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Covalent Mechanochemistry and Contemporary Polymer Network Chemistry: A Marriage in the Making
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2023-01-04 , DOI: 10.1021/jacs.2c09623
Evan M Lloyd 1 , Jafer R Vakil 1, 2 , Yunxin Yao 1, 2 , Nancy R Sottos 2, 3 , Stephen L Craig 1, 2
Affiliation  

Over the past 20 years, the field of polymer mechanochemistry has amassed a toolbox of mechanophores that translate mechanical energy into a variety of functional responses ranging from color change to small-molecule release. These productive chemical changes typically occur at the length scale of a few covalent bonds (Å) but require large energy inputs and strains on the micro-to-macro scale in order to achieve even low levels of mechanophore activation. The minimal activation hinders the translation of the available chemical responses into materials and device applications. The mechanophore activation challenge inspires core questions at yet another length scale of chemical control, namely: What are the molecular-scale features of a polymeric material that determine the extent of mechanophore activation? Further, how do we marry advances in the chemistry of polymer networks with the chemistry of mechanophores to create stress-responsive materials that are well suited for an intended application? In this Perspective, we speculate as to the potential match between covalent polymer mechanochemistry and recent advances in polymer network chemistry, specifically, topologically controlled networks and the hierarchical material responses enabled by multi-network architectures and mechanically interlocked polymers. Both fundamental and applied opportunities unique to the union of these two fields are discussed.

中文翻译:

共价机械化学与当代高分子网络化学:一场正在酝酿中的联姻

在过去的 20 年里,聚合物机械化学领域积累了一个机械工具箱,可以将机械能转化为从颜色变化到小分子释放的各种功能反应。这些富有成效的化学变化通常发生在几个共价键 (Å) 的长度尺度上,但需要大量的能量输入和微观到宏观尺度的应变才能实现甚至低水平的机械团活化。最小的激活阻碍了将可用的化学反应转化为材料和设备应用。机械团活化挑战激发了化学控制另一个长度尺度的核心问题,即:决定机械团活化程度的聚合物材料的分子尺度特征是什么?更远,我们如何将聚合物网络化学的进步与机械细胞的化学相结合,以创造出非常适合预期应用的应力响应材料?在这个观点中,我们推测共价聚合物机械化学与聚合物网络化学的最新进展之间的潜在匹配,特别是拓扑控制网络和多网络架构和机械互锁聚合物实现的分层材料响应。讨论了这两个领域联合所特有的基础和应用机会。我们推测共价聚合物机械化学与聚合物网络化学的最新进展之间的潜在匹配,特别是拓扑控制网络和多网络架构和机械互锁聚合物实现的分层材料响应。讨论了这两个领域联合所特有的基础和应用机会。我们推测共价聚合物机械化学与聚合物网络化学的最新进展之间的潜在匹配,特别是拓扑控制网络和多网络架构和机械互锁聚合物实现的分层材料响应。讨论了这两个领域联合所特有的基础和应用机会。
更新日期:2023-01-04
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