Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 147, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2021.106453
Keywords
Mechanical performance; Flame retardancy; Triazine-based covalent organic framework; TPU composite films
Funding
- Iranian National Science Foundation (INSF)
- Research Affairs Division of the Isfahan University of Technology (IUT) , Iran
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This study synthesized a flame-retardant triazine-based covalent organic framework (FT-COF) to improve the mechanical properties and fire safety of TPU. The addition of FT-COF significantly enhanced the thermal stability of TPU and reduced its flammability, offering a new plan for industrial applications.
In this study, we decided to synthesize a flame-retardant triazine-based covalent organic framework (FT-COF) via solvothermal reaction, to improve the fire safety and mechanical properties of thermoplastic polyurethane (TPU). By adding 3.0 wt% of FT-COF, the tensile strength and elongation of TPU increased by 69% and 12%, respectively. After incorporating of FT-COF nanoparticles, the thermal stability of TPU was significantly improved that resulted in the increasing of char residue up to 158% for TPU/FT-COF 3%. With addition of 3.0 wt % FT-COF, the peak heat release rate, total heat release of TPU composite were dramatically decreased by 51.6% and 47.3%, respectively. Besides, the TPU/FT-COF 3% indicated distinct reductions in the total smoke release (41.1%) and the peak of carbon monoxide production rate (43.53%). This study offers a new plan to outstandingly reducing the flammability of TPU, thus developing its industrial usage.
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