A Robust Self-healing Polyurethane Elastomer Enabled by Tuning the Molecular Mobility and Phase Morphology through Disulfide Bonds
| Autor: | Zhaoyang Yuan, Hai-Tao Wu, Guangsu Huang, Bi-Qiang Jin, Zhenxing Cao, Lu-Sheng Liao, Jinrong Wu, Wen-Qiang Wu, Wei-Hang Li, Hao Wang, Yue Huang |
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| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Toughness Materials science Polymers and Plastics General Chemical Engineering Organic Chemistry Polymer Elastomer Alicyclic compound chemistry.chemical_compound chemistry Chemical engineering Self-healing Ultimate tensile strength Isophorone diisocyanate Polyurethane |
| Zdroj: | Chinese Journal of Polymer Science. 39:1299-1309 |
| ISSN: | 1439-6203 0256-7679 |
| DOI: | 10.1007/s10118-021-2607-y |
| Popis: | Elastomers with outstanding strength, toughness and healing efficiency are highly promising for many emerging fields. However, it is still a challenge to integrate all these beneficial features in one elastomer. Herein, an asymmetric alicyclic structure adjacent to aromatic disulfide was tactfully introduced into the backbone of polyurethane (PU) elastomer. Specifically, such elastomer (PU-HPS) was fabricated by polycondensing polytetramethylene ether glycol (PTMEG), isophorone diisocyanate (IPDI) and p-hydroxydiphenyl disulfide (HPS) via one-pot method. The molecular mobility and phase morphology of PU-HPS can be tuned by adjusting the HPS content. Consequently, the dynamic exchange of hydrogen and disulfide bonds in the hard segment domains can also be tailored. The optimized sample manifests outstanding tensile strength (46.4 MPa), high toughness (109.1 MJ/m3), high self-healing efficiency after fracture (90.3%), complete scratch recovery (100%) and good puncture resistance. Therefore, this work provides a facile strategy for developing robust self-healing polymers. |
| Databáze: | OpenAIRE |
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