期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 363, 期 -, 页码 1-9出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2018.08.090
关键词
Biodegradable material; Poly(lactic acid); Phosphorous-nitrogen containing flame retardant; Fire safety; Flame retardant mechanism
资金
- Shandong Province Key Research and Development Plan of China (Public Welfare Project) [2017GGX20135]
- Shandong Province Natural Science Foundation of China [2016ZRBM17]
- National Natural Science Foundation of China [21104038, 51773104]
Flame-retarded poly(lactic acid) (PLA) biodegradable materials are viewed as promising as sustainable alternatives to petroleum-based commodity polymers. A new highly efficient flame retardant, poly(phenylphosphoryl phenylenediamine) (PPDA), was synthesized by the condensation of phenylphosphoryl dichloride with p-phenylenediamine and its structure was confirmed by H-1 nulear magnetic resonance and Fourier-transform infrared spectroscopy. When 3 wt% PPDA was incorporated into PLA, the limited oxygen index increased from 20.0% of neat PLA to 25.5% and its UL-94 vertical burning testing achieved V-0 rating. Moreover, the total heat release and peak heat release rate values of PLA/3 wt% PPDA material were decreased from 109.1 MJ/m(2) and 643.7 kW/m(2) of PLA to 98.3 MJ/m(2) and 570.0 kW/m(2), respectively, and the fire performance index increased from 0.081 of PLA to 0.132 m(2) s/kW. The high fire safety of PPDA in PLA is mainly attributed to the combined effects of the phosphorous-containing radical inhibition and inert gases and the barrier action of the formed char layer. The addition of less than 3 wt% PPDA has little influence on the tensile and impact properties of PLA. The flame retardant PLA blends have great application potential in electrical casing, automobile interiors and three-dimensional printing materials.
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