新型n-p协同本质阻燃聚芳醚砜合成与表征-synthesis and characterization of novel n - p synergistic essential flame retardant polyarylether sulfone.docxVIP

新型 N-P 协同本质阻燃聚芳醚砜的合成与表征from 206℃ to 276℃. Under nitrogen atmosphere, the extension starting degradationtemperatureof the polymers were all above 420℃, the temperature for 50% weight loss ranged from 785℃ to 971℃, the Char yield at 1000℃ ranged from 42wt% to 56wt%.Especially,the char yield of polymer PES46 was over 30wt% higher than that of the non-nitrogen PES-P at 800℃ and still remained 4.4wt% at 1000 ℃ under air atmosphere.It might be contributed to the loss of nitrogen in the polymer chain and the synergistic effect of P and N. The gases released by heating nitrogen-containing monomer and phosphorus -containing compounds form a spumose protecilve foil on the surface of the polymer. It plays a part in insulating thermal and inhibiting smoke and decrease the degradation rate of the polymer. Meanwhile, the phosphorus existing in the system obviously promotes carbonization, and it displays good retardant effectiveness in both condensed phases and gas phase. Nitrogen and phosphorus have a good synergistic effect in the polymer, which impove thermal stability and char yield efficiently. So the obtained polymer can serve as flame retardant agent in high polymer material.Keywords：DHPZ; DOPO-PhOH; DOPO-BQ; Poly(ether sulfone); Thermally stable; Flame retardant; Synergistic effect符 号 说 明英文缩写Abbreviations英文名称English full name中文名称Chinese significationDMAcDimethylacetamide二甲基乙酰胺NMPN-methyl-2-pyrrolidoneN-甲基-2-吡咯烷酮THFTetrahydrofuran四氢呋喃CDCl3Chloroform氯仿DMSODimethyl sulfoxide二甲基亚砜DMFN, N-DimethylformamideN, N－二甲基 甲酰胺APPAmmonium polyphosphate聚磷酸铵 DMMPDimethyl methyl phosphonic acid ester甲基膦酸二甲酯 PVAPolyvinyl alcohol聚乙烯醇PPVPolyphenylene vinylene聚苯亚乙烯GPCGel permeation chromatography凝胶渗透色谱ηinhInherent viscosity特性黏度MnNumber average molecular weight数均分子量MwWeight average molecular weight重均分子量FT-IRFourier transform infrared SpectroscopyHPLCHigh-performance傅立叶变换 红外光谱仪liquid chromatography高效液相色谱DSCDifferential scanning calorimetry差示扫描分析TgGlass transition temperature玻璃化转变温度TGAThe