Product category:
Viscometers and rheometers
News Release from: Ultrasonic Scientific | Subject: HR-US
Edited by the Laboratorytalk Editorial
Team on 01 March 2004
Rheologists invited to learn about
ultrasonics
High-resolution ultrasonic spectroscopy is a novel analytical technique based on the measurements of parameters of low energy waves of longitudinal deformations propagating through analysed samples
Rheologists are being invited to contact Ultrasonic Scientific for information and demonstrations of the application of high-resolution ultrasonic spectroscopy (HR-US) for high-frequency rheological characterisation of emulsions, suspensions, solutions of polymers and other materials High-resolution ultrasonic spectroscopy is a novel analytical technique based on the measurements of parameters of low energy waves of longitudinal deformations propagating through analysed samples
This article was originally published on Laboratorytalk on 29 Nov 2001 at 8.00am (UK)
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This provides information on the interaction of ultrasonic waves with the samples interior thus allowing the analysis of its physical and chemical properties.
The measured values of ultrasonic velocity and attenuation can be recalculated into the longitudinal storage and loss moduli of the sample.
Unlike conventional rheometers, which are unable to measure directly the processes and interactions at the microscopic and molecular levels, the new award winning HR-US family of spectrometers from Ultrasonic Scientific have reduced the guess-work, enabling the effect of a change in formulation, process, and raw material to be analysed directly, quickly and easily at the nano level.
Very short linear visco-elastic regions (eg, in weak particle gels) can be explored, as the amplitude of the motion induced in the sample is very small.
Very short relaxation time processes can also be detected because of the short period of deformation in the ultrasonic wave.
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