偶氮二异丁腈热安全性分析与评估

Analysis and Assessment of the Thermal Safety of Azobisisobutyronitrile

为获得偶氮二异丁腈(AIBN)在各种热应力条件下的危险参数,通过简化的压力容器试验测试AIBN的热分解激烈性等级,采用差示扫描量热仪(DSC)和绝热量热仪(ARC)对AIBN的热分解过程进行研究,用动力学与热稳定性分析软件AKTS计算动力学参数在整个反应进程中的变化情况,并根据ARC测试结果推算自加速分解温度(TSADT)。结果表明:AIBN的热分解激烈性为Ⅱ类,易呈现爆炸特性;其初始分解温度和TSADT很低,分别约为78℃和61℃,且分解放热过程和熔融吸热过程同时发生。因此,在AIBN的生产、使用、贮存和运输等过程中应加强温度监控,并根据实际情况采取降温措施。

In order to get hazardous parameters of AIBN under various thermal stress conditions, a simplified Pressure Vessel Test was carried out to test the decomposition intensity of AIBN. Both DSC and ARC were used to study the thermal decomposition process of it. Kinetic parameters in the whole reaction process were calculated by using the software, named as Advanced Kinetics and Technology Solutions AKTS.TSADT was acquired by extrapolation method based on ARC data. Results show that the decomposition intensity of AIBN is II and it is easy to show explosive property, that the onset temperature （about 78℃ ） and TSADT（about 60℃） are very low, and that the exothermic decomposition reaction takes place parallel with the endothermic melting process. So, in the actual process of production, usage, storage and transportation of AIBN, it is essential to strengthen temperature monitoring and take effective measures to cool it according to the actual situations.