The piezoelectric axial vibrator (PAV) is a squeeze-flow rheometer working at frequencies between 1 and . It can be used to measure the storage modulus and the loss modulus of complex fluids in this frequency range. Using polymer solutions with known and it is shown that the PAV gives reliable mechanical spectra for frequencies between 10 and . The measurements done with the PAV are combined with a conventional mechanical rheometer and a set of torsional resonators (, 25, and ) to obtain and between and . Using this combination we present the first analysis of the viscoelasticity of an aqueous suspension of thermosensitive latex particles in this range of frequency. It is demonstrated that the combination of the three devices gives the entire mechanical spectra without resort to the time-temperature superposition principle.
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July 2005
Research Article|
July 01 2005
Characterization of the viscoelastic behavior of complex fluids using the piezoelastic axial vibrator
Jérôme J. Crassous;
Jérôme J. Crassous
Physikalische Chemie I,
University of Bayreuth
, 95440 Bayreuth, Germany
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Raphael Régisser;
Raphael Régisser
Physikalische Chemie I,
University of Bayreuth
, 95440 Bayreuth, Germany
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Matthias Ballauff;
Matthias Ballauff
a)
Physikalische Chemie I,
University of Bayreuth
, 95440 Bayreuth, Germany
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Norbert Willenbacher
Norbert Willenbacher
Polymer Research Division,
BASF Aktiengesellschaft
, D-67056 Ludwigshafen, Germany
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a)
Author to whom all correspondence should be addressed; electronic mail: [email protected]
J. Rheol. 49, 851–863 (2005)
Article history
Received:
December 08 2004
Citation
Jérôme J. Crassous, Raphael Régisser, Matthias Ballauff, Norbert Willenbacher; Characterization of the viscoelastic behavior of complex fluids using the piezoelastic axial vibrator. J. Rheol. 1 July 2005; 49 (4): 851–863. https://doi.org/10.1122/1.1917843
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