Journal of Thermal Analysis and Calorimetry

, Volume 95, Issue 2, pp 559–563 | Cite as

Thermal runaway evaluation of α-methylstyrene and trans-β-methylstyrene with benzaldehyde

  • S. -Y. Lin
  • J. -M. Tseng
  • M. -K. Lee
  • T. -C. Wu
  • C. -M. Shu


Styrene is an important chemical in the petrochemical industry. In recent years, there have been sporadic releases, runaway reactions, fires, and thermal explosion accidents incurred by styrene and its derivatives worldwide. The purpose of this study was to estimate the impact of styrene and its derivatives of α-methylstyrene (AMS) and trans-β-methylstyrene (TBMS) contacting with benzaldehyde. Experiments were carried out to evaluate the thermokinetic parameters estimated by differential scanning calorimetry (DSC) and thermal activity monitor III (TAM III). TAM III was used to determine the fundamental thermokinetics under various isothermal temperatures, 80, 90 and 100°C. This autocatalytic reaction was demonstrated in thermal curves. After styrene was contacted with benzaldehyde, the exothermic onset temperature (T 0) and the total heat of reaction (Q total) were altered by DSC tests. When benzaldehyde is mixed with AMS and TBMS, the reaction time will be shorter but the enthalpy reduced, as revealed by TAM III tests.

As AMS and TBMS, respectively, were contacted with benzaldehyde, both exothermic phenomena were changed during the reaction excursion. According to the results of this research, an operator should dictate the oxygen concentration in order to avoid any potential hazards during handling and transportation.


benzaldehyde DSC α-methylstyrene (AMS) thermal activity monitor III (TAM III) trans-β-methylstyrene (TBMS) 


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2009

Authors and Affiliations

  • S. -Y. Lin
    • 1
  • J. -M. Tseng
    • 1
  • M. -K. Lee
    • 2
  • T. -C. Wu
    • 3
  • C. -M. Shu
    • 1
  1. 1.Graduate School of Engineering Science and TechnologyNational Yunlin University of Science and TechnologyDouliou, Yunlin, TaiwanROC
  2. 2.Department of Occupational Safety and HealthChia-Nan University of Pharmacy and ScienceJen-Te Tainan, TaiwanROC
  3. 3.Department of Safety, Health and Environmental EngineeringHungKuang UniversityShaLu, Taichung TaiwanROC

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