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Study on the thermal degradation behavior and flame-retardant property of polylactide/PEDPP blends

机译:聚丙交酯/ PEDPP共混物的热降解行为和阻燃性能研究

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摘要

A phosphorus-containing polyester, poly (ethylene diglycol phenylphosphinate) (PEDPP) was synthesized from phenylphosphonic dichloride and ethylene diglycol. The structure of PEDPP has been determined by Fourier transform infrared (FTIR) spectroscopy, ~1H nuclear magnetic resonance and matrix assisted laser desorption ionizationtime of flight-mass spectrometer. A series of polylactide (PLA) blends with various content of PEDPP as flame retardant was prepared by direct melt compounding; the PLA/PEDPP blend is partially miscible. PEDPP is an effective flame retardant for PLA. The limiting oxygen index values increased from 19.7% for pure PLA to 29.0% for the blend containing 10 wt% PEDPP. Thermogravimetric analysis-FTIR analysis indicated that the PEDPP affected the pyrolytic decomposition process of PLA, which is established by the change of the pyrolytic decomposition rate and the gross mass of gaseous fuel formation. The pyrolytic decomposition activation energies of PLA and PLA/10% PEDPP were estimated via Flynn-Wall-Ozawa method.
机译:由二膦酸苯基膦酯和二甘醇合成了一种含磷的聚酯聚二乙二醇苯基次膦酸酯(PEDPP)。 PEDPP的结构已通过傅立叶变换红外(FTIR)光谱,〜1H核磁共振和飞行辅助质谱仪的基质辅助激光解吸电离时间确定。通过直接熔融混合制备了一系列具有不同含量的PEDPP阻燃剂的聚丙交酯(PLA)共混物。 PLA / PEDPP混合物可部分混溶。 PEDPP是PLA的有效阻燃剂。极限氧指数值从纯PLA的19.7%增加到包含10 wt%PEDPP的混合物的29.0%。热重分析-FTIR分析表明,PEDPP影响了PLA的热分解过程,这是由热分解速率和气态燃料形成总质量的变化所决定的。通过Flynn-Wall-Ozawa方法估算了PLA和PLA / 10%PEDPP的热解分解活化能。

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