New insights into the mechanical and self-healing properties of polymers cross-linked by Fe(iii )-2,6-pyridinedicarboxamide coordination complexes
Autor: | Cheng-Hui Li, Jian-Cheng Lai, Ke-Yu Zeng, Sheng-Ran Mo, Jing-Lin Zuo, Da-Peng Wang |
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Rok vydání: | 2019 |
Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Bond strength Ligand Organic Chemistry Bioengineering 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry 0104 chemical sciences Crystallography chemistry Self-healing Mechanical strength 0210 nano-technology |
Zdroj: | Polymer Chemistry. 10:362-371 |
ISSN: | 1759-9962 1759-9954 |
DOI: | 10.1039/c8py01233d |
Popis: | In order to understand the mechanical and self-healing properties of polymers cross-linked by Fe(III)-2,6-pyridinedicarboxamide (pdca) coordination complexes, herein we performed the reaction between 2,6-pyridinedicarboxamide and FeCl3 under both neutral and alkaline conditions, and studied the dynamic ligand exchange properties of the resulting model complexes. The results showed that [Fe(Hpdca)]+ exhibited a rapid ligand exchange property which was not observed for [Fe(pdca)]−. Correspondingly, polymer Fe-Hpdca-PBCA (PBCA = poly(butadiene-co-acrylonitrile)) was weak, highly stretchable and self-healable, while Fe-pdca-PBCA was strong and poorly stretchable and can only be partially healed with a prolonged time. These results deliver a clear indication of the important impact of the bond strength and dynamics of coordination complexes on the mechanical and self-healing properties of polymers. Such an understanding is helpful for further design of novel synthetic polymers which can achieve an optimal balance between the mechanical strength and self-healing performance. |
Databáze: | OpenAIRE |
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