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Vitrimer-like elastomers with rapid stress-relaxation by high-speed carboxy exchange through conjugate substitution reaction

Author

Listed:
  • Natsumi Nishiie

    (Shinshu University)

  • Ryo Kawatani

    (Shinshu University)

  • Sae Tezuka

    (Shinshu University)

  • Miu Mizuma

    (Shinshu University)

  • Mikihiro Hayashi

    (Gokiso-cho Showa-ku)

  • Yasuhiro Kohsaka

    (Shinshu University
    Shinshu University)

Abstract

We report vitrimer-like elastomers that exhibit significantly fast stress relaxation using carboxy exchange via the conjugate substitution reaction of α-(acyloxymethyl) acrylate skeletons. This network design is inspired by a small-molecule model that shows the carboxy exchange reaction even at ambient temperature in the presence of 1,4-diazabicyclo[2.2.2]octane (DABCO). The acrylate and acrylic acid copolymers are cross-linked using bis[α-(bromomethyl)acrylates] and doped with 10 wt% DABCO, exhibiting processability to obtain a transparent film by hot pressing. The high-speed bond exchange in the network, validated by stress-relaxation tests, allows quick molding with household iron. In addition, the material is applied as an adhesion sheet for plastic and metal substrates. Because dynamic cross-linking with the proposed bond exchange mechanism can be implemented for any polymer bearing carboxyl pendants, our approach can be applied to versatile backbones, which must thus be meaningful in the practical sense.

Suggested Citation

  • Natsumi Nishiie & Ryo Kawatani & Sae Tezuka & Miu Mizuma & Mikihiro Hayashi & Yasuhiro Kohsaka, 2024. "Vitrimer-like elastomers with rapid stress-relaxation by high-speed carboxy exchange through conjugate substitution reaction," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-53043-5
    DOI: 10.1038/s41467-024-53043-5
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    References listed on IDEAS

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    1. Benjamin Klemm & Reece W. Lewis & Irene Piergentili & Rienk Eelkema, 2022. "Temporally programmed polymer – solvent interactions using a chemical reaction network," Nature Communications, Nature, vol. 13(1), pages 1-12, December.
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