The fascinating pulley effect from moveable α‐cyclodextrin (α‐CD) based polyrotaxane favors toughening of hydrogels, but the strategy is rarely applied in bulk polymers because of the severe aggregation trend of α‐CDs. Herein, the authors propose a simple approach to moderately modify the α‐CDs of polyrotaxane by introducing large steric side groups and reactive CC so as to minimize the unwanted hydrogen bonds‐induced aggregation of α‐CDs and hydrophilicity of polyrotaxane. Accordingly, the proof‐of‐concept material, poly(methyl acrylate) crosslinked by the modified polyrotaxane, turns out to be rather homogeneous with optical transparency. The polyrotaxane crosslinks are movable under external force as disclosed by in situ small‐angle X‐ray scattering and other techniques, which is correlated to the relative amount of α‐CDs. A few polyrotaxane crosslinkers prove to be sufficient to simultaneously improve strength and toughness of poly(methyl acrylate) owing to the stress equalization. The present work provides an expandable toolbox for enhancing polymers.

中文翻译：

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在透明本体聚合物中同时增强和增韧聚轮烷的滑轮效应的实现。

可移动的基于α-环糊精（α-CD）的聚轮烷的引人入胜的滑轮效应有利于水凝胶的增韧，但由于α-CD的严重聚集趋势，该策略很少用于本体聚合物。本文作者提出了一种简单的方法，通过引入较大的空间侧基和反应性CC适度修饰聚轮烷的α-CD，以最大程度地减少由不需要的氢键引起的α-CD的聚集和聚轮烷的亲水性。因此，通过改性聚轮烷交联的概念验证材料聚丙烯酸甲酯证明是相当均匀的，具有光学透明性。如原位小角度X射线散射和其他技术所揭示，聚轮烷交联键可在外力作用下移动，这与α-CD的相对含量有关。事实证明，由于应力均衡，一些聚轮烷交联剂足以同时提高聚丙烯酸甲酯的强度和韧性。本工作提供了用于增强聚合物的可扩展工具箱。