摘要
为了解决实际工业生产中偶氮二异丁腈(AIBN)引发的苯乙烯本体聚合过程中反应放热速率较快,极易出现热失控,引发反应器超压爆炸的风险,采用差示扫描量热仪(DSC)和绝热加速量热仪(ARC)获取热动力学参数,表征由AIBN引发苯乙烯聚合的热危险特性。DSC实验结果表明:AIBN会促进聚合反应的发生,添加引发剂后,聚合反应的外推起始温度(T_(onset))和放热峰温度(T_(p))逐渐降低。ARC实验获取了表观活化能、绝热温升等热动力学参数。结果表明:在不同的加热速率下,聚合反应释放的热量基本不变,随着引发剂用量的增加,聚合反应释放的热量也随之增加。该研究对降低苯乙烯聚合工艺的热危险性和提升精细化工行业的本质安全化水平有重要的指导意义。
In order to solve the problem of the rapid exothermic rate of styrene bulk polymerization caused by azodiisobutyronitrile(AIBN)in actual industrial production,it is easy to have thermal runaway and the risk of overpressure explosion of the reactor,differential scanning calorimetry(DSC)and adiabatic accelerated calorimetry(ARC)were used to obtain thermodynamic parameters to characterize the thermal hazard characteristics of styrene polymerization initiated by AIBN.The results of DSC experiments showed that AIBN could promote the occurrence of polymerization reaction,and the extrapolated starting temperature(T_(onset))and exothermic peak temperature(T_(p))of the polymerization reaction gradually decreased after the addition of initiator.The results showed that the heat released by the polymerization reaction was basically unchanged under different heating rates,and the heat released by the polymerization reaction increased with the increase of the initiator dosage.This study has important guiding significance for reducing the thermal hazard of styrene polymerization process and improving the intrinsic safety level of fine chemical industry.
作者
贾学坤
高博
王文和
JIA Xuekun;GAO Bo;WANG Wenhe(School of Safety Science and Engineering,Chongqing University of Science and Technology,Chongqing 401331,China;Gerres Kingland An(Chongqing)Technology Co..,Ltd.,Chongqing 401329,China)
出处
《当代化工》
2025年第5期1080-1085,共6页
Contemporary Chemical Industry
基金
重庆科技大学研究生科技创新计划项目(项目编号:YKJCX2220705)。
关键词
苯乙烯
聚合反应
热危险性
绝热温升
反应动力学
Styrene
Polymerization
Thermal hazard
Adiabatic temperature rise
Reaction kinetics
