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Thermokinetic parameters and thermal hazard evaluation for three organic peroxides by DSC and TAM III

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Abstract

The thermokinetic parameters were investigated for cumene hydroperoxide (CHP), di-tert-butyl peroxide (DTBP), and tert-butyl peroxybenzoate (TBPB) by non-isothermal kinetic model and isothermal kinetic model by differential scanning calorimetry (DSC) and thermal activity monitor III (TAM III), respectively. The objective was to investigate the activation energy (E a) of CHP, DTBP, and TBPB applied non-isothermal well-known kinetic equation to evaluate the thermokinetic parameters by DSC. We employed TAM III to assess the thermokinetic parameters of three liquid organic peroxides, obtained thermal runaway data, and then used the Arrhenius plot to obtain the E a of liquid organic peroxides at various isothermal temperatures. In contrast, the results of non-isothermal kinetic algorithm and isothermal kinetic algorithm were acquired from a highly accurate procedure for receiving information on thermal decomposition characteristics and reaction hazard.

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Abbreviations

A :

Pre-exponential factor (s−1)

C A :

Sample concentration (mol L−1)

C p :

Heat capacity (J g−1 K−1)

E a :

Activation energy (kJ mol−1)

f(α) :

Kinetic functions

k :

Reaction rate constant (min−1)

k i :

Reaction rate constant at isothermal temperature (min−1, i = 0, 1, 2, 3)

k iso :

Rate constant at isothermal temperature (min−1, ISO = 80, 90, 100, 110, 120)

M :

Molecular weight (g mol−1)

m :

Sample mass (g)

n :

Reaction order (dimensionless)

Q :

Heat of decomposition at time t (W g−1)

Q 0 :

Total heat of decomposition (kJ kg−1)

Q t :

Decomposition heat released at time t (kJ kg−1)

R :

Gas constant (8.31415 J K−1 mol−1)

r :

Reaction rate (g s−1)

T 0 :

Exothermic onset temperature (°C)

T f :

Final temperature (°C)

T i :

Peak temperature of different scanning rates (°C, i = P1, P2, P3)

T j :

Different isothermal temperatures (°C, j = 0, 1, 2, 3)

TCL :

Time to conversion limit (day)

TMR iso :

Time to maximum rate under isothermal conditions (min)

T P :

Peak temperature (°C)

t :

Time (s)

α :

Conversion rate (dimensionless)

β i :

Scanning rate (°C min−1, i = 1, 2, 4, 10)

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Acknowledgements

The authors are indebted to the donors of the National Science Council (NSC) in Taiwan under the contract number NSC-96-2625-Z-224-001 for financial support.

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Authors and Affiliations

  1. Department of Safety, Health, and Environmental Engineering, National Yunlin University of Science and Technology (NYUST), 123, University Rd., Sec. 3, Douliou, Yunlin, 64002, Taiwan, ROC

    Shang-Hao Liu & Chi-Min Shu

  2. Department of Health and Nutrition Biotechnology, College of Health Science, Asia University, 500, Lioufeng Rd., Wufeng, Taichung, 41354, Taiwan, ROC

    Chun-** Lin

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  1. Shang-Hao Liu
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  2. Chun-** Lin
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Correspondence to Chi-Min Shu.

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Liu, SH., Lin, CP. & Shu, CM. Thermokinetic parameters and thermal hazard evaluation for three organic peroxides by DSC and TAM III. J Therm Anal Calorim 106, 165–172 (2011). https://doi.org/10.1007/s10973-011-1582-x

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