Thermokinetics
evaluation and simulations for the polymerization of styrene in the presence
of various inhibitor concentrations |
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| Authors: | C C Liao S H Wu T S Su M L Shyu C M Shu |
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| Institution: | (1) Process Safety and Disaster Prevention Laboratory, Department of Safety, Health, and Environmental Engineering , National Yunlin University of Science and Technology, Touliu, Yunlin, Taiwan, ROC, 64002, 123, University Rd., Sec. 3;(2) Department of Safety, Health, and Environmental Engineering, , Central Taiwan University of Science and Technology, Taichung, Taiwan, ROC, 406, 11, Buh-Tzyy Alley, Buh-Tzyy Village, Beei-Twen District;(3) University of Miami, Coral Gables, Miami, USA, FL 33124 |
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| Abstract: | Styrene
is an important commodity chemical that is globally applied in various polymerization
processes. The aim of this study was to obtain integrated thermokinetics and
safety parameters for polymerization of styrene. We mainly used differential
scanning calorimetry (DSC), thermal activity monitor (TAM), and simulative
methods to investigate thermal polymerization of styrene and styrene containing
various levels of 4-tertiary-butylcatechol
(TBC). The results obtained included the rate constant (k),
reaction order (n), apparent activation
energy (E
a), frequency
factor (A), and so on, from various DSC
curves and simulative methods. From DSC curves, the exothermic onset temperature
(T
0) was about 105
and 132°C for styrene and styrene containing 10 ppm TBC. On the other
hand, the test results from TAM indicated that styrene polymerization displays
an autocatalytic phenomenon from 50–85°C. By means of this study,
the intrinsic safety of a system for styrene during transportation and storage
could be established. |
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| Keywords: | DSC styrene TAM TBC thermal polymerization |
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