Synthesis and performance of three flame retardant additives containing diethyl phosphite/phenyl phosphonic moieties |
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| Affiliation: | 1. Anhui Province Key Laboratory of Optoelectric Materials Science and Technology, Department of Physics, Anhui Normal University, Wuhu, Anhui 241000, China;2. State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China;1. College of Textile and Clothing Engineering, Soochow University, 199 Renai Road, Suzhou 215123, China;2. Key Laboratory of Flame Retardancy Finishing of Textile Materials (CNTAC), Soochow University, 199 Renai Road, Suzhou 215123, China;3. Jiangsu Sunshine Group Co. Ltd, Sunshine Industrial Park, Jiangyin 214426, China;1. Tianjin Key Laboratory of Hazardous Waste Safety Disposal and Recycling Technology, School of Environmental Science and Safety Engineering, Tianjin University of Technology, 391 Binshui Xidao, Xiqing District, Tianjin 300384, China;2. State Power Environmental Protection Research Institute, Nanjing 210031, China;3. Tianjin Nengpu Science and Technology Co., Ltd, Huading New Area 1-2-10, Haitai Inovation 6 Road, Huayuan Industrial Park, Tianjin 300384, China;4. Tianjin Fire Research Institute of the Ministry of Emergency Management, Tianjin 300381, China |
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| Abstract: | Three novel intumescent flame retardants (IFRs) containing phosphorus and nitrogen based on Schiff bases, poly(phosphonate ester(s)) (designated as PAB, PEB, and PPB), were synthesized and characterized. Thermal stability and flammability properties of ethylene-vinyl acetate copolymer (EVA)/30% IFRs blends were investigated by thermogravimetric analysis (TGA), limited oxygen index (LOI), vertical burning test (UL-94) and microscale combustion calorimetry (MCC). The results from UL-94 showed that EVA/IFRs blends all could reach V-2 rating. The addition of PAB into EVA reduced the PHRR value by 31%, and the LOI value increased from 19 to 24. Scanning electron microscope (SEM) observation results indicated that the existence of the cohesive charred layer on the surface of the residue was responsible for the improvement of the flame retardancy of EVA. |
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| Keywords: | Poly(phosphonate ester) Schiff base Flame retardant Ethylene-vinyl acetate |
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