By comparing the pyrolysis process of PAN in Ar with that in vacuum, it is found that the thermal activation energy in vacuum is lower than that in Ar, which indicates that the vacuum atmosphere favors the degradation reaction.

• 通过比较聚丙烯腈在氩气和真空氛围下的热解,可以得出聚丙烯腈在真空氛围中的热解反应活化能低于氩气氛围中的活化能,说明真空氛围能够降低热解反应的温度,加速反应的进行。