Supramolecular thermoplastics and thermoplastic elastomer materials with self-healing ability based on oligomeric charged triblock copolymers

Lenny Voorhaar, Maria Mercedes Diaz, Frederic Leroux, Sarah Rogers, Artem M. Abakumov, Gustaaf Van Tendeloo, Guy Van Assche, Bruno Van Mele, Richard Hoogenboom

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Supramolecular polymeric materials constitute a unique class of materials held together by non-covalent interactions. These dynamic supramolecular interactions can provide unique properties such as a strong decrease in viscosity upon relatively mild heating, as well as self-healing ability. In this study we demonstrate the unique mechanical properties of phase-separated electrostatic supramolecular materials based on mixing of low molar mass, oligomeric, ABA-triblock copolyacrylates with oppositely charged outer blocks. In case of well-chosen mixtures and block lengths, the charged blocks are phase separated from the uncharged matrix in a hexagonally packed nanomorphology as observed by transmission electron microscopy. Thermal and mechanical analysis of the material shows that the charged sections have a Tg closely beyond room temperature, whereas the material shows an elastic response at temperatures far above this Tg ascribed to the electrostatic supramolecular interactions. A broad set of materials having systematic variations in triblock copolymer structures was used to provide insights in the mechanical properties and and self-healing ability in correlation with the nanomorphology of the materials.

Original languageEnglish
Article numbere385
JournalNPG Asia Materials
Volume9
Issue number5
DOIs
Publication statusPublished - 2017
Externally publishedYes

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