Interconvertible Living Radical and Cationic Polymerization through Reversible Activation of Dormant Species with Dual Activity
作者:Hiroshi Aoshima、Mineto Uchiyama、Kotaro Satoh、Masami Kamigaito
DOI:10.1002/anie.201406590
日期:2014.10.6
different stimuli, that is, a radical initiator and a Lewis acid, are used to activate the common dormant CSC(S)Z group into radical and cationic species, thereby inducing interconvertible radical and cationic copolymerization of acrylate and vinyl ether to produce a copolymer chain that consists of radically and cationically polymerized segments. The dual reversible activation provides control over molecular
乙烯基单体的聚合通常需要选择合适的单一中间体,而在共聚中,共聚单体的选择受到中间体的限制。在本文中,我们提出了可相互转化的双重活性物质,该物质可以通过不同的机制连接共聚单体,从而在单个聚合物链中产生特定的共聚单体序列。更具体地说,两种不同的刺激,即自由基引发剂和路易斯酸,被用来激活共同的休眠C。SC(S)Z基团分为自由基和阳离子种类,从而诱导丙烯酸酯和乙烯基醚的可相互转化的自由基和阳离子共聚,以生成由自由基和阳离子聚合的链段组成的共聚物链。双向可逆活化可控制分子量和链段长度可调的多嵌段共聚物。