Thermal Decomposition Properties and Thermal Hazard Assessment of Di(2,4-dichlorobenzoyl) Peroxide (DCBP)

化学 等温过程 热力学 热分解 分解 差示扫描量热法 自催化 活化能 绝热过程 均分解 过氧化物 物理化学 有机化学 激进的 物理 催化作用
作者
Juanni Zhou,Chen Zhao,Lijing Zhang,Gang Tao
出处
期刊:Organic Process Research & Development [American Chemical Society]
标识
DOI:10.1021/acs.oprd.4c00315
摘要

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.
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