阻燃硅橡胶电缆材料热解动力学研究

摘要

采用Kissinger法、Friedman法和Flynn- Wall and Ozawa法,研究以氢氧化镁/红磷/有机蒙脱土阻燃的甲基乙烯基硅橡胶电缆材料的热氧化降解反应动力学,得到热解活化能.结果表明:氢氧化镁/红磷/有机蒙脱土阻燃体系提高了硅橡胶的热氧化降解反应的活化能,且热解活化能受转化率的影响较大.根据热解动力学的结果,分析知样品材料的火灾危险性较小.%This review describes thermo-oxidative decomposition kinetics of silicone rubber (MVMQ) flame retardant by Magnesium hydroxide (MH)/red phosphorus (RP)/organic montmo-rillonite (OMMT) using thermo-gravimetric analysis (TG). Activation energies were determined using the Kissinger method, Friedman method and Flynn-Wall-Ozawa method. The results show that MVMQ/MH/RP/OMMT has higher thermal stability and reaction energy barrier, and material has low fire hazard. The activation energy was influenced by conversion rate largely.