期刊
RSC ADVANCES
卷 9, 期 13, 页码 7411-7419出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ra09838g
关键词
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资金
- National Natural Science Foundation of China [51773129, 51503130]
- Support Plan of Science and Technology Department of Sichuan Province, China [2017GZ0129, 2018SZ0174, 2019YFG0257]
- International Science and Technology Cooperation Program of Chengdu [2017-GH02-00068-HZ]
- Postdoctoral Research Foundation of Sichuan University [2018SCU12049]
- Graduate Student's Research and Innovation Fund of Sichuan University [2018YJSY084]
An intumescent flame retardant (DOPO-DAM) containing phosphorus and nitrogen was synthesized via a two-step process and then, it was incorporated into waterborne polyurethane to serve as a reactive flame retardant for preparing flame-retarded WPU (FR-WPU). The chemical structures of DOPO-DAM and FR-WPU were confirmed by H-1 NMR, P-31 NMR, and FTIR studies. The thermal stability, flame retardancy and mechanical properties of FR-WPU were investigated by TGA, TGA-FIR, Py-GC-MS, limiting oxygen index (LOI) test, SEM-EDS analysis, cone calorimeter test and a universal testing machine. The results showed that the conjugation of DOPO-DAM into WPU induced a slight decline in the thermal stability of FR-WPU. However, the incorporation of DOPO-DAM into WPU significantly enhanced the flame retardancy by reducing the heat release rate (HRR), total heat release (THR), smoke production rate (SPR) and total smoke production (TSP). In addition, the morphology, elemental composition and content of the residual char of the flame-retarded WPU indicated the important function of DOPO-DAM in the condensed phase. Thus, DOPO-DAM exhibited gas-phase and condensed-phase flame retardant effects on the WPU films.
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