The influences of shear rates on flow activation energy was investigated.Activation energy of PP,LDPE and LLDPE resins were higher than HDPE at the same shear rate.

• 结果发现,相同剪切速率下,PP、LDPE、LLDPE的粘流活化能相对较高,HDPE树脂的粘流活化能相对较低,说明PP、LDPE和LLDPE对温度的敏感性较高,即升温有利于LDPE和LLDPE的加工;