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Complex thermal evaluation for 2,2′-azobis(isobutyronitrile) by non-isothermal and isothermal kinetic analysis methods

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Abstract

Azo compounds are widely used in dyes, pigments, blowing agents, and initiators. Unfortunately, these compounds contain the bivalent –N–N– composition which might be cleavaged readily even under high ambient temperature. The self-accelerating decomposition might cause a runaway reaction and lead to a fire or explosion when the cooling system fails or other upsets occur. To investigate the thermal stability parameters of 2,2′-azobis(isobutyronitrile) with thermal hazard and mechanism, differential scanning calorimetry and thermal activity monitor III were applied with non-isothermal method and isothermal method to obtain onset temperature (T 0), maximum temperature (T max), and heat of decomposition (ΔH d). Thermal stability parameters play a pivotal role in thermal analysis, leading particularly to complex evaluation of the inherently safer design during preparation, processing, transport, or storage. The results provide sufficient thermokinetic parameters for process safety in terms of proactive loss prevention program.

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Abbreviations

E a :

Apparent activation energy (kJ mol−1)

∆H d :

Heat of decomposition (J g−1)

∆H f :

Heat of fusion (J g−1)

Q max :

Maximum peak power at time (W g−1)

R :

Ideal gas law constant (8.31415 J K−1 mol−1)

T 0 :

Onset temperature (°C)

T p :

Peak temperature (°C)

T max :

Maximum temperature (°C)

T me :

Melting temperature (°C)

T mf :

Fusion temperature (°C)

TMRiso :

Time to maximum rate under isothermal conditions (h)

β :

Heating rate (°C min−1)

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Acknowledgements

The authors are indebted to the donors of the National Science Council (NSC) in Taiwan under the Contract Number NSC101-2221-E-407-001-MY3 for financial support.

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Authors and Affiliations

  1. Doctoral Program, Department of Safety, Health, and Environmental Engineering, National Yunlin University of Science and Technology, YunTech, 123, University Rd., Sec. 3, Douliou, Yunlin, 64002, Taiwan, ROC

    Shang-Hao Liu

  2. Department of Safety, Health, and Environmental Engineering, National Yunlin University of Science and Technology, YunTech, 123, University Rd., Sec. 3, Douliou, Yunlin, 64002, Taiwan, ROC

    Yen-Pin Yu, Yu-Chi Lin & Sheng-Yi Weng

  3. Department of General Education Center, Chienkuo Technology University, 1, Chiehshou North Rd., Changhua, 50046, Changhua, Taiwan, ROC

    Tung-Feng Hsieh

  4. Department of Occupational Safety and Health, Jen-Teh Junior College of Medicine, Nursing and Management, 1, Jen-Teh Rd., Houlong, Miaoli, 35665, Taiwan, ROC

    Hung-Yi Hou

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  1. Shang-Hao Liu
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  2. Yen-Pin Yu
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  3. Yu-Chi Lin
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  4. Sheng-Yi Weng
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  5. Tung-Feng Hsieh
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Correspondence to Hung-Yi Hou.

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Liu, SH., Yu, YP., Lin, YC. et al. Complex thermal evaluation for 2,2′-azobis(isobutyronitrile) by non-isothermal and isothermal kinetic analysis methods. J Therm Anal Calorim 116, 1361–1367 (2014). https://doi.org/10.1007/s10973-013-3632-z

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  • DOI: https://doi.org/10.1007/s10973-013-3632-z

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