高温电池阻燃材料热降解问题的数学分析

采用热重法对高温下普通ABS电池槽材料和VRLA蓄电池槽用耐热阻燃ABS材料在热降解过程中的差异进行比较分析,通过Flynn-Wall-Ozawa数学方法计算得到其反应活化能。结果表明,与普通ABS电池槽材料相比,耐热阻燃ABS初始热降解温度有所下降,热降解的速度下降,同时其炭化残重增加。耐热阻燃ABS的活化能(Ea)随失重率(α)的变化而呈不规则变化,当α=0.2时,耐热阻燃ABS的Ea仅为158.6 kJ/mol,低于纯ABS约46 kJ/mol,当α0.3时,耐热阻燃ABS的Ea约为245.7 kJ/mol,高于纯ABS约54 kJ/mol。

Mathematical analysis of thermal degradation of flame retardant materials for high temperature batteries

The thermogravimetric method was taken in the thermal degradation process of comparative analysis of the differences of high temperature common ABS battery groove and VRLA accumulator tank heat-resistant flame-retardant ABS material.And the reaction activation energy was obtained by Flynn wall Ozawa mathematical method of calculation.The results show that compared with the conventional ABS cell,the initial thermal degradation temperature of the heat resistance and flame retardant ABS is decreased,and the thermal degradation rate is decreased.At the same time,the carbonized residual weight was increased.Heat resistant and flame retardant ABS activation energy (Ea) was in irregular change with the change of weight loss rate (α).When α=0.2,Ea for the heat-resistant flame-retardant ABS was only158.6 kJ/mol,lower than the pure ABS about 46 kJ / mol,when α＞ 0.3,heat-resistant flame-retardant ABS Ea was about 245.7 kJ / mol,higher than the pure ABS about 54 kJ / mol.