煤沥青的热分析

THERMAL ANALYSIS OF COAL TAR PITCH

采用溶剂分离的方法对煤沥青进行组分分离,并通过TG,DTG以及DSC对煤沥青及α树脂、β树脂和γ树脂进行了分析.结果表明,煤沥青中重组分的热失重开始温度及最大失重速率温度较高,煤沥青与β树脂和γ树脂在400℃～500℃范围内均出现两个放热峰,α树脂在400℃～500℃范围内只有一个放热峰.

Coal tar pitch were separated into α, β and γ resin by the method of solvent ex- traction. Coal tar pitch,α, β and γ resin were analyzed by TG, DTG and DSC. The results show that the heavy fraction has a higher temperature of initial weight loss and a higher temperature of maximum rate of weight loss than that of light fraction. Coal tar pitch, β and γ resin have two exothermic peaks in the region of 400 ℃-500 ℃, while α resin has only one exothermic peak in the region of 400 ℃-500 ℃.