Ogbonna Nduka D, Dearman Michael, Cho Cheng-Ta, Bharti Bhuvnesh, Peters Andrew J, Lawrence Jimmy
Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States.
Department of Chemical Engineering, Louisiana Tech University, Ruston, Louisiana 71272, United States.
JACS Au. 2022 Mar 18;2(4):898-905. doi: 10.1021/jacsau.2c00010. eCollection 2022 Apr 25.
As the complexity of polymer structure grows, so do the challenges for developing an accurate understanding of their structure-property relationships. Here, the synthesis of bottlebrush polymers with topologically precise and fully discrete structures is reported. A key feature of the strategy is the synthesis of discrete macromonomer libraries for their polymerization into topologically precise bottlebrushes that can be separated into discrete bottlebrushes ( = 1.0). As the system becomes more discrete, packing efficiency increases, distinct three-phase Langmuir-Blodgett isotherms are observed, and its glass transition temperature becomes responsive to side-chain sequence. Overall, this work presents a versatile strategy to access a range of precision bottlebrush polymers and unravels the impact of side-chain topology on their macroscopic properties. Precise control over side chains opens a pathway for tailoring polymer properties without changing their chemical makeup.
随着聚合物结构复杂性的增加，准确理解其结构与性能关系所面临的挑战也在增加。在此，报道了具有拓扑精确和完全离散结构的瓶刷聚合物的合成。该策略的一个关键特征是合成离散的大分子单体库，用于将其聚合成拓扑精确的瓶刷，这些瓶刷可以分离成离散的瓶刷（= 1.0）。随着体系变得更加离散，堆积效率提高，观察到明显的三相朗缪尔-布洛杰特等温线，并且其玻璃化转变温度对侧链序列有响应。总体而言，这项工作提出了一种通用策略，可用于获得一系列精确的瓶刷聚合物，并揭示侧链拓扑结构对其宏观性能的影响。对侧链的精确控制为在不改变聚合物化学组成的情况下调整聚合物性能开辟了一条途径。
