Frequency response of a shear stress transducer installed in a sliding plate rheometer
作者:
John M. Dealy,
Ranjit S. Jeyaseelan,
期刊:
Journal of Rheology
(AIP Available online 1998)
卷期:
Volume 42,
issue 4
页码: 833-841
ISSN:0148-6055
年代: 1998
DOI:10.1122/1.550903
出版商: The Society of Rheology
关键词: Frequency response;Transducer;Sliding plate rheometer
数据来源: AIP
摘要:
A number of laboratories are currently using sliding plate rheometers equipped with shear stress transducers to study the nonlinear viscoelasticity and slip of molten polymers. In making such measurements, it is sometimes essential to know to what degree the dynamic response of the shear stress transducer itself is influencing the output signal. Experiments should be designed to minimize this effect, but some attenuation and phase shift is inevitable because of the presence of polymer inside the transducer. We have measured the dynamic response of a shear stress transducerin situin a sliding plate rheometer for two molten polyethylenes. We have also developed a model for the transducer response. In oscillatory shear experiments above a frequency of 1 Hz, the amplitude ratio and phase lead are significant for both materials studied.
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