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김관응,김영수,신창섭 한국안전학회 1998 한국안전학회지 Vol.13 No.4
The evaluation of thermal and pressure hazard of chemicals on the manufacturing, transporting and storaging is important in the chemical industry for safety. In this study, the thermal decomposition characteristics of intermediate of Saccharin were investigated by using Accelerating Rate Calorimeter(ARC) and Differential Scanning Calorimeter(DSC). Experimental results showed that decomposition temperatures in p-TSA were about 280~$318^{\circ}C$ by DSC and $201^{\circ}C$ by ARC. In case of o-TSA were about $336^{\circ}C$~$360.8^{\circ}C$ by DSC and $299^{\circ}C$ by ARC. The decomposition temperature acquired by ARC was about $70^{\circ}C$ lower than that by DSC. The exothermic runaway reaction in case of p-TSA occured in 598 minute and o-TSA in 5 minute. For the safety in the chemical industry, we should consider the ARC data as well as DSC data in the handling and design of process.
김관응 한국산업안전학회 2002 한국안전학회지 Vol.17 No.2
This study was investigated the thermal decomposition characteristics of azo type sponge blowing agent azodicarbonamide(ADCA) using differential scanning calorimeter(DSC). The experimental results showed that the exothermic onset temperatures(T。) for ADCA were about 201~206℃ and evolution heats(Q) were about 144~150㎈/g. The exothermic onset temperatures(T。), exothermic maximum temperature(T_m) and exothermic final temperature(T_r) were decreased by decreasing particle size of ADCA and evolution heats(Q) were increased with it. T。 and Q for 6.1~7.2?? ADCA were increased by increasing heating rate at constant sample weight and activation energy was about 37.29㎉/㏖. A positive gas pressure was employed in the elucidation of the decomposition behavior of ADCA because it sublimes during linear heating at atmospheric pressure. T。 and Q of ADCA tended to increase with a pressure in air or nitrogen. In the case of azo dye, experimental results showed that T。 were about 280~420℃ and Q were about 2~3㎈/g.