Effect of a phosphorus-containing flame retardant on the thermal properties and ease of ignition of poly(lactic acid)
Effect of a phosphorus-containing flame retardant on the thermal properties and ease of ignition of poly(lactic acid)
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含磷阻燃剂对聚乳酸热性能和易燃性的影响
DOI：
10.1016/j.polymdegradstab.2011.05.018
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发表时间：
2011-09-01
影响因子：
5.9
通讯作者：
Wang, Yu-Zhong
中科院分区：
文献类型：
--
作者：
Wei, Lian-Lian;Wang, De-Yi;Wang, Yu-Zhong
以聚苯基膦酸芳酯聚（9-氧杂-10-（2，5-二羟基苯基）磷杂菲-10-氧化物）苯基膦酸酯（WLA-3）为原料，采用直接熔融共混法制备阻燃聚乳酸（PLA）。通过热重分析（TGA）、差示扫描量热法（DSC）、扫描电镜（SEM）、垂直燃烧试验（UL-94）、极限氧指数（LOI）、锥形量热仪（CCT）和拉伸试验等研究了阻燃聚乳酸体系的热行为、燃烧行为和力学性能。通过傅里叶变换红外光谱（FTIR）、凝胶渗透色谱（GPC）和磷含量分析，研究了阻燃机理。含有7 phr（W-7 P）和10 phr（M-10 P）WLA-3的PLA的UL-94等级从纯PLA的无等级提高到V-0。然而，锥形量热法显示阻燃PLA（W-7 P）的热释放速率（HRR）、热释放速率峰值（PHRR）和总热释放（THR）与纯PLA相比仅略有降低。热重分析结果表明，不同WLA-3含量的聚乳酸的热分解行为比纯聚乳酸复杂。DSC和拉伸性能测试结果表明，WLA-3的加入对PIA的结晶行为和拉伸性能影响不大。(C)2011爱思唯尔有限公司保留所有权利。
An aryl polyphenylphosphonate, poly(9-oxa-10-(2,5-dihydro-xyphenyl) phospha-phenanthrene-10-oxide) phenylphosphonate (WLA-3), was used to prepare a flame-retardant poly(lactic acid) (PLA) by direct melt compounding. The thermal behaviour, burning behaviour and mechanical properties of the flame-retardant PLA systems have been investigated by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), vertical burning test (UL-94), limiting oxygen index (LOI), cone calorimeter test (CCT) and tensile test. The flame retardance mechanism has been studied via Fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), and P content analysis. The UL-94 ratings of PLA's containing 7phr (W-7P) and 10phr (M-10P) of WLA-3 were enhanced to V-0 from no rating for neat PLA. However, the cone calorimetry of flame-retardant PLA (W-7P) only showed a little decrease in heat release rate (HRR), peak of heat release rate (PHRR) and total heat release (THR) compared to neat PLA. TGA results showed that the PLA containing different amounts of WLA-3 presented more complicated thermal decomposition behaviours than neat PLA. Additionally, the results from DSC and tensile tests showed that the addition of WLA-3 into PIA had slight impact on the crystallization behaviours and tensile properties. (C) 2011 Elsevier Ltd. All rights reserved.