Self-Strengthening of Cross-Linked Elastomers via the Use of Dynamic Covalent Macrocyclic Mechanophores
Self-Strengthening of Cross-Linked Elastomers via the Use of Dynamic Covalent Macrocyclic Mechanophores
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DOI：
10.1021/acsmacrolett.1c00124
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发表时间：
2021-04-21
影响因子：
7.015
通讯作者：
Otsuka, Hideyuki
中科院分区：
文献类型：
--
作者：
Kida, Jumpei;Aoki, Daisuke;Otsuka, Hideyuki
在聚合物化学领域中，创造能够响应机械力而自增强的聚合物材料是一个重要目标。在这里，报告了使用包含动态共价二硫键的大环力学团对交联弹性体进行机械力化学增强。采用自由基聚合法合成了交联点插入大环力学团的交联型聚甲基丙烯酸己酯(CPHMA)聚合物。拉伸和溶胀测试表明，在CPHMA聚合物中添加大环机械载体后，成功地赋予了它们在压缩后的自我增强功能，而不需要任何添加剂，如单体和改性剂，或任何其他刺激。
The creation of polymeric materials that self-strengthen in response to a mechanical force is an important objective in the field of polymer chemistry. Here, the mechanochemical strengthening of cross- linked elastomers using macrocyclic mechanophores that contain a dynamic covalent disulfide bond is reported. Cross-linked poly(hexyl methacrylate) (CPHMA) polymers with macrocyclic mechanophores inserted at the cross-linking points were synthesized via free radical polymerization. Tensile and swelling tests showed that the addition of the macrocyclic mechanophores to the CPHMA polymers successfully impart them with self-strengthening functionality following compression, without the need for any additives such as monomers and modifiers, or any other stimuli.