Tuning the Properties and Self-Healing Behavior of Ionically Modified Poly(isobutylene-co-isoprene) Rubber
| Autor: | Anton Mordvinkin, Gert Heinrich, Marcus Suckow, Brigitte Voit, Manta Roy, Nikhil K. Singha, Kay Saalwächter, Frank Böhme |
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| Rok vydání: | 2017 |
| Předmět: |
Isobutylene
Work (thermodynamics) Materials science Polymers and Plastics Proton Organic Chemistry Ionic bonding 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Inorganic Chemistry chemistry.chemical_compound chemistry Natural rubber Chemical engineering visual_art Self-healing Materials Chemistry visual_art.visual_art_medium 0210 nano-technology Material properties Isoprene |
| Zdroj: | Macromolecules. 51:468-479 |
| ISSN: | 1520-5835 0024-9297 |
| Popis: | The focus of this work is on the nature of self-healing of ionically modified rubbers obtained by reaction of brominated poly(isobutylene-co-isoprene) rubber (BIIR) with various alkylimidazoles such as 1-methylimidazole, 1-butylimidazole, 1-hexylimidazole, 1-nonylimidazole, and 1-(6-chlorohexyl)-1H-imidazole. Based on stress–strain and temperature dependent DMA measurements, a structural influence of the introduced ionic imidazolium moieties on the formation of ionic clusters and, as a consequence, on the mechanical strength and self-healing behavior of the samples could be evidenced. These results are fully supported by a molecular-level assessment of the network structure (cross-link and constraint density) and the dynamics of the ionic clusters using an advanced proton low-field NMR technique. The results show distinct correlations between the macroscopic behavior and molecular chain dynamics of the modified rubbers. In particular, it is shown that the optimization of material properties with regard to... |
| Databáze: | OpenAIRE |
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