A well‐known approach toward mechanochromic polymers relies on the incorporation of excimer‐forming fluorophores into a matrix polymer and the disruption of aggregated chromophores when such materials undergo macroscopic mechanical deformation. However, the required aggregates and stress‐transfer processes have so far only been realized with select dye/polymer combinations. As demonstrated here, the utility of this approach can be extended by tethering an excimer‐forming cyano‐substituted oligo(p‐phenylene vinylene) fluorophore to the two ends of a telechelic poly(ethylene‐co‐butylene) and blending small amounts (0.1–2 wt%) of the resulting aggregachromic macromolecule into polymer matrices such as poly(ε‐caprolactone), poly(isoprene), or poly(styrene‐b‐butadiene‐b‐styrene). All blends display mechanofluorochromic responses, and the ratio between the monomer and excimer emission intensities can be used to correlate the luminescence signal to the extent of deformation and to follow subsequent relaxation processes. The developed approach significantly expands the scope of blend‐based mechanoresponsive luminescent materials.

中文翻译：

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基于形成准分子的远螯大分子的机械响应性，发光聚合物共混物

机械致变色聚合物的一种众所周知的方法依赖于将受激准分子形成的荧光团结合到基质聚合物中，以及当此类材料经历宏观机械变形时破坏聚集的发色团。但是，到目前为止，只有选择的染料/聚合物组合才能实现所需的聚集体和应力转移过程。如此处所示，可以通过将受激准分子形成的氰基取代的低聚对苯撑亚乙烯基荧光基团束缚在远螯聚（乙烯-共-丁烯）的两端并掺混少量（0.1所得的团聚变色大分子的–2 wt％）转变成聚合物基质，例如聚（ε-己内酯），聚（异戊二烯）或聚（苯乙烯-b）-丁二烯-b-苯乙烯）。所有共混物均表现出机械荧光色响应，并且单体与受激准分子发射强度之间的比率可用于使发光信号与变形程度相关并遵循随后的松弛过程。所开发的方法极大地扩展了基于共混物的机械响应发光材料的范围。