基于非均相反应小尺度实验的固态有机过氧化物自加速分解温度推算

引言 有要过氧化物的分子结构中含有双氧键,具有不稳定、易分解的特性,在较低的温度下就能发生热分解,放出大量的热,加速系统升温分解,从而发生剧烈反应,甚至导致热爆炸.

SADT calculation of solid organic peroxides based on small sample mass of heterogeneous reaction

Three solid organic peroxides, benzoyl peroxide (BPO), dicumyl peroxide (DCP) and cyclohexanone peroxide (CCP) were tested by using simultaneous TG-DSC analyzer (SDT Q600) with small sample mass, and the thermal data obtained from different scanning rate were analyzed by the Popescu multiple scanning rate method for the first time.Then, the values of self-accelerating decomposition temperature (SADT) of 25 kg standard package were computed according to the thermal explosion theory.The results showed that the values of activation energy and pre-exponential factor of these three solid organic peroxides by using the Popescu multiple scanning rate method were more precise and more credible than that by using the single scanning rate method.Based on correct calculation of these kinetic parameters, SADT can be accurately safely, easily, quickly evaluated with thermodynamic parameters based on thermal explosion theory.