无、含水过氧化苯甲酰热分解及撞击感度研究  

Thermal decomposition characteristics and impact sensitivity of anhydrous and wet benzoyl peroxide

作　　者：李世然 吴文倩 陈利平[1] 赵小乔 陈网桦[1] LI Shiran;WU Wenqian;CHEN Liping;ZHAO Xiaoqiao;CHEN Wanghua(School of Chemical Engineering,Nanjing University of Science&Technology,Nanjing Jiangsu 210094,China)

机构地区：[1]南京理工大学化工学院,江苏南京210094

出　　处：《中国安全科学学报》2020年第7期93-100,共8页China Safety Science Journal

基　　金：国家重点研发计划项目(2017YFC0804701-4)。

摘　　要：为研究无、含水过氧化苯甲酰(BPO)的热分解特性、撞击感度及两者间的关系,首先分别对无水和含水24.9%的BPO进行差式量热扫描(DSC)测试和不同环境温度下的撞击感度测试;然后根据无水和含水BPO的一系列动态和等温DSC测试结果,分别对2种材料在固相分解和固相熔融为液相的分解过程建立"自催化+n级"模型和"自催化+自催化+n级"模型,并预测得到两者的热点温度为244.7、277.9℃;最后根据撞击感度测试结果,拟合得到特性落高H50与环境温度θ0的关系。结果表明:在40、50℃条件下,含水BPO撞击感度明显低于无水BPO,但前者在40~70℃的环境中对温度更加敏感。因此,在含水BPO的运输、贮存等工业过程中需注意控制温度以降低因撞击而产生爆炸事故的风险。In order to study thermal decomposition characteristics,impact sensitivity of anhydrous and wet BPO,and discuss their relationship.Firstly,DSC tests and impact sensitivity tests at different ambient temperatures were carried.Then,based on the results of a series of dynamic and isothermal DSC tests,"autocatalytic+n order"model and"autocatalytic+autocatalytic+n order"model were established for decomposition under solid phase and melting process,and the hot spot temperatures of the above two conditions were predicted to be 244.7 and 277.9℃,respectively.Finally,the relationship between the characteristic drop height H50 and the ambient temperatureθ0 was obtained according to the results of impact sensitivity tests.The results show that impact sensitivity of wet BPO is significantly lower than anhydrous BPO at 40 and 50℃,but the wet BPO is more sensitive to temperature at 40-70℃.Therefore,it is necessary to control temperature during transportation of wet BPO to reduce risk of explosion accidents caused by impaction.

关 键 词：过氧化苯甲酰(BPO) 差式量热扫描(DSC) 环境温度 热分解 撞击感度 

分 类 号：X937[环境科学与工程—安全科学] X932