Multiphase design of autonomic self-healing thermoplastic elastomers
| Autor: | Aaron M. Kushner, Zhibin Nm Guan, George A. Williams, Yulin Chen |
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| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | Nature Chemistry. 4:467-472 |
| ISSN: | 1755-4349 1755-4330 |
| Popis: | The development of polymers that can spontaneously repair themselves after mechanical damage would significantly improve the safety, lifetime, energy efficiency and environmental impact of man-made materials. Most approaches to self-healing materials require the input of external energy, healing agents, solvent or plasticizer. Despite intense research in this area, the synthesis of a stiff material with intrinsic self-healing ability remains a key challenge. Here, we show a design of multiphase supramolecular thermoplastic elastomers that combine high modulus and toughness with spontaneous healing capability. The designed hydrogen-bonding brush polymers self-assemble into a hard-soft microphase-separated system, combining the enhanced stiffness and toughness of nanocomposites with the self-healing capability of dynamic supramolecular assemblies. In contrast to previous self-healing polymers, this new system spontaneously self-heals as a single-component solid material at ambient conditions, without the need for any external stimulus, healing agent, plasticizer or solvent. |
| Databáze: | OpenAIRE |
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