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An advanced elastomer with an unprecedented combination of excellent mechanical properties and high self-healing capability

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Abstract

Rubbers are widely applied in tires, seals, biomedical materials and aerospace applications because of their unique high elasticity. However, combining high self-healing capability and excellent mechanical performance in a rubber remains a formidable challenge. In this work, inspired by the energy dissipation mechanism and the recoverability of sacrificial bonds, the authors describe a dual-dynamic network design of a high-performance elastomer in which weaker multiple hydrogen bonds and stronger Zn–triazole coordination have been engineered into an unvulcanized cis-1,4-polyisoprene (IR) matrix. Accordingly, the elastomer obtains high tensile strength (21 MPa) and toughness (60 MJ m−3). The facilitated chain orientation in such a dual-dynamic network is finely substantiated by the molecular dynamics simulation results. Significantly, this dual-dynamic network design enables a fully cut elastomer to be healed at mild temperature. Under healing at 80 °C for 24 h, the healed elastomer regains excellent mechanical properties (tensile strength of 15.5 MPa and fracture energy of 42.8 MJ m−3). We envision that this design concept can not only develop a new network construction method in rubbers instead of vulcanization, but also provide inspiration for preparing advanced elastomers with the combination of excellent mechanical performance and high self-healing capability.

Graphical abstract: An advanced elastomer with an unprecedented combination of excellent mechanical properties and high self-healing capability

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Publication details

The article was received on 19 Sep 2017, accepted on 23 Nov 2017 and first published on 05 Dec 2017


Article type: Paper
DOI: 10.1039/C7TA08255J
Citation: J. Mater. Chem. A, 2017, Advance Article
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    An advanced elastomer with an unprecedented combination of excellent mechanical properties and high self-healing capability

    J. Liu, J. Liu, S. Wang, J. Huang, S. Wu, Z. Tang, B. Guo and L. Zhang, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA08255J

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