems: fast living polymerization within 1-3 s; a wide choice of metal halides containing Al, Sn, Fe, Ti, Zr, Hf, Zn, Ga, In, Si, Ge, and Bi; and heterogeneously catalyzed living polymerization with Fe2O3. The use of added bases for the stabilization of the propagating carbocation and the appropriate selection of Lewis acid catalysts were crucial to the success of such new types of living polymerizations. In addition, the base-stabilized living polymerization allowed the quantitative synthesis of star-shaped polymers with a narrow molecular weight distribution via polymer-linking reactions and the precision synthesis and self-assembly of stimuli-responsive block copolymers. (c) 2007 Wiley Periodicals, Inc.