Thermal research on the uncontrolled behavior of styrene bulk polymerization |
| |
| Affiliation: | 1. College of Safety Science and Engineering, Nanjing Tech University, Nanjing, 210009, Jiangsu, China;2. Jiangsu Key Laboratory of Hazardous Chemicals Safety and Control, Nanjing, 210009, Jiangsu, China;1. Physics and Electronics Department, Adekunle Ajasin University, Akungba Akoko, 342111, Ondo State, Nigeria;2. Deanship of Graduate Studies, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia;3. Department of Mathematics, Computer Science Unit, Usmanu Danfodiyo University, Sokoto, Nigeria;4. Institute for Digital Communications, School of Engineering, University of Edinburgh, Edinburgh, EH9 3FG, United Kingdom;5. Computer Science Department, College of Computer Science and Information Technology, Imam Abdulrahman Bin Faisal University, Dammam, PO.Box 1982, Saudi Arabia;1. State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology (AUST), 168, Taifeng St., Anhui 232001, China;2. School of Chemical Engineering, AUST, 168, Taifeng St., Anhui 232001, China;3. Department of Safety, Health and Environmental Engineering, Hung-Kuang University, Taichung 43302, Taiwan;1. School of Chemical Engineering, Anhui University of Science and Technology, 168 Taifeng Street, Huainan, Anhui, 232001, China;2. Graduate School of Engineering Science and Technology, National Yunlin University of Science and Technology (YunTech), 123, University Rd., Sec. 3, Douliou, Yunlin, 64002, Taiwan |
| |
| Abstract: | Thermal runaway can occur during the styrene bulk polymerization process because of easily formed local hotspots resulting from the high viscosity of reactants and the difficulty of heat dissipation. To obtain the thermal hazard characteristics, the polymerization behavior of styrene was investigated using differential scanning calorimetry (DSC) at a scanning rate of β = 2 °C/min. Experimental results showed that the exothermic peaks obtained for heat initiation were different from those obtained when initiator was added. The exothermic peak changed from one to two after the initiator was added. The exothermic onset temperature (T0) was also reduced. Phi-tech II was utilized to study the bulk polymerization of styrene in an adiabatic environment. The adiabatic temperature rise (ΔTad), starting temperature of uncontrolled polymerization (Tstar), maximum temperature (Tend), and heat of polymerization (ΔH) under different conditions were acquired. When the dose of the additive was increased, the starting temperature of uncontrolled polymerization (Tstar) decreased and the adiabatic temperature rise (ΔTad) increased gradually. Severity grading was performed based on the severity evaluation criteria of runaway reaction. The results can help designers decide whether it is necessary to take certain measures to reduce risk. |
| |
| Keywords: | Styrene Bulk polymerization Severity grading Effective time |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
