材料期刊网

以1,3,5-三(2-羟乙基)异氰尿酸酯(THEIC)和马来酸酐(MAH)为原料,合成一种马来酸异氰尿酸酯成炭剂(MT),采用傅里叶红外光谱(FTIR)、核磁共振氢谱(1 H NMR)和元素分析等对其进行表征。将 MT 与聚磷酸铵(APP)复配成膨胀型阻燃剂(IFR)应用于PP 阻燃,当 IFR添加量为30%(质量分数),m(APP)/m(MT)=2∶1时,PP复合物的极限氧指数(LOI)达35.2%,垂直燃烧测试达 V-0级。热重分析结果表明,IFR 的加入可以提高 PP复合物的热稳定性。锥形量热测试结果表明 IFR的加入可使PP复合物的 pHRR降低70.6%,THR下降22.0%。

A charring agent named MT was successfully synthesized by using tris(2-hydroxyethyl)isocyanurate (THEIC)and maleic anhydride (MAH)as raw materials.The chemical structure of MT was characterized by Fourier transform infrared (FTIR)spectra,1 H-NMR spectra and elemental analysis.MT and ammonium polyphosphate (APP)were added to polypropylene as an intumescent flame retardant (IFR)system to enhance the flame retardancy of PP.The UL-94 burning test and limiting oxygen index (LOI)test results showed that 30% loading of IFR and APP/MT=2∶1 could increase the LOI value to 35.2% and pass V-0 rating.The TGA curves suggested that the ad-dition of IFRs could increase the char residue of the PP composites and showed high thermal stability.The cone color-imeter test results indicated that adding IFRs to PP could both reduce the values of pHRR and THR,which were 70.6% and 22.0%,respectively.