如何正确地进行剪切流变测试(15)

图 8
Figure 8. Vector diagram of torques, including acceleration torque Ta, total or electrical torque T0, and sample torque Ts, where δδ and αα are phase angle of T0 and Ts, respectively. The sample torque can be decomposed into viscous part Tv and elastic part Te (Reprinted with permission from Ref.[31]; Copyright (2016) Society of Rheology).

其中，仪器测试的实测扭矩T0等于样品扭矩Ts和仪器加速惯量产生的扭矩Ta之和. 换言之，样品产生的扭矩应该等于总扭矩减去仪器加速时惯量产生的扭矩，该扭矩可利用相位角分解成弹性贡献部分Te和黏性贡献部分Tv.
此外，Lauger等研究表明[31].：对于牛顿流体，惯量产生的扭矩与样品扭矩的比率可表达为