| 聚乙烯/石墨层间化合物热降解过程的TG-FTIR研究 |
| TG-FTIR Study on Thermal Degradation of Polyethylene/Graphite Intercalation Compounds |
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| 摘要: 将含磷化合物插层石墨层间化合物(GIC)用于聚乙烯(PE)的阻燃，采用氧指数(LOI)方法评价了PE/GIC的阻燃性能，并采用热分析-红外光谱联用技术(TG-FTIR)研究了PE/GIC的热降解过程，探讨了GIC的阻燃机理。研究表明，不同含磷化合物插层GIC阻燃聚乙烯的氧指数有显著差别，其中以多聚磷酸铵-GIC的阻燃效果较好，氧指数较高。TG-FTIR研究结果表明，GIC并未显著影响PE的热降解方式，但由于GIC体积膨胀所发生的氧化还原反应导致部分PE热降解提前并发生热氧化降解，促进了后期成炭的石墨化过程。 |
| 关键词: 石墨层间化合物 磷酸铵 多聚磷酸铵 TG-FTIR 热降解 |
| 基金项目: |
| Abstract: Flame retardant properties of polyethylene(PE)/graphite intercalation compounds(GIC) intercalated with phosphorous compounds were evaluated by limiting oxygen index(LOI). Thermal degradation behaviors of PE/GIC were investigated by means of thermogravimetric analysis(TG) coupled with Fourier transform infrared spectroscopy(FTIR). As a result of LOI, appreciable distinction could be revealed between flame retardant properties of PE/GIG, among which PE/GIC intercalated by ammonium polyphosphate possessed the maximal LOI value. The results of TG-FTIR show that there are partially thermal degradation of PE at low temperature and thermal oxidation degradation. These phenomena could be reasonably interpreted by redox process of GICs during their volume expansion which contributes to thermal oxidation process of PE and promotes charring and graphitizing process. |
| Keywords: graphite intercalation compounds ammonium phosphate ammonium polyphosphate TG-FTIR thermal degradation |
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| 韩志东,潘海涛,董丽敏,张显友.聚乙烯/石墨层间化合物热降解过程的TG-FTIR研究[J].无机化学学报,2008,24(5):755-759. |
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