期刊
POLYMER CHEMISTRY
卷 8, 期 19, 页码 2942-2952出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7py00215g
关键词
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资金
- Natural Sciences and Engineering Research Council (NSERC) of Canada
- Brock University Advanced Biomanufacturing Centre
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 H-1 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).
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