Combustion properties and thermal degradation behavior of polylactide with an effective intumescent flame retardant
Combustion properties and thermal degradation behavior of polylactide with an effective intumescent flame retardant
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DOI：
10.1016/j.polymdegradstab.2008.12.015
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发表时间：
2009-03
影响因子：
5.9
通讯作者：
J. Zhan;Lei Song;Shi-bin Nie;Yuan Hu
中科院分区：
文献类型：
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作者：
J. Zhan;Lei Song;Shi-bin Nie;Yuan Hu
合成了一种膨胀型阻燃剂螺环季戊四醇双磷酸酯二磷酰三聚氰胺（SPH 4），并用傅里叶变换红外光谱（FTIR）、核磁共振氢谱（1H NMR）和31磷谱（31 P NMR）对其结构进行了表征。采用熔融共混法制备了一系列含聚苯乙烯的聚乳酸（PLA）阻燃复合材料。通过UL-94、极限氧指数（LOI）测试和微量燃烧量热（MCC）实验对PLA/SPR 40复合材料的燃烧性能进行了评价。结果表明，将酸源、炭源和气源相结合的阻燃剂显著提高了聚乳酸的阻燃性能和抗滴落性能。当阻燃剂的添加量为25wt%时，复合材料达到UL-94 V0，LOI值提高到38。热重分析（TGA）结果表明，聚乳酸的失重率降低，通过引入聚苯乙烯。此外，通过原位红外光谱分析了聚乳酸复合材料的热降解过程和可能的阻燃机理。
An intumescent flame retardant spirocyclic pentaerythritol bisphosphorate disphosphoryl melamine (SPDPM) has been synthesized and its structure was characterized by Fourier transformed infrared spectrometry (FTIR),1H and31P nuclear magnetic resonances (NMR). A series of polylactide (PLA)-based flame retardant composites containing SPDPM were prepared by melt blending method. The combustion properties of PLA/SPDPM composites were evaluated through UL-94, limiting oxygen index (LOI) tests and microscale combustion calorimetry (MCC) experiments. It is found that SPDPM integrating acid, char and gas sources significantly improved the flame retardancy and anti-dripping performance of PLA. When 25wt% flame retardant was added, the composites achieved UL-94 V0, and the LOI value was increased to 38. Thermogravimetric analysis (TGA) showed that the weight loss rate of PLA was decreased by introduction of SPDPM. In addition, the thermal degradation process and possible flame retardant mechanism of PLA composites with SPDPM were analyzed by in situ FTIR.