Li Zhikai, Wang Jiabin, Li Xiaohong, Wang Ying, Fan Li-Juan, Yang Shuguang, Guo Mingyu, Li Xiaopeng, Tu Yingfeng
Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
Testing and Analysis Center, Soochow University, Suzhou 215123, China.
ACS Macro Lett. 2020 Nov 17;9(11):1655-1661. doi: 10.1021/acsmacrolett.0c00579. Epub 2020 Oct 28.
The strength and toughness are two trade-off properties of a material, yet 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). 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.
强度和韧性是材料的两个相互权衡的性能，但通过在体系中引入牺牲键可以实现强韧材料。在此，我们提出一种四组分多嵌段共聚物（mBCP）方法来制备强韧弹性纤维，即通过将三联吡啶部分引入聚（醚酯）mBCP弹性体中。与Fe(II)配位后，在物理交联的热塑性弹性体内形成超分子交联。具有双交联网络结构的增韧弹性纤维表现出高拉伸强度（约300 MPa）和韧性（约100 MJ/m）。此外，它们还具有优异的回弹性和增强的自愈性能。我们的策略为通过将金属-配体牺牲键引入mBCP弹性体来开发强韧弹性体提供了一条有前景的途径。
