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了解震荡测试中的仪器惯量因素

发布时间: 2016-04-01 11:18 来源: TA仪器
领域: 纳米材料,高分子材料
样品:材料项目:震荡测试
参考:流变

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了解震荡测试中的仪器惯量因素

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Results from oscillation tests performed with rotational rheometer can be corrupted due to huge instrument inertia contributions, related to the periodic acceleration and deceleration of the motor shaft. In a rheometer the torque output of the motor is composed of the torque required to overcome the instrument inertia and the torque deforming the sample. The torque contributions for inertia increase with the applied frequency to the power two and usually dominate the instrument response for low viscosity test samples. Rotational rheometers with a separate transducer are much less susceptible to inertia effects, since the sample torque is determined independently from the motor torque.


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