Healable, Reconfigurable, Reprocessable Thermoset Shape Memory Polymer with Highly Tunable Topological Rearrangement Kinetics
Autor: | Ning Zheng, Zizheng Fang, Qian Zhao, Tao Xie |
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Rok vydání: | 2017 |
Předmět: |
chemistry.chemical_classification
Materials science Kinetics Thermosetting polymer 02 engineering and technology Shape-memory alloy Polymer Plasticity 010402 general chemistry 021001 nanoscience & nanotechnology Topology 01 natural sciences 0104 chemical sciences Shape-memory polymer chemistry Covalent bond General Materials Science 0210 nano-technology |
Zdroj: | ACS Applied Materials & Interfaces. 9:22077-22082 |
ISSN: | 1944-8252 1944-8244 |
Popis: | The unique capability of topological rearrangement for dynamic covalent polymer networks has enabled various unusual properties (self-healing, solid-state plasticity, and reprocessability) that are not found in conventional thermosets. Achieving these properties in one network in a synergetic fashion can open up new opportunities for shape memory polymer. To accomplish such a goal, the freedom to tune topological rearrangement kinetics is critical. This is, however, challenging to achieve. In this work, two sets of dynamic bonds (urethane and hindered urea) are incorporated into a hybrid network for synthesizing shape memory poly(urea-urethane). By changing the bond ratio, networks with highly tunable topological rearrangement kinetics are obtained. Combining self-healing, solid-state plasticity, and reprocessability in one such shape memory network leads to unusual versatility in its shape-shifting performance. |
Databáze: | OpenAIRE |
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