Supramolecular and Physically Double-Cross-Linked Network Strategy toward Strong and Tough Elastic Fibers,ACS Macro Letters

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Supramolecular and Physically Double-Cross-Linked Network Strategy toward Strong and Tough Elastic Fibers
ACS Macro Letters ( IF 5.1 ) Pub Date : 2020-10-28 , DOI: 10.1021/acsmacrolett.0c00579
Zhikai Li ₁ , Jiabin Wang ₁ , Xiaohong Li ₁ , Ying Wang ₂ , Li-Juan Fan ₁ , Shuguang Yang ₃ , Mingyu Guo ₁ , Xiaopeng Li ₄ , Yingfeng Tu ₁

Affiliation

The strength and toughness are two trade-off properties of a material, yet Nature can achieve strong and tough materials by introducing sacrificial bonds into a system. Here, we present a four-component multiblock copolymer (mBCP) approach toward strong and tough elastic fibers, by introducing terpyridine moieties into poly(ether ester) mBCP elastomers. After coordination with Fe(II), supramolecular cross-links are formed within the physically cross-linked thermoplastic elastomers. The toughening elastic fibers with a double-cross-linked network structure show high tensile strength (ca. 300 MPa) and toughness (ca. 100 MJ m^–3). In addition, they display excellent resilience with enhanced self-healing properties. Our strategy provides a promising way for the development of strong and tough elastomers by introducing metal–ligand sacrificial bonds into mBCPs elastomers.

中文翻译：

强韧弹性纤维的超分子和物理双交联网络策略

强度和韧性是材料的两个权衡属性，但大自然可以通过将牺牲键引入系统来获得坚固而坚韧的材料。在这里，我们通过将三联吡啶部分引入聚（醚酯）mBCP 弹性体中，提出了一种针对强韧弹性纤维的四组分多嵌段共聚物 (mBCP) 方法。与 Fe(II) 配位后，在物理交联的热塑性弹性体中形成超分子交联。具有双交联网络结构的增韧弹性纤维显示出较高的抗拉强度（约 300 MPa）和韧性（约 100 MJ m ^–3）。此外，它们还具有出色的回弹性和增强的自愈性能。我们的策略通过在 mBCPs 弹性体中引入金属-配体牺牲键，为开发强韧弹性体提供了一种有前景的方法。

更新日期：2020-11-17

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