A novel branched phosphorus-containing flame retardant: synthesis and its application

3rd International Conference on Energy Equipment Science and Engineering

Zhang, Yi^1,2 ; Liu, Jiping^2 ; Li, Shulei^2

School of Biology and Chemical Engineering, Shandong Vocational College of Science and Technology, Weifang

261053, China^1

School of Material Science and Engineering, Beijing Institute of Technology, Beijing

100081, China^2

关键词: Flame retardant properties;    Fourier transform infrared;    Limiting Oxygen Index;    Melt polycondensation;    Nuclear Magnetic Resonance (NMR);    Peak heat release rates;    Synergistic action;    Vertical burning tests;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/128/1/012102/pdf
DOI  :  10.1088/1755-1315/128/1/012102

来源: IOP

【 摘 要 】

A novel branched polyphosphonate flame retardant (BPDD) has been synthesized through melt polycondensation and end-capping reaction. The chemical structure of BPDD was characterized by fourier transform infrared (FTIR) spectra and nuclear magnetic resonance (NMR) spectra. The test results of the vertical burning test (UL-94), limiting oxygen index (LOI) and cone calorimeter (CONE) measurements reveal that BPDD can effectively enhanced flame-retardant properties of EP. The LOI values of EP/BPDD composites increased from 23.9 % of pure EP to 33.6% and UL-94 V-0 was obtained with the 20 wt% BPDD loading. Besides, the peak heat release rate (PHRR) and total heat release (THR) of EP/BPDD composites were reduced significantly compared with the pure EP. When 20 wt% BPPD was incorporated, the PHRR and THR were decreased 66.2 % and 37.3%, respectively. The comprehensive test results shows that the improvement of flame retardancy of the EP/BPDD composites was attributed to the synergistic action of the condensed phase and gas phases.