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  • 1 National Yunlin University of Science and Technology Process Safety and Disaster Prevention Laboratory, Department of Safety, Health, and Environmental Engineering Sec. 3, Touliu, Yunlin Taiwan 64002 123, University Rd. Sec. 3, Touliu, Yunlin Taiwan 64002 123, University Rd.
  • | 2 Nursing, and Management Jen-Teh Junior College of Medicine Houlong, Miaoli Taiwan 356 1, Jin-Ten Rd. Houlong, Miaoli Taiwan 356 1, Jin-Ten Rd.
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Abstract  

This study discussed the phenomena on thermal polymerization of α-methylstyrene (AMS). A curve scanned by temperature-programmed technique was performed by differential scanning calorimetry (DSC). Heat of polymerization (ΔH) and onset temperature of exothermic (T0) behavior were determined to be 28010 J g-1 and about 1381C, respectively. A dimer formation mechanism was proposed for initiation of the propagating chain. Spectroscopic identification of dimer structure was conducted by infrared (IR) spectroscopy in the wavenumber from 650 to 1100 cm-1associated with molecular fingerprint characteristics. The mechanism of thermal polymerization on α-methylstyrene proposed in this study was similar to that of styrene suggested by Mayo.