Self‐Healing Polymer Networks Based on Reversible Michael Addition Reactions. Issue 22 (7th October 2016)

• Record Type: Journal Article
• Authors: Kuhl, Natascha; Geitner, Robert; Bose, Ranjita K.; Bode, Stefan; Dietzek, Benjamin; Schmitt, Michael; Popp, Jürgen; Garcia, Santiago J.; van der Zwaag, Sybrand; Schubert, Ulrich S.; Hager, Martin D.
• Is Part Of: Macromolecular chemistry and physics. Volume 217:Issue 22(2016:Nov.)
• Page Start: 2541
• Page End: 2550
• Publication Date: 2016-10-07
• Subjects: "click"‐reaction -- reversible Michael addition -- self‐healing materials -- self‐healing polymers -- thiol‐ene; Polymers -- Periodicals; Polymerization -- Periodicals; Synthetic products -- Periodicals; Macromolecules -- Periodicals; 547.7
• DOI: 10.1002/macp.201600353
• Languages: English
• ISSNs: 1022-1352

Abstract

Abstract : A new polymeric material utilizing a highly efficient as well as reversible thiol‐ene click reaction is presented. For this purpose, a trithiol is reacted with a bis benzylcyanoacetamide derivative resulting in the formation of a dynamic polymer network. The self‐healing ability of this novel material is tested by scratch healing experiments. Healing is found to take place from 60 °C onward. The underlying healing mechanism is studied in detail using temperature‐dependent Raman spectroscopy confirming the reversible opening of the thiol‐ene adducts. Additionally, the thermal and mechanical properties are investigated by differential scanning calorimetry, thermogravimetric analysis, and rheological measurements proving the network formation as well as its reversibility during the thermal treatment. Abstract : A new dynamic polymer network based on the reversible Michael addition of thiols and benzylcyanacetamides is presented. Due to this reversibility scratches applied to the material are healed at temperatures from 60 °C onward. The underlying healing mechanism is studied in detail using temperature‐dependent Raman spectroscopy.