Topological alternation from structurally adaptable to mechanically stable crosslinked polymer
| Autor: | Wei-Hsun Hu, Ta-Te Chen, Ryo Tamura, Kei Terayama, Siqian Wang, Ikumu Watanabe, Masanobu Naito |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
20 Organic and soft materials (colloids
liquid crystals gel polymers) Quantitative Biology::Biomolecules covalent adaptable network polymer topological alternation 301 Chemical syntheses / processing < 300 Processing / Synthesis and Recycling TA401-492 General Materials Science Materials of engineering and construction. Mechanics of materials Organic and Soft Materials (Colloids Liquid Crystals Gel Polymers) 501 Chemical analyses < 500 Characterization TP248.13-248.65 Research Article shape-morphing polymer material creep deformation Biotechnology |
| Zdroj: | Science and Technology of Advanced Materials, Vol 23, Iss 1, Pp 66-75 (2022) Science and Technology of Advanced Materials article-version (VoR) Version of Record |
| DOI: | 10.6084/m9.figshare.18159513 |
| Popis: | Stimuli-responsive polymers with complicated but controllable shape-morphing behaviors are critically desirable in several engineering fields. Among the various shape-morphing materials, cross-linked polymers with exchangeable bonds in dynamic network topology can undergo on-demand geometric change via solid-state plasticity while maintaining the advantageous properties of cross-linked polymers. However, these dynamic polymers are susceptible to creep deformation that results in their dimensional instability, a highly undesirable drawback that limits their service longevity and applications. Inspired by the natural ice strategy, which realizes creep reduction using crystal structure transformation, we evaluate a dynamic cross-linked polymer with tunable creep behavior through topological alternation. This alternation mechanism uses the thermally triggered disulfide–ene reaction to convert the network topology – from dynamic to static – in a polymerized bulk material. Thus, such a dynamic polymer can exhibit topological rearrangement for thermal plasticity at 130°C to resemble typical dynamic cross-linked polymers. Following the topological alternation at 180°C, the formation of a static topology reduces creep deformation by more than 85% in the same polymer. Owing to temperature-dependent selectivity, our cross-linked polymer exhibits a shape-morphing ability while enhancing its creep resistance for dimensional stability and service longevity after sequentially topological alternation. Our design enriches the design of dynamic covalent polymers, which potentially expands their utility in fabricating geometrically sophisticated multifunctional devices. Graphical abstract |
| Databáze: | OpenAIRE |
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