| 2,4-二氯过氧化苯甲酰的热分解及等温动力学模型 |
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| 引用本文： | 吕家育,陈网桦,陈利平,路贵斌,高海素,田映韬. 2,4-二氯过氧化苯甲酰的热分解及等温动力学模型[J]. 化工学报, 2013, 64(11): 4054-4059. DOI: 10.3969/j.issn.0438-1157.2013.11.023 |
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| 作者姓名： | 吕家育 陈网桦 陈利平 路贵斌 高海素 田映韬 |
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| 作者单位： | 南京理工大学化工学院安全工程系, 江苏 南京 210094 |
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| 摘 要： | 引言2,4-二氯过氧化苯甲酰(双-2,4,DCBP)工业上常用作自由基引发剂、高温硅橡胶固化剂和无模硫化剂。因用该物质生产的硅橡胶制品无毒,可用于人工脏器、牙托、奶瓶等,也可用作高功率发电机绝缘用品,尤其适用于导弹、航天器中密封圈及耐热胶管带[1]。有机过氧化物中含有不稳定的"—O—O—"键,导致此类物质易受热分解,并引
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| 关 键 词： | 热分解 动力学 自催化 等温模型 机理函数 |
| 收稿时间： | 2013-04-03 |
| 修稿时间： | 2013-04-25 |
Thermal decomposition and isothermal kinetic model of bis-2, 4-dichlorobenzoyl peroxide |
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| L Jiayu;CHEN Wanghua;CHEN Liping;LU Guibin;GAO Haisu;TIAN Yingtao. Thermal decomposition and isothermal kinetic model of bis-2, 4-dichlorobenzoyl peroxide[J]. Journal of Chemical Industry and Engineering(China), 2013, 64(11): 4054-4059. DOI: 10.3969/j.issn.0438-1157.2013.11.023 |
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| Authors: | L Jiayu CHEN Wanghua CHEN Liping LU Guibin GAO Haisu TIAN Yingtao |
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| Affiliation: | Department of Safety Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China |
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| Abstract: | Bis 2,4-dichlorobenzoyl peroxide(DCBP)is usually used as an initiator,a hardener,and a vulcanizing agent in rubber industry.As a kind of organic peroxides,the peroxy group(-O-O-)may cause the thermal instability and explosion likelihood of DCBP.To analyze the potential hazards of its thermal decomposition,the differential scanning calorimetry(DSC)was used to test the thermal behavior of DCBP under dynamic and isothermal conditions.Kinetic parameters calculated by the Friedman iso-conversional method indicated the autocatalysis possibility of this decomposition.DSC curves obtained at five constant temperatures confirmed a strong autocatalytic reaction of DCBP.Exothermic onset temperature of DCBP was 98℃ and activation energy was between 232 kJ·mol-1 and 236 kJ·mol-1 under dynamic evaluation.When scanning at 92℃ in isothermal mode,the time to maximum rate was less than 30 min,so the best constant temperature for evaluation under this mode should be no higher than 92℃ to prevent loss of heat-flow signal.By simulating the five isothermal curves,a kinetic model was established and the mechanism function was found.As all data showed that reaction progress was short and reaction rate was high,it is best to avoid external heating and sudden energy transfer during DCBP manufacture,transportation and storage.Meanwhile,emergency rescue plans should be prepared for minimization of loss once accident happens. |
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| Keywords: | thermal decomposition kinetics autocatalysis isothermal model mechanism function |
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