Characterization on thermal decompositions of tert-butyl hydroperoxide (TBHP) by confinement test

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• 作者：Yih-Shing Duh ; Hsiang-Yu Kuo ; Chen-Shan Kao
• 关键词：Tert ; butyl hydroperoxide ; Induced decomposition ; Thermal runaway ; Confinement test ; Solvent effect
• 刊名：Journal of Thermal Analysis and Calorimetry
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：127
• 期：1
• 页码：1047-1059
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Physical Chemistry; Analytical Chemistry; Polymer Sciences; Inorganic Chemistry; Measurement Science and Instrumentation;
• 出版者：Springer Netherlands
• ISSN：1588-2926
• 卷排序：127

文摘

Thermal decomposition of 20 mass% aqueous tert-butyl hydroperoxide (TBHP) is performed by confined apparatus as a model reaction. Inductive effects are verified by of hydroxyl and tert-butoxy radicals produced by the thermolysis of H₂O₂ and di-tert-butyl peroxide (DTBP), respectively. Solvent effects are performed by 20 mass% TBHP in acetone, n-butyl alcohol, decane, nonane, Nujol, toluene and H₂O. Thermodynamic and kinetic features, such as exothermic onset temperature, adiabatic temperature rise, maximum self-heat rate, maximum pressure and maximum temperature, are thus measured and utilized to characterize these mentioned influences. Hydroxyl radical is firstly discovered to possess the highest inductive effect on decomposition of TBHP. Exothermic onset temperature of 20 mass% aqueous TBHP is lowered from 146.0 ± 1.0 to 138.0 ± 2.0, 133.0 ± 0.0, 97 ± 8.8 and 89 °C by adding 10 mass% DTBP, 20 mass% DTBP, 10 mass% H₂O₂ and 20 mass% H₂O₂ relative to the mass of TBHP, respectively. The ranking of solvent effects on the thermal stability of solvated TBHP identified by exothermic onset temperature is arranged from high to low in the following: TBHP in toluene (178.5 ± 1.5 °C) > TBHP in decane (151.0 ± 2.0 °C) > TBHP in H₂O (146.0 ± 1.0 °C) > TBHP in nonane (143.5 ± 2.5 °C) > TBHP in Nujol (138.5 ± 0.5 °C) > TBHP in acetone (128.0 ± 2.0 °C) > TBHP in n-BuOH (122.5 ± 3.5 °C).