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Dynamic urea bond for the design of reversible and self-healing polymers

Author

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  • Hanze Ying

    (University of Illinois at Urbana–Champaign)

  • Yanfeng Zhang

    (University of Illinois at Urbana–Champaign)

  • Jianjun Cheng

    (University of Illinois at Urbana–Champaign)

Abstract

Polymers bearing dynamic covalent bonds may exhibit dynamic properties, such as self-healing, shape memory and environmental adaptation. However, most dynamic covalent chemistries developed so far require either catalyst or change of environmental conditions to facilitate bond reversion and dynamic property change in bulk materials. Here we report the rational design of hindered urea bonds (urea with bulky substituent attached to its nitrogen) and the use of them to make polyureas and poly(urethane-urea)s capable of catalyst-free dynamic property change and autonomous repairing at low temperature. Given the simplicity of the hindered urea bond chemistry (reaction of a bulky amine with an isocyanate), incorporation of the catalyst-free dynamic covalent urea bonds to conventional polyurea or urea-containing polymers that typically have stable bulk properties may further broaden the scope of applications of these widely used materials.

Suggested Citation

  • Hanze Ying & Yanfeng Zhang & Jianjun Cheng, 2014. "Dynamic urea bond for the design of reversible and self-healing polymers," Nature Communications, Nature, vol. 5(1), pages 1-9, May.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4218
    DOI: 10.1038/ncomms4218
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    Cited by:

    1. Jing Chen & Yiyang Gao & Lei Shi & Wei Yu & Zongjie Sun & Yifan Zhou & Shuang Liu & Heng Mao & Dongyang Zhang & Tongqing Lu & Quan Chen & Demei Yu & Shujiang Ding, 2022. "Phase-locked constructing dynamic supramolecular ionic conductive elastomers with superior toughness, autonomous self-healing and recyclability," Nature Communications, Nature, vol. 13(1), pages 1-12, December.
    2. Yan Mei Li & Ze Ping Zhang & Min Zhi Rong & Ming Qiu Zhang, 2022. "Tailored modular assembly derived self-healing polythioureas with largely tunable properties covering plastics, elastomers and fibers," Nature Communications, Nature, vol. 13(1), pages 1-10, December.

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