超分子化学
超分子聚合物
聚合物
材料科学
胶粘剂
单体
共价键
离解(化学)
涂层
紫外线
二聚体
聚苯乙烯
高分子化学
纳米技术
化学工程
分子
高分子科学
复合材料
化学
光电子学
有机化学
图层(电子)
工程类
作者
Diederik W. R. Balkenende,Christophe Monnier,Gina L. Fiore,Christoph Weder
摘要
Abstract The reversible and dynamic nature of non-covalent interactions between the constituting building blocks renders many supramolecular polymers stimuli-responsive. This was previously exploited to create thermally and optically healable polymers, but it proved challenging to achieve high stiffness and good healability. Here we present a glass-forming supramolecular material that is based on a trifunctional low-molecular-weight monomer ((UPyU) 3 TMP). Carrying three ureido-4-pyrimidinone (UPy) groups, (UPyU) 3 TMP forms a dynamic supramolecular polymer network, whose properties are governed by its cross-linked architecture and the large content of the binding motif. This design promotes the formation of a disordered glass, which, in spite of the low molecular weight of the building block, displays typical polymeric behaviour. The material exhibits a high stiffness and offers excellent coating and adhesive properties. On account of reversible dissociation and the formation of a low-viscosity liquid upon irradiation with ultraviolet light, rapid optical healing as well as (de)bonding on demand is possible.
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