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Synthesis of a self-healing siloxane-based elastomer cross-linked via a furan-modified polyhedral oligomeric silsesquioxane: investigation of a thermally reversible silicon-based cross-link

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Abstract

We have successfully prepared an elastomeric material exhibiting excellent temperature-controlled self-healing characteristics. A synthetic procedure is provided to graft siloxane chains with maleimidocarboxyphenyl functional groups. A furan-modified polyhedral oligomeric silsesquioxane with flexible tethers was also synthesized to cross-link the siloxane chains via a Diels–Alder reaction. A model system was prepared to study the thermally reversible nature of the cross-linked entities using differential scanning calorimetry (DSC) and nuclear magnetic resonance (NMR) experiments. Likewise, dynamic solid-state 1H NMR experiments confirmed the reversibility of the linkages in the polymeric materials. Elastomers that were completely severed could be reannealed to the point that signs of a defect were imperceptible even by scanning electron microscopy (SEM).

Graphical abstract: Synthesis of a self-healing siloxane-based elastomer cross-linked via a furan-modified polyhedral oligomeric silsesquioxane: investigation of a thermally reversible silicon-based cross-link

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Publication details

The article was received on 06 Feb 2017, accepted on 10 Apr 2017 and first published on 12 Apr 2017


Article type: Paper
DOI: 10.1039/C7PY00215G
Citation: Polym. Chem., 2017, Advance Article
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    Synthesis of a self-healing siloxane-based elastomer cross-linked via a furan-modified polyhedral oligomeric silsesquioxane: investigation of a thermally reversible silicon-based cross-link

    A. Nasresfahani and P. M. Zelisko, Polym. Chem., 2017, Advance Article , DOI: 10.1039/C7PY00215G

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