EP/MOC复合材料热分解动力学与阻燃性能研究

采用Kissinger法和Crane法对环氧树脂/氯氧镁(EP/MOC)阻燃复合材料在空气中不同升温速率下的热重(TG)和差热(DTA)曲线进行了热解动力学研究。测定了EP/MOC复合材料中EP起始分解和终止分解放热峰的特征温度。结果表明:EP/MOC复合材料中的EP活化能高于纯EP,说明MOC增强了EP的热稳定性,提高了热解温度;EP/MOC中的EP热分解反应级数和纯EP基本相同,说明同条件下的EP和MOC对热分解速率的影响是相同的;另外,该EP/MOC复合材料具有良好的阻燃性能。

Thermal Decomposition Kinetics and Flame Retardant Properties of EP/MOC Composites

Kissinger and Crane methods were used to calculate thermal decomposition kinetic parameters by investigating thermogravimetric(TG) and differential thermal analysis(DTA) curves of epoxy resin/magnesium oxychloride(EP/MOC) flame retardant composites at different heating rates.The characteristic temperatures of initial and terminational exothermic decomposition peak of EP in MOC/EP flame retardant composites were measured.The results show that the activation energy of EP in EP/MOC flame retardant composites is higher than that of pure EP,and MOC enhances thermal stability and increases pyrolysis temperature of EP in EP/MOC.The thermal decomposition reaction orders of EP in EP/MOC flame retardant composites and pure EP are basically the same,indicating that both effects of EP and MOC on thermal decomposition rates are the same at the same conditions.Moreover,the EP/MOC composites exhibits excellent flame retardant properties.