Urethanes as reversible covalent moieties in self-healing polymers

N. Kuhl; M. Abend; R. Geitner; J. Vitz; Stefan Zechel; M. Schmitt; Jürgen Popp; Ulrich S. Schubert; Martin D. Hager

doi:10.1016/j.eurpolymj.2018.04.027

Urethanes as reversible covalent moieties in self-healing polymers

N. Kuhl, M. Abend, R. Geitner, J. Vitz, Stefan Zechel, M. Schmitt, Jürgen Popp, Ulrich S. Schubert, Martin D. Hager

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

For the first time, reversible covalent urethane units are used for the design of new self-healing polymers. For this purpose, an electron-poor diol was synthesized and utilized as crosslinker to create a dynamic polymer network. Therefore, the diol, butyl methacrylate as well as 2-isocyanato ethyl methacrylate are intermixed and photo-polymerized in a bone-shaped PTFE mold. The resulting test specimens are characterized by DSC, TGA and DMTA and the self-healing behavior is studied using tensile tests. Thereby, healing efficiencies of up to 85% could be reached while the material exhibits good mechanical properties with high E-moduli. Additionally, the self-healing mechanism, which is based on exchange reactions of the reversible urethane moieties, is investigated by Raman as well as temperature dependent IR measurements.

Original language	English
Pages (from-to)	45-50
Number of pages	6
Journal	European Polymer Journal
Volume	104
DOIs	https://doi.org/10.1016/j.eurpolymj.2018.04.027
Publication status	Published - 1 Jul 2018
Externally published	Yes

Keywords

Blocked isocyanates
Polyurethanes
Self-healing polymers

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10.1016/j.eurpolymj.2018.04.027

Cite this

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title = "Urethanes as reversible covalent moieties in self-healing polymers",

abstract = "For the first time, reversible covalent urethane units are used for the design of new self-healing polymers. For this purpose, an electron-poor diol was synthesized and utilized as crosslinker to create a dynamic polymer network. Therefore, the diol, butyl methacrylate as well as 2-isocyanato ethyl methacrylate are intermixed and photo-polymerized in a bone-shaped PTFE mold. The resulting test specimens are characterized by DSC, TGA and DMTA and the self-healing behavior is studied using tensile tests. Thereby, healing efficiencies of up to 85% could be reached while the material exhibits good mechanical properties with high E-moduli. Additionally, the self-healing mechanism, which is based on exchange reactions of the reversible urethane moieties, is investigated by Raman as well as temperature dependent IR measurements.",

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AU - Kuhl, N.

AU - Abend, M.

AU - Geitner, R.

AU - Vitz, J.

AU - Zechel, Stefan

AU - Schmitt, M.

AU - Popp, Jürgen

AU - Schubert, Ulrich S.

AU - Hager, Martin D.

PY - 2018/7/1

Y1 - 2018/7/1

N2 - For the first time, reversible covalent urethane units are used for the design of new self-healing polymers. For this purpose, an electron-poor diol was synthesized and utilized as crosslinker to create a dynamic polymer network. Therefore, the diol, butyl methacrylate as well as 2-isocyanato ethyl methacrylate are intermixed and photo-polymerized in a bone-shaped PTFE mold. The resulting test specimens are characterized by DSC, TGA and DMTA and the self-healing behavior is studied using tensile tests. Thereby, healing efficiencies of up to 85% could be reached while the material exhibits good mechanical properties with high E-moduli. Additionally, the self-healing mechanism, which is based on exchange reactions of the reversible urethane moieties, is investigated by Raman as well as temperature dependent IR measurements.

AB - For the first time, reversible covalent urethane units are used for the design of new self-healing polymers. For this purpose, an electron-poor diol was synthesized and utilized as crosslinker to create a dynamic polymer network. Therefore, the diol, butyl methacrylate as well as 2-isocyanato ethyl methacrylate are intermixed and photo-polymerized in a bone-shaped PTFE mold. The resulting test specimens are characterized by DSC, TGA and DMTA and the self-healing behavior is studied using tensile tests. Thereby, healing efficiencies of up to 85% could be reached while the material exhibits good mechanical properties with high E-moduli. Additionally, the self-healing mechanism, which is based on exchange reactions of the reversible urethane moieties, is investigated by Raman as well as temperature dependent IR measurements.

KW - Blocked isocyanates

KW - Polyurethanes

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Urethanes as reversible covalent moieties in self-healing polymers

Abstract

Keywords

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