Excellent Toughening of 2,6-Diaminopyridine Derived Poly (Urethane Urea) via Dynamic Cross-Linkages and Interfering with Hydrogen Bonding of Urea Groups from Partially Coordinated Ligands
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials and Synthesis
2.2. Methods
2.2.1. Preparation of Films
2.2.2. Mechanical Properties Tests
2.2.3. Stress-Relaxation Tests
2.2.4. Fourier Transform Infrared Spectroscopy (FTIR)
2.2.5. UV-vis Spectroscopy
3. Results and Discussion
3.1. Mechanical Properties
3.2. FTIR Spectroscopic Analysis
3.3. UV-vis Spectroscopic Analysis
3.4. Analysis of Cyclic Tensile Tests
3.5. Analysis of Stress-Strain Behavior
3.6. Analysis of Stress Relaxation
3.7. Mechanism of Toughening
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Sun, A.; Guo, W.; Zhang, J.; Li, W.; Liu, X.; Zhu, H.; Li, Y.; Wei, L. Excellent Toughening of 2,6-Diaminopyridine Derived Poly (Urethane Urea) via Dynamic Cross-Linkages and Interfering with Hydrogen Bonding of Urea Groups from Partially Coordinated Ligands. Polymers 2019, 11, 1320. https://doi.org/10.3390/polym11081320
Sun A, Guo W, Zhang J, Li W, Liu X, Zhu H, Li Y, Wei L. Excellent Toughening of 2,6-Diaminopyridine Derived Poly (Urethane Urea) via Dynamic Cross-Linkages and Interfering with Hydrogen Bonding of Urea Groups from Partially Coordinated Ligands. Polymers. 2019; 11(8):1320. https://doi.org/10.3390/polym11081320
Chicago/Turabian StyleSun, Ailing, Wenjuan Guo, Jinping Zhang, Wenjuan Li, Xin Liu, Hao Zhu, Yuhan Li, and Liuhe Wei. 2019. "Excellent Toughening of 2,6-Diaminopyridine Derived Poly (Urethane Urea) via Dynamic Cross-Linkages and Interfering with Hydrogen Bonding of Urea Groups from Partially Coordinated Ligands" Polymers 11, no. 8: 1320. https://doi.org/10.3390/polym11081320