Thermal decomposition of AIBN Part C: SADT calculation of AIBN based on DSC experiments

The kinetic model for AIBN decomposition is created based on DSC experimental data. It contains both exothermal (decomposition) and endothermal (melting) kinetic processes as well as decomposition from both the solid and the liquid phases. For the temperatures below the melting range, only solid decomposition occurs. For the long time in the melting and submelting range from 80 to 100 °C, decomposition from both the solid and liquid phases run parallel. Verification of the kinetic model is based on the H.4 UN-Tests. SADT temperatures have been found for the 5, 20 and 50 kg packages. It is pointed out that for these SADT temperatures, self-heating due to decomposition occurs for induction times of longer than 7 days. Therefore, the examination for storage time exceeding induction period of SADT is necessary. Maximal ambient temperatures have been found for the same packages where sample temperature does not exceed ambient one by 6 K in 60 days.