Flammability and Thermal Properties of a Novel Intumescent Flame Retardant Polypropylene
Flammability and Thermal Properties of a Novel Intumescent Flame Retardant Polypropylene
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DOI：
10.1177/0734904109100182
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发表时间：
2009-06
影响因子：
1.9
通讯作者：
Qingliang He;Hongdian Lu;Lei Song;Yuan Hu;Lijuan Chen
中科院分区：
文献类型：
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作者：
Qingliang He;Hongdian Lu;Lei Song;Yuan Hu;Lijuan Chen
一种新型膨胀型阻燃剂体系（IFR）将三（1-氧代-2,6,7-三氧杂-1-磷杂双环[2.2.2]辛烷-甲基）磷酸酯（TPMP）与焦磷酸三聚氰胺（MPOP）相结合，并研究了其在聚丙烯（PP）中的应用。通过热重分析（TGA）、UL-94测试和锥形量热法研究了其热稳定性、可燃性和耐水性。 TGA显示纯PP在约4008℃下降解，而样品PP-6在氮气气氛下在约270℃下降解。当 IFR 总负载量为 30wt% 时，样品 PP-6 通过了 UL-94 V-0 测试。水处理后仍可通过UL-94 V-0测试。 TPMP和MPOP的引入大大降低了阻燃（FR）PP复合材料的峰值放热速率（PHRR）值。通过扫描电子显微镜（SEM）研究了锥形量热法后获得的炭残留物的形态。样品PP-6的炭渣具有更好的结构，可以防止底层材料进一步分解。 X 射线光电子能谱 (XPS) 用于进一步探索 FR PP 复合材料的炭残留物。结果表明，样品PP-6的残炭效果最好，增强了残炭层的抗氧化能力。
A novel intumescent flame retardant system (IFRs) combines Tri (1-oxo-2,6,7-trioxa-1-phosphabicyclo [2. 2. 2] octane-methyl) phosphate (TPMP) with melamine pyrophosphate (MPOP) and its application in polypropylene (PP) has been investigated. The thermal stability, flammability, and water resistance were studied by thermogravimetric analysis (TGA), UL-94 test, and cone calorimetry. TGA shows that pure PP degrades at about 4008C, while sample PP-6 degrades at about 270°C under nitrogen atmosphere. With 30wt% total loading of the IFRs, sample PP-6 passes the UL-94 V-0 test. It can still pass the UL-94 V-0 test after the water treatment. The introduction of TPMP and MPOP strongly decreases the peak heat release rate (PHRR) value of the flame retardant (FR) PP composite. The morphologies of the char residues obtained after cone calorimetry were investigated by means of scanning electron microscopy (SEM). The char residue of sample PP-6 has better structure, which prevents the underlying materials from further decomposing. X-ray photoelectron spectroscopy (XPS) was used to further explore the char residues of the FR PP composites. The results show that sample PP-6 has the best char residue, which enhances the oxidation resistance of the char layer.