过氧化二异丙苯的热动力学研究  

Thermokinetic Studies of Dicumyl Peroxide

作　　者：陈发明[1,2] 吴剑[1,3] 丁阿平[1,2] 蒋军成[1,2] 

机构地区：[1]南京工业大学城市建设与安全工程学院,江苏南京210009 [2]江苏省城市与工业安全重点实验室,江苏南京210009 [3]南京市公安消防局,江苏南京210008

出　　处：《中国矿业大学学报》2009年第6期846-850,共5页Journal of China University of Mining & Technology

基　　金：国家"十一五"科技支撑计划(2007BAK22B04);南京工业大学青年教师学术基金

摘　　要：采用同步热分析仪测定在不同升温速率下过氧二异丙苯（DCP）的热流和热失重数据，通过相关模型确定DCP的热动力学参数．热流曲线表明DCP先熔融再分解，熔点为39．5℃，吸热焓为110J／g，放热峰温为165℃，分解热焓500J／g；随着升温速率的增加，热分解温度参数出现热延滞，放热峰断面扩大；采用Borchardt-Daniels方法确定DCP的活化能为140M／mol，反应级数为1．热重曲线表明DCP为一阶段热失重，失重峰峰温为170℃，失重率近90％；随着升温速率的增加，热失重温度参数出现延滞，但失重率降低；采用非模型动力学方法确定DCP在转化率为0．3～O．9之间的表观活化能接近，其均值为102．8kJ／m01．A synchronized thermal analyzer was used to measure heat-flow and weight-loss of dicumyl peroxide （DCP） at various heating rates. Numerical models of DCP thermo-kinetic parameters were developed. The data show that DCP first fuses and then decomposes. The DCP melting point is 39.5 ;C with an enthalpy for the phase transition of 110 J/g. The maximum temperature of decomposition is 165℃ with an enthalpy of 500 J/g. As the heating rate in- creased the temperature for the onset of decomposition shifted to higher temperatures. The thermal profile of the decomposition also extends to higher temperatures. The kinetic parameters for DCP decomposition were determined by the Borchardt-Daniels method. The reaction was first order and had an activation energy of 140 kJ/mol. The gravimetric curves show that the thermally induced weight loss occurs in one phase. The temperature of maximum weight loss is 170 ℃ and the total loss is about 90 %. As the heating rate is increased the loss curve shifts to higher temperatures but the total weight loss becomes smaller. A model free kinetic method was used to calculate kinetic parameters from the weight loss curves. At a conversion of 0.3 to 0.9 the apparent activation energy is approximately constant with a mean value of 102.8 kJ/mol.

关 键 词：过氧化二异丙苯 同步热分析仪 热动力学参数 

分 类 号：TQ013[化学工程] X937[环境科学与工程—安全科学]