One-Shot Synthesis and Melt Self-Assembly of Bottlebrush Copolymers with a Gradient Compositional Profile,ACS Macro Letters

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One-Shot Synthesis and Melt Self-Assembly of Bottlebrush Copolymers with a Gradient Compositional Profile
ACS Macro Letters ( IF 5.1 ) Pub Date : 2018-05-15 00:00:00 , DOI: 10.1021/acsmacrolett.8b00273
Liuyin Jiang ₁ , Dmytro Nykypanchuk ₂ , Alexander E Ribbe ₃ , Javid Rzayev ₁

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Morphological control plays a central role in soft materials design. Herein, we report the synthesis of a gradient bottlebrush architecture and its role in directing molecular packing in the solid state. Bottlebrush copolymers with gradient interfaces were prepared via one-shot ring-opening metathesis polymerization of exo- and endo-norbornene-capped macromonomers. Kinetic studies revealed a gradient compositional profile separating the two blocks along the backbone. Side-chain symmetric gradient bottlebrush copolymers exhibited a strong tendency to assemble into cylindrical microstructures, in contrast to their block copolymer analogs with sharp interfaces. Such exquisite architectural control of the interfacial composition affords a delicate handle to direct macromolecular assembly.

中文翻译：

具有梯度成分分布的瓶刷共聚物的一次性合成和熔融自组装

形态控制在软材料设计中起着核心作用。在这里，我们报告了梯度瓶刷结构的合成及其在指导固态分子堆积中的作用。通过外-和内-降冰片烯封端的大分子单体的一次性开环复分解聚合制备具有梯度界面的瓶刷共聚物。动力学研究揭示了沿着主干分离两个块的梯度组成分布。与具有尖锐界面的嵌段共聚物类似物相比，侧链对称梯度瓶刷共聚物表现出强烈的组装成圆柱形微结构的趋势。对界面组成的这种精致的结构控制为指导大分子组装提供了一个微妙的句柄。

更新日期：2018-05-15

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