Unraveling Polymer Structures with RAFT Polymerization and Diels–Alder Chemistry
Unraveling Polymer Structures with RAFT Polymerization and Diels–Alder Chemistry
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DOI：
10.1021/acs.macromol.8b01967
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发表时间：
2019-01
期刊：
影响因子：
5.5
通讯作者：
E. Wilborn;C. Gregory;Craig A. Machado;Taylor M. Page;W. Ramos;McKenzie A. Hunter;Kiersten M. Smith
中科院分区：
文献类型：
--
作者：
E. Wilborn;C. Gregory;Craig A. Machado;Taylor M. Page;W. Ramos;McKenzie A. Hunter;Kiersten M. Smith
利用Diels-Alders（DA）化学作为动态共价键，我们探索了包括星形材料和纳米凝胶在内的聚合物结构的动力学生长机制。可逆加成-断裂链转移（RAFT）聚合的使用允许精确控制聚合物主链内的DA键。控制分子内和分子间交联反应之间的竞争允许制备聚合物结构，所述聚合物结构可以在DA键裂解后膨胀它们的体积，如通过动态光散射（DLS）所确定的。从宏观上看，这类似于解开一个绳球结，通常被称为“猴子的拳头”。
Using Diels–Alders (DA) chemistry as a dynamic-covalent linkage, we explored the kinetic growth mechanism of polymer structures including starlike materials and nanogels. The use of reversible addition–fragmentation chain transfer (RAFT) polymerization allows for precise control of DA linkages within the polymer backbone. Controlling the competition between intra- and intermolecular cross-linking reactions allows for the preparation of polymer structures that can expand their volume after cleavage of the DA linkages as determined by dynamic light scattering (DLS). Macroscopically, this would be analogous to untying a rope ball knot, commonly termed a “monkey’s fist”.