Calorimetric technique to evaluate thermokinetic model on incompatible hazards of tert-butyl peroxy-2-ethyl hexanoate mixed with metal ions

• Main Authors: Yun-Ting Tsai, 蔡昀廷
• Other Authors: Chi-min Shu
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/01451463122184494362

碩士 === 國立雲林科技大學 === 環境與安全衛生工程系碩士班 === 100 === Tert-butyl peroxy-2-ethyl hexanoate (TBPO), an organic peroxide, used as initiator for polymerization of styrene, has inherent characteristic of triggering highly exothermic reaction. Mixing with contaminant, such as metal ions, may incur incompatible hazard and runaway reaction under an abnormal situation. This study investigated Cu2+, Ni2+, Fe2+, and Fe3+ individually affected thermal decomposition of TBPO. The aim of this study was to explore thermal hazard of TBPO mixed with metal ions by calorimetric analysis techniques combined with thermokinetic model. We employed non-isothermal and isothermal calorimeters to obtain various thermokinetic parameters and safety parameters, such as exothermic onset temperature (To), maximum temperature (Tmax), heat of decomposition (∆Hd), and final temperature (Tf) by differential scanning calorimetry (DSC) and maximum heat flow (Qmax), time to maximum rate under isothermal condition (TMRiso), activation energy (Ea), and frequency factor (A) by thermal activity monitor III (TAM III). Moreover, CISP (ChemInform Saint-Peterburg Software), a thermal safety analysis software, was applied to predict self-accelerating decomposition temperature (SADT). From the experimental results, Cu2+ could affect TBPO to increase Qmax more than three times as compared to the rest and to shorten the reaction time.