Thermal properties and flame retardancy of polycarbonate/hydroxyapatite nanocomposite
Thermal properties and flame retardancy of polycarbonate/hydroxyapatite nanocomposite
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DOI：
10.1002/app.28053
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发表时间：
2008-07-05
影响因子：
3
通讯作者：
Yang, Ming-Bo
中科院分区：
文献类型：
--
作者：
Dong, Quan-Xiao;Chen, Qian-Jin;Yang, Ming-Bo
采用热重分析（TGA）研究了聚碳酸酯（PC）和聚碳酸酯/羟基磷灰石（PC/HAP）复合材料的热降解过程，并用Kissinger法计算了分解活化能。结果表明，第一步分解活化能（E-a1）高于纯PC，而第二步分解活化能（E-a2）略有下降。0.5 wt % HAP的PC/HAP复合材料的极限氧指数（LOT）达到34。利用扫描电镜（SEM）、x射线光电子能谱（XPS）和红外光谱（FTIR）对PC和PC/HAP复合材料燃烧后的炭渣进行了分析，发现炭渣的形貌、成分和官能团相似。综上所述，在PC基体中添加较低含量的HAP可以显著改善复合材料的热性能和阻燃性。(c) 2008 Wiley期刊有限公司
The thermal degradation of polycarbonate (PC) and polycarbonate/hydroxyapatite (PC/HAP) composite was investigated by the thermogravimetric analysis (TGA) and the decomposition activation energy was calculated by Kissinger method. It was found that the first step decomposition activation energy (E-a1) was higher than that of pure PC while the second step decomposition (E-a2) decreased a little. The limiting oxygen index (LOT) of PC/HAP composite with 0.5 wt % HAP reached 34. The carbon char of PC and PC/HAP composite after cornbustion was analyzed by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and flourier transform infrared spectroscopy (FTIR) and similar morphology, components, and the same functional groups were found in the char residues. Based on these results, it can be concluded that a low content of HAP in PC matrix can significantly improve the thermal properties and flame retardancy of the composite. (c) 2008 Wiley Periodicals, Inc.