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 degree C to 340 degree C, and that of glow discharge polymer covered 350 degree C to 450 degree C. Degradation temperature kept fixed at the rate of 20 degree C/min and 30 degree C/min, and the temperature increased when the rate was no more than 20 degree C/min. (authors)