Increased stability in self-healing polymer networks based on reversible Michael addition reactions

Natascha Kuhl; Robert Geitner; Jürgen Vitz; Stefan Bode; Michael Schmitt; Jürgen Popp; Ulrich S. Schubert; Martin D. Hager

doi:10.1002/app.44805

Increased stability in self-healing polymer networks based on reversible Michael addition reactions

Natascha Kuhl, Robert Geitner, Jürgen Vitz, Stefan Bode, Michael Schmitt, Jürgen Popp, Ulrich S. Schubert, Martin D. Hager^*

^*Corresponding author for this work

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

Abstract

A reversible thiol-ene click reaction is utilized to design novel self-healing polymers. These materials are based on a new methacrylate monomer featuring a benzylcyanoacetamide derivative, which is copolymerized with butyl methacrylate. Afterwards, the crosslinking is performed by the addition of a dithiol and a tetrathiol, respectively. Self-healing behavior is obtained by heating the crosslinked polymers to 100 °C (150 °C) for several hours and is monitored by scratch healing experiments utilizing an optical microscope. The thermal properties are studied in detail by differential scanning calorimetry as well as thermogravimetric analysis. Moreover, depth-sensing indentation measurements are performed to determine the mechanical properties. The healing process is based on the reversible cleavage/closing of the bonds (i.e., thiol-ene reaction), which could be demonstrated by Raman spectroscopy.

Original language	English
Article number	44805
Journal	Journal of Applied Polymer Science
Volume	134
Issue number	19
DOIs	https://doi.org/10.1002/app.44805
Publication status	Published - 15 May 2017
Externally published	Yes

Funding

The authors thank the Deutsche Forschungsgemeinschaft (DFG, SPP 1568; projects PO563/25?2, HA6306/3?1, and SCHU1229/13?1) for financial support. Authors acknowledge the NMR-platform of the Friedrich Schiller University Jena for support in NMR spectroscopy. Moreover, authors thank Renzo Paulus for his help with the DSC and TGA measurements.

Keywords

Michael addition
reversible covalent bonds
self-healing polymers
thiol-ene

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10.1002/app.44805

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abstract = "A reversible thiol-ene click reaction is utilized to design novel self-healing polymers. These materials are based on a new methacrylate monomer featuring a benzylcyanoacetamide derivative, which is copolymerized with butyl methacrylate. Afterwards, the crosslinking is performed by the addition of a dithiol and a tetrathiol, respectively. Self-healing behavior is obtained by heating the crosslinked polymers to 100 °C (150 °C) for several hours and is monitored by scratch healing experiments utilizing an optical microscope. The thermal properties are studied in detail by differential scanning calorimetry as well as thermogravimetric analysis. Moreover, depth-sensing indentation measurements are performed to determine the mechanical properties. The healing process is based on the reversible cleavage/closing of the bonds (i.e., thiol-ene reaction), which could be demonstrated by Raman spectroscopy.",

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AU - Kuhl, Natascha

AU - Geitner, Robert

AU - Vitz, Jürgen

AU - Bode, Stefan

AU - Schmitt, Michael

AU - Popp, Jürgen

AU - Schubert, Ulrich S.

AU - Hager, Martin D.

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AB - A reversible thiol-ene click reaction is utilized to design novel self-healing polymers. These materials are based on a new methacrylate monomer featuring a benzylcyanoacetamide derivative, which is copolymerized with butyl methacrylate. Afterwards, the crosslinking is performed by the addition of a dithiol and a tetrathiol, respectively. Self-healing behavior is obtained by heating the crosslinked polymers to 100 °C (150 °C) for several hours and is monitored by scratch healing experiments utilizing an optical microscope. The thermal properties are studied in detail by differential scanning calorimetry as well as thermogravimetric analysis. Moreover, depth-sensing indentation measurements are performed to determine the mechanical properties. The healing process is based on the reversible cleavage/closing of the bonds (i.e., thiol-ene reaction), which could be demonstrated by Raman spectroscopy.

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Increased stability in self-healing polymer networks based on reversible Michael addition reactions

Abstract

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Keywords

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