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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/28721

    標題: Thermal decompositions of dialkyl peroxides studied by DSC
    作者: Duh, Yih-Shing
    Yo, Jin-Min
    Lee, Wen-Lian
    Kao, Chen-Shan
    Hsu, Jing-Ming
    貢獻者: 職業安全衛生系
    關鍵字: Dialkyl peroxide
    Onset temperature
    Thermal decomposition
    日期: 2014-10
    上傳時間: 2015-05-06 21:26:25 (UTC+8)
    出版者: Springer
    摘要: Studies on the thermal decompositions of diamyl peroxide (DAPO), dicumyl peroxide (DCPO), and tert-butyl cumyl peroxide (TBCP) were conducted by DSC. Heat of decomposition, exothermic onset point, and chemical kinetics were determined and compared to those data of di-tert-butyl peroxide (DTBP), a model compound for studying thermokinetics of organic peroxide and standardization of a calorimeter. Similarities and differences of decomposition mechanisms between these organic peroxides were proposed and verified. Kinetics on decomposition of uni-molecular reaction via these similar alkoxyl radials accompanying beta C-C bond scission were discussed and compared to the results from ab initio calculations. The ranking of thermal stability on dialkyl peroxides is determined to be in the following sequence: DCPO < TBCP < DAPO < DTBP. This rate-determining step in thermal decomposition of dialkyl peroxides possessed an average eigenvalue of log A at about 13.1 +/- A 1.2. Activation energy on the thermal decomposition of these peroxides was calculated to be 139.5 +/- A 14.4 kJ mol(-1).
    關聯: Journal of thermal Analysis and Calorimetry, v.118 n.1, pp.339-347
    Appears in Collections:[職業安全衛生系(含防災所)] 期刊論文

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