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Rheology of vitrimers

Author

Listed:
  • Fanlong Meng

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Mohand O. Saed

    (University of Cambridge
    Cambridge Smart Plastics Ltd.)

  • Eugene M. Terentjev

    (University of Cambridge
    Cambridge Smart Plastics Ltd.)

Abstract

We describe the full rheology profile of vitrimers, from small deformation (linear) to large deformation (non-linear) viscoelastic behaviour, providing concise analytical expressions to assist the experimental data analysis, and also clarify the emerging insights and rheological concepts in the subject. We identify the elastic-plastic transition at a time scale comparable to the life-time of the exchangeable bonds in the vitrimer network, and propose a new method to deduce material parameters using the Master Curves. At large plastic creep, we describe the strain thinning when the material is subjected to a constant stress or force, and suggest another method to characterize the material parameters from the creep curves. We also investigate partial vitrimers including a permanent sub-network and an exchangeable sub-network where the bond exchange occurs. In creep, such materials can exhibit either strain thinning or strain thickening, depending on applied load, and present the phase diagram of this response.

Suggested Citation

  • Fanlong Meng & Mohand O. Saed & Eugene M. Terentjev, 2022. "Rheology of vitrimers," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-33321-w
    DOI: 10.1038/s41467-022-33321-w
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    References listed on IDEAS

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    1. Masaki Nakahata & Yoshinori Takashima & Hiroyasu Yamaguchi & Akira Harada, 2011. "Redox-responsive self-healing materials formed from host–guest polymers," Nature Communications, Nature, vol. 2(1), pages 1-6, September.
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