Cornell University , Ithaca, New York 14853, United States.
J Am Chem Soc. 2016 Feb 17;138(6):1848-51. doi: 10.1021/jacs.5b13565. Epub 2016 Feb 2.
The breadth of the molecular weight distributions (MWD) of polymers influences their physical properties; however, no synthetic methods allow precise control of the exact shape and composition of a distribution. We report a modular strategy that enables deterministic control over polymer MWD through temporal regulation of initiation in nitroxide-mediated polymerization reactions. This approach is applicable to any controlled polymerization that uses a discrete initiator, and it allows the use of MWD composition as a parameter to tune material properties.
聚合物分子量分布（MWD）的宽度会影响其物理性质；然而，没有任何合成方法可以精确控制分布的形状和组成。我们报告了一种模块化策略，通过在氮氧自由基介导的聚合反应中对引发进行时间调节，从而实现对聚合物 MWD 的确定性控制。该方法适用于任何使用离散引发剂的可控聚合反应，并且可以使用 MWD 组成作为参数来调整材料性能。
