Thermal gravity analysis of poly(alpha-methylstyrene) degradation temperature

Thermal gravity analysis was applied to obtain the thermal pyrolysis behaviour of four kinds of poly (alpha-methylstyrene) of different average relative molecular mass. Experiments indicated that the pyrolysis temperature of poly (alpha-methylstyrene) covered 220 ℃ to 340 ℃, and that of glow discharge polymer covered 350 ℃ to 450 ℃. Degradation temperature kept fixed at the rate of 20 ℃/min and 30 ℃/min, and the temperature increased when the rate was no more than 20 ℃/min.