Ultrafast RAFT polymerization: multiblock copolymers within minutes
Ultrafast RAFT polymerization: multiblock copolymers within minutes
复制标题
DOI：
10.1039/c4py01251h
复制
发表时间：
2015-01-01
影响因子：
4.6
通讯作者：
Perrier, Sebastien
中科院分区：
文献类型：
--
作者：
Gody, Guillaume;Barbey, Raphael;Perrier, Sebastien
多嵌段共聚物的合成通常被认为具有合成挑战性且耗时。在这篇文章中，报道了一种非常有效和通用的程序的开发，通过可逆加成-断裂链转移（RAFT）聚合来获得多嵌段共聚物。本报告通过使用不常见的实验条件制备多嵌段共聚物，证明了 RAFT 工艺的稳健性和多功能性。每个嵌段的合成均在空气存在下进行，仅需要 3 分钟即可达到接近完全的单体转化。这种方法消除了对溶液脱氧的必要性，并允许在很短的时间内获得复杂的共聚物结构。例如，该工艺只需 21 分钟即可制备出具有明确结构的七嵌段均聚物。我们还讨论了这种方法固有的局限性。当针对低聚合度（DP < 20）的嵌段时，该策略被证明特别有效。对于具有较高 DP (DP > 50) 的嵌段，该程序通常仅限于制备二嵌段或三嵌段共聚物。
The synthesis of multiblock copolymers is often considered to be synthetically challenging and time consuming. In this contribution, the development of a remarkably efficient and versatile procedure to access multiblock copolymers via reversible addition-fragmentation chain transfer (RAFT) polymerization is reported. The robustness and versatility of the RAFT process are demonstrated in this report by preparing multiblock copolymers using uncommon experimental conditions. The synthesis of each block was performed in the presence of air and only required 3 minutes to reach near full monomer conversion. This approach removes the necessity to deoxygenate the solution and allows access to complex copolymer structures in very short time periods. For example, this process allowed the preparation of a heptablock homopolymer with a well-defined architecture in just 21 minutes. We also discuss the limitations inherent to this approach. This strategy is shown to be particularly efficient when blocks with low degrees of polymerization (DP < 20) are targeted. For blocks with higher DPs (DP > 50), the procedure is typically limited to the preparation of di- or triblock copolymers.