{"title":"Thermal Decomposition Properties and Thermal Hazard Assessment of Di(2,4-dichlorobenzoyl) Peroxide (DCBP)","authors":"Juanni Zhou, Chen Zhao, Lijing Zhang, Gang Tao","doi":"10.1021/acs.oprd.4c00315","DOIUrl":null,"url":null,"abstract":"Di(2,4-dichlorobenzoyl) peroxide (DCBP), as an important organic peroxide (ops), is commonly used as a vulcanizing agent in the vulcanization process of organosilicon pressure-sensitive rubber belts. Due to double peroxide bonds, DCBP may incur decomposition and release much energy. The thermal decomposition characteristics of DCBP were investigated by differential scanning calorimetry (DSC). The initial decomposition temperature (<i>T</i><sub>0</sub>), peak temperature (<i>T</i><sub>p</sub>), and heat of decomposition (Δ<i>H</i>) have been obtained from non-isothermal experimental data. The autocatalytic properties are determined by DCBP isothermal experiments. Based on the Kissinger, Flynn–Wall–Ozawa (FWO), Starink, and Malek methods, the kinetic analysis of the experimental results obtained from the non-isothermal experiments was carried out. The three kinetic factors, such as the apparent activation energy <i>E</i><sub>α</sub>, the pre-exponential factor <i>A</i>, and the mechanism function <i>f</i>(α), were calculated. The thermodynamic parameters such as the maximum temperature rise rate ((d<i>T</i>/d<i>t</i>)<sub>max</sub>) and adiabatic temperature rise (Δ<i>T</i><sub>ad</sub>) under adiabatic conditions were obtained by accelerated rate calorimetry (ARC). The kinetic factors were calculated. The risk assessment of DCBP was carried out through the oxygen balance method and Self-Accelerating Decomposition Temperature (SADT) to provide safety guidance for DCBP in practical applications.","PeriodicalId":55,"journal":{"name":"Organic Process Research & Development","volume":"67 1","pages":""},"PeriodicalIF":3.1000,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Organic Process Research & Development","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1021/acs.oprd.4c00315","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
引用次数: 0
Abstract
Di(2,4-dichlorobenzoyl) peroxide (DCBP), as an important organic peroxide (ops), is commonly used as a vulcanizing agent in the vulcanization process of organosilicon pressure-sensitive rubber belts. Due to double peroxide bonds, DCBP may incur decomposition and release much energy. The thermal decomposition characteristics of DCBP were investigated by differential scanning calorimetry (DSC). The initial decomposition temperature (T0), peak temperature (Tp), and heat of decomposition (ΔH) have been obtained from non-isothermal experimental data. The autocatalytic properties are determined by DCBP isothermal experiments. Based on the Kissinger, Flynn–Wall–Ozawa (FWO), Starink, and Malek methods, the kinetic analysis of the experimental results obtained from the non-isothermal experiments was carried out. The three kinetic factors, such as the apparent activation energy Eα, the pre-exponential factor A, and the mechanism function f(α), were calculated. The thermodynamic parameters such as the maximum temperature rise rate ((dT/dt)max) and adiabatic temperature rise (ΔTad) under adiabatic conditions were obtained by accelerated rate calorimetry (ARC). The kinetic factors were calculated. The risk assessment of DCBP was carried out through the oxygen balance method and Self-Accelerating Decomposition Temperature (SADT) to provide safety guidance for DCBP in practical applications.
期刊介绍：
The journal Organic Process Research & Development serves as a communication tool between industrial chemists and chemists working in universities and research institutes. As such, it reports original work from the broad field of industrial process chemistry but also presents academic results that are relevant, or potentially relevant, to industrial applications. Process chemistry is the science that enables the safe, environmentally benign and ultimately economical manufacturing of organic compounds that are required in larger amounts to help address the needs of society. Consequently, the Journal encompasses every aspect of organic chemistry, including all aspects of catalysis, synthetic methodology development and synthetic strategy exploration, but also includes aspects from analytical and solid-state chemistry and chemical engineering, such as work-up tools，process safety, or flow-chemistry. The goal of development and optimization of chemical reactions and processes is their transfer to a larger scale; original work describing such studies and the actual implementation on scale is highly relevant to the journal. However, studies on new developments from either industry, research institutes or academia that have not yet been demonstrated on scale, but where an industrial utility can be expected and where the study has addressed important prerequisites for a scale-up and has given confidence into the reliability and practicality of the chemistry, also serve the mission of OPR&D as a communication tool between the different contributors to the field.
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