A brief review of 'schizophrenic' block copolymers
A brief review of 'schizophrenic' block copolymers
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DOI：
10.1016/j.reactfunctpolym.2005.07.021
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发表时间：
2006-01-01
影响因子：
5.1
通讯作者：
Armes, SP
中科院分区：
文献类型：
--
作者：
Butun, V;Liu, S;Armes, SP
综述了近年来“精神分裂症”水溶性嵌段共聚物的合成进展。在这个新的子领域中，最初的报道涉及到一种基于甲基丙烯酸叔胺的AB二嵌段共聚物，这种共聚物通过基团转移聚合合成，对pH和盐都有响应，可以在水溶液中形成a核或b核胶束。第二个例子涉及通过原子转移自由基聚合（ATRP）合成的聚（环氧丙烷）-甲基丙烯酸叔胺二嵌段共聚物，该共聚物具有pH和热响应行为。最近，已经报道了几个完全ph响应的两性离子二嵌段共聚物（通过ATRP制备，通常使用保护基团化学）的例子，其水溶液行为具有不同程度的精度特征。本文还讨论了纯热响应型二嵌段共聚物的合成和表征，以及ABC三嵌段共聚物的第一个例子，该共聚物仅通过调整溶液ph就能在20℃的水溶液中形成“三位一体”胶束。在这个引人注意的最后一个例子中，三种胶束的核心分别由疏水力、多离子络合和氢键形成。(c) 2005 Elsevier B.V.版权所有
Recent progress in the synthesis of so-called 'schizophrenic' water-soluble block copolymers is reviewed. The original report in this new sub-field involved a tertiary amine methacrylate-based AB diblock copolymer synthesized by group transfer polymerization that was both pH- and salt-responsive, allowing the formation of either A-core or B-core micelles in aqueous solution. A second example involved a poly(propylene oxide)-tertiary amine methacrylate diblock copolymer synthesized via atom transfer radical polymerization (ATRP) that exhibited both pH- and thermo-responsive behavior. More recently, several examples of wholly pH-responsive zwitterionic diblock copolymers (prepared via ATRP, usually using protecting group chemistry) have been reported, with their aqueous solution behavior being characterized with varying degrees of precision. The synthesis and characterization of purely thermo-responsive diblock copolymers is also discussed, along with the first example of an ABC triblock copolymer that is capable of forming a 'trinity' of micelles in aqueous solution at 20 degrees C simply by adjusting the solution pH. In this remarkable final example, the cores of the three types of micelles are formed by hydrophobic forces, polyion complexation and hydrogen bonding, respectively. (c) 2005 Elsevier B.V. All rights reserved.