Si-P阻燃剂对环氧树脂热降解行为的影响

Effect of Si-P Containing Flame Retardant on the Thermal Degradation Behavior of Epoxy

采用无溶剂法合成了Si-P阻燃剂,并通过傅里叶变换红外(FTIR)和1 H-核磁(1 H-NMR)对其结构进行了表征。以Si-P阻燃剂和环氧树脂(EP)为主要原料,制备了阻燃型环氧树脂材料(FREP),研究了不同升温速率时,Si-P阻燃剂对EP热降解行为的影响。通过Kissinger方法对EP和FREP的热降解动力学进行了初步探讨。结果表明:相同升温速率下,FREP的初始分解温度和最大热失重速率对应温度均比EP的低;高温阶段,FREP的残留量高于EP;热降解过程中,FREP的表观活化能比EP的低56.3kJ/mol。

Si-P containing flame retardant was synthesized via non-solvent method. The structure of Si-P con- taining flame retardant was measured by Fourier transform infrared spectroscopy （FTIR） and 1H nuclear magnetic resonance spectrum （1 H-NMR）. Flame retardant epoxy （FREP） was prepared using Si-P containing flame retardant and epoxy （EP） as main raw materials. Effects of Si-P containing flame retardant on thermal degradation behaviors of EP at different heating rates were detected in details. The thermal degradation kinetics of EP and FREP were dis- cussed preliminarily through Kissinger method. The initial decomposition temperature and the temperature at maxi- mum decomposition rate of FREP were lower than that of EP. While the char residue amount of FREP was larger than EP＇s at high temperature. Meanwhile, the apparent activation energy of FREP was lower than that of EP by factors of 56. 3 kJ/mol during thermal decomposition.