摘要
Abstract
In order to investigate the thermal stability of BIBP[bis(tert-butyldioxy isopropyl)benzene],simultaneous thermal analyzer and adiabatic accelerated calorimeter were used to test and analyze.The parameters obtained were decomposition temperature,decomposition pressure,adiabatic temperature rise,temperature rise rate,pressure rise rate and heat of decomposition.Finally,activation energies under the two conditions of nitrogen and air atmosphere were calculated by combining the equal conversion method and the rate constant method,and the possibility of an accident occurring with BIBP was evaluated.The results show that the decomposition of BIBP has only one reaction,which is divided into two processes:slow decomposition and self-accelerating decomposition.In nitrogen atmosphere,the decomposition of BIBP starts at81.25-138.26℃with different heating rates,and the heat of decomposition ranges from 328.82 to 380.17 kJ/mol.In air atmosphere,the maximum decomposition of BIBP starts at101.2℃,the maximum pressure can reach up to23.94 MPa,and the corrected adiabatic temperature rise is 428.1℃.In the self-accelerating decomposition stage,the temperature rise rate and pressure rise rate reach 1 707.31℃/min and 352.77 MPa/min,respectively,and the heat of decomposition is 302.85 kJ/mol.The activation energies under the two conditions are calculated to be 112.17 kJ/mol and 154.65 kJ/mol.It shows that BIBP is thermally unstable,and is prone to cause combustion and explosion accidents in the event of thermal runaway reaction.Therefore,in the process of storage,transportation and use,the ambient temperature should be strictly controlled and certain safety measures should be set up.关键词
有机过氧化物/双叔丁基过氧异丙基苯/热分解/热稳定性Key words
organic peroxide/bis(tert-butyldioxy isopropyl)benzene/thermal decomposition/thermal stability分类
资源环境
