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Particular thermal behavior of 2,2′-azobis[2-(2-imidazolin-2-yl)propane] dihydrochloride using DSC and STA

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Abstract

2,2′-Azobis[2-(2-imidazolin-2-yl) propane] dihydrochloride (AIBI) is a class of initiators that share water-soluble features, which was widely employed in the chemical polymerization industry. The merits of AIBI are that it can conduct smooth, stable, and controllable decomposition reaction and initiate polymerization efficiently at low temperature and concentration. Unfortunately, due to the high formation enthalpy and through a large amount of gas release, AIBI has high-potential thermal hazards. Therefore, the thermal behavior of the whole decomposition process is analyzed through series of simultaneous thermogravimetric analyzer and differential scanning calorimetry tests coupled with the advanced thermal investigation. It is found that AIBI would rapidly decompose and abruptly release an enormous amount of heat in the range of 170 to 180 °C, but with only 10% mass loss in this period. These thermal parameters can be used to describe the thermal stability of AIBI, thus effectively preventing the thermal hazard and loss of control of AIBI in the process of production, transportation, and storage.

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Abbreviations

\(\alpha\) :

Conversion degree (mass%)

A :

Pre-exponential factor (s−1)

\(\beta\) :

Heating rate (K min−1)

E a :

Apparent activation energy (kJ mol−1)

\(E_{\alpha \to 0}\) :

Limit of kinetic parameter at \(\alpha \to 0\) (kJ mol−1)

Q p :

Peak power of reaction (W g−1)

R :

Universal gas constant 8.314 (J mol−1 K−1)

R 2 :

Fitting degree

T onset :

Onset decomposition temperature (°C)

T peak :

Peak decomposition temperature (°C)

ΔH d :

Heat release of decomposition

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Acknowledgements

The authors would like to express their sincere thanks to the Anhui University of Science and Technology in China under contract number QN201613 as well as to the Anhui Province Education Department, Natural Sciences Key Fund, China (Grant No. KJ2017A078).

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Authors and Affiliations

  1. State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology (AUST), Huainan, 232001, Anhui, China

    Shang-Hao Liu, Tong Wu, Yi-Ming Lu & Hai-Sheng Li

  2. School of Chemical Engineering, AUST, Huainan, 232001, Anhui, China

    Shang-Hao Liu

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  1. Shang-Hao Liu
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Liu, SH., Wu, T., Lu, YM. et al. Particular thermal behavior of 2,2′-azobis[2-(2-imidazolin-2-yl)propane] dihydrochloride using DSC and STA. J Therm Anal Calorim 144, 343–349 (2021). https://doi.org/10.1007/s10973-020-10053-x

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  • DOI: https://doi.org/10.1007/s10973-020-10053-x

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