Abstract: In order to study the influence of water and weak acid on the thermal hazard of cumene hydroperoxide(CHP),the thermal decomposition of CHP and CHP mixtures with different contents of water and weak acid and different pH of weak acid in the air was studied by C600 calorimeter.The corresponding kinetic and thermodynamic parameters based on experimental data were obtained,and the Semenov model was used to calculate the self accelerating decomposition temperature (SADT).The results show that small amounts of water and weak acid reduce the initial exothermic temperature,peak exothermic temperature and activation energy.The pH of weak acid also affects thermal hazard of CHP.As the pH of weak acid decreases,it is easier for the CHP decomposition reaction to occur.Calculated SADT of CHP is 84℃.The comparison on the calculated SADT results indicates that small amounts of water and weak acid reduce the SADT of CHP,and at lower pH of weak acid,the SADT also decreases.

Key words: water, weak acid, CHP, thermal hazard, influence

摘要： 为研究水和弱酸对过氧化氢异丙苯(CHP)热危险性的影响,利用C600微量热仪研究了CHP及CHP与不同含量水、不同含量弱酸、不同pH值弱酸的混合物在空气中受热分解的反应和放热特性,根据实验数据得出了相应的动力学和热力学参数,利用Semenov热爆炸模型计算出了自加速分解温度(SADT)。结果表明:少量的水和弱酸都能够使CHP的起始放热温度、最大放热温度、活化能降低;弱酸的pH值对CHP的热危险性也有影响,pH值越低,CHP的热危险性越大;计算得到CHP的SADT为84℃,通过对CHP及CHP与不同含量水、弱酸和不同pH值弱酸混合物SADT进行比较,发现少量的水和弱酸均能降低CHP的SADT,弱酸的pH值对SADT也有影响,pH值越低,CHP与弱酸混合物的SADT越小。

关键词: 水, 弱酸, 过氧化氢异丙苯, 热危险性, 影响