主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2021, Vol. 40 ›› Issue (8): 1232-1235.

• • 上一篇    下一篇

微量Fe3+对过氧化二异丙苯热分解动力学的影响

秦志益，付诗峻，刘惠平，刘章蕊   

  1. 上海应用技术大学 城市建设与安全工程学院，上海 201418
  • 出版日期:2021-08-15 发布日期:2021-03-15
  • 通讯作者: 刘惠平（1974-），男，湖南常德人，上海应用技术大学城市建设与安全工程学院副教授，博士。
  • 作者简介:秦志益（1996-），男，重庆人，上海应用技术大学城市建设与安全工程学院硕士研究生，主要从事化学物质及化工工艺安全研究，上海市奉贤区海泉路100号，201418。

Effect of trace Fe3+ on kinetics of thermal  decomposition of dicumyl peroxide

QIN Zhi-yi, FU Shi-jun, LIU Hui-ping,  LIU Zhang-rui   

  1. School of Urban Construction and Safety Engineering, Shanghai Institute of Technology, Shanghai 201418, China

  • Online:2021-08-15 Published:2021-03-15

摘要： 利用差示扫描量热仪（DSC）对含微量Fe3+ 的过氧化二异丙苯（DCP）在等温及动态升温条件下的热分解特性进行了测试，用动力学分析软件（Kinetics Neo）对测试结果进行分析，并与化学纯DCP的相应测试结果进行了对比。结果表明，两样品分解过程均遵循n级反应动力学规律；微量Fe3+的存在对DCP的起始分解温度（T0）和峰值温度（Tp）影响不大，但对平均比放热量（ΔHr）有较大影响，如含Fe3+DCP的（ΔHr）为745.4 J/g，而纯DCP的ΔHr为977.1 J/g。Friedman法和模型拟合法得到的动力学参数相似。基于模型拟合法求得的热分解动力学参数，对两样品绝热条件下最大反应速率达到时间（TMRad）对应的温度进行了预测。结果表明，与化学纯DCP相比，含Fe3+DCP不同TMRad对应的温度均明显下降。

关键词: 过氧化二异丙苯, 铁离子, 差示扫描量热仪, 热分解动力学

Abstract:


In order to study the effect of trace iron ions (Fe3+) on the thermal decomposition kinetics of Dicumyl Peroxide, the thermal decomposition characteristics of DCP containing trace Fe3+ under isothermal and dynamic heating conditions were measured by differential scanning calorimeter (DSC), and the results were analyzed by kinetic analysis software(Kinetics Neo), and compared with the corresponding results of pure DCP. The results of isothermal DSC showed that the decomposition process of the two samples followed the n-order kinetic law; the dynamic DSC test results showed that the presence of trace Fe3+ has little effect on initial decomposition temperature(T0) and peak temperature (Tp) of DCP, but has great influence on average specific heat release (ΔHr). For example, theΔHrof DCP containing Fe3+ was 745.4 J/g, but that of pure DCP was 977.1 J/g. Kinetic Neo software analysis results show that the kinetic parameters obtained by Friedman method and model fitting method are similar. Based on the kinetic parameters of thermal decomposition obtained by the model fitting method, the temperature corresponding to the maximum reaction rate reaching time (TMRad) of the two samples under adiabatic condition was predicted. The results showed that, compared with that of the chemical pure DCP, the temperature corresponding to different TMRad of DCP containing Fe3+ decreased obviously.

Key words:  , dicumyl peroxide, iron ion, differential scanning calorimeter, thermal decomposition kinetics