研究了聚磷酸铵(APP)和季戊四醇(PER)阻燃环氧树脂的阻燃性能和热分解特性.结果表明,阻燃环氧树脂的氧指数(LOI)随APP含量的增加而增加;当APP添加量达到20%时,阻燃环氧树脂的垂直燃烧性能达到V-0级.在APP阻燃环氧树脂中引入成炭剂PER使得体系的LOI值有所降低,但适量PER的引入使得阻燃体系的最大热释放速率降低.热失重(TG)实验结果表明,与未阻燃的环氧树脂相比,阻燃环氧树脂的初始分解温度有所降低,但在高温下阻燃环氧树脂的热稳定性较好.此外,还采用了激光拉曼光谱对阻燃环氧树脂燃烧后的炭层进行了分析.
The flammability of epoxy resin (EP) composites containing ammonium polyphosphate (APP) and pentaerythritol (PER) was studied by the limiting oxygen index (LOI), UL-94 and cone calorimeter. It is found that the LOI values of the EP composites increase with increasing APP content. For the composite containing 20% APP, the value is as high as 35% and the composite reaches the V-0 rating. The LOI values of the EP/APP/PER composites are lower than those of the EP/APP composites. However, the peak rate of heat release of the EP/APP/ PER composites at the ratio APP/PER = 3:1 is lower than that of the EP/APP composite without PER. The thermogravimetric analysis results indicate that the initial decomposition temperatures of the EP/APP or EP/APP/ PER composites decrease compared with the epoxy resin. Moreover, the char left from the epoxy resin and flame retarded EP composites was investigated by laser Raman spectroscopy.
参考文献
| [1] | Shui-Yu Lu;Ian Hamerton .Recent developments in the chemistry of halogen-free flame retardant polymers[J].Progress in Polymer Science,2002(8):1661-1712. |
| [2] | Sponton M;Mercado LA;Ronda JC;Galia M;Cadiz V .Preparation, thermal properties and flame retardancy of phosphorus- and silicon-containing epoxy resins[J].Polymer Degradation and Stability,2008(11):2025-2031. |
| [3] | Jimenez M;Duquesne S;Bourbigot S .Characterization of the performance of an intumescent fire protective coating[J].Surface & Coatings Technology,2006(3/4):979-987. |
| [4] | Li X.;Ou YX.;Shi YS. .Combustion behavior and thermal degradation properties of epoxy resins with a curing agent containing a caged bicyclic phosphate[J].Polymer Degradation and Stability,2002(3):383-390. |
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