Effects of thermal runaway hazard for organic peroxides conducted by acids and alkalines

摘要

Organic peroxides are widely used in many industrial fields as an initiator, hardeners, or cross-linking agents of radical polymerization process with unsaturated monomers. However, organic peroxides contain the bivalent -O-O-structure, which can be broken easily. The exothermic decomposition reaction involves the splitting of the peroxide bond with a huge heat release and gas products that may cause a fire or thermal explosion under an uncontrollable situation. The test results have proven helpful in establishing safe handling, storage, transportation, and disposal guidelines. This study used differential scanning calorimetry (DSC) and thermal activity monitor Ⅲ (TAM Ⅲ), to appraise the thermal hazards and incompatibilities of organic peroxides. Exothermic onset temperature, peak power, heat of decomposition of dynamic and isothermal scanning tests, time to maximum rate under isothermal conditions, etc., were studied to compare the exothermic behaviors in process systems. The thermokinetic data obtained via vent sizing package 2 (VSP2), such as initial exothermic temperature, adiabatic time to maximum heat release rate, adiabatic temperature rise, pressure rise rate, and self-heating rate, were applied for runaway hazard evaluation and for comparing the effects of thermal runaway hazard for specific organic peroxide conducted by acids and alkalines. These results are essentially important in process safety design for producing and using organic peroxides and their derivatives.