Eight Decades In One Rheometer: Exploring the dynamics of complex polymers, measuring from millihertz to a hundred kilohertz in a single device
ORAL
Abstract
We present an investigation of the shear mechanical dynamics of filled and unfilled rubbers across eight decades in frequency.
Using experience from the science of glasses and viscous liquids, we developed a shear rheometer capable of measuring polymer moduli across an extremely broad range of frequencies (1 mHz-100 kHz).
The rheometer is applied in the investigation of filled and unfilled rubbers spanning a temperature range of more than 100 K.
In combination, this has done away with the need for assuming time-temperature superposition or the construction of master curves.
The work has applications in polymer science, as well as in industry.
A motivation has been the possibility of investigating tyre rubbers under conditions closely resembling the end use in terms of frequencies and temperatures.
This work was supported by the Villum Foundation’s Matter grant (grant no. 16515) and by Innovation Fund Denmark (case no. 9065-00002B).
Using experience from the science of glasses and viscous liquids, we developed a shear rheometer capable of measuring polymer moduli across an extremely broad range of frequencies (1 mHz-100 kHz).
The rheometer is applied in the investigation of filled and unfilled rubbers spanning a temperature range of more than 100 K.
In combination, this has done away with the need for assuming time-temperature superposition or the construction of master curves.
The work has applications in polymer science, as well as in industry.
A motivation has been the possibility of investigating tyre rubbers under conditions closely resembling the end use in terms of frequencies and temperatures.
This work was supported by the Villum Foundation’s Matter grant (grant no. 16515) and by Innovation Fund Denmark (case no. 9065-00002B).
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Publication: Mikkelsen et al. Piezo-Electric Shear Rheometry: Further developments in experimental implementation and data extraction. Submitted to Journal of Rheology. <br>Mikkelsen et al. Closing the Gap in Broadband Mechanical Spectroscopy: An investigation of shear mechanical dynamics of filled and unfilled rubbers. In preparation.
Presenters
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Mathias Mikkelsen
Roskilde University and Research and Development, Continental, Germany
Authors
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Mathias Mikkelsen
Roskilde University and Research and Development, Continental, Germany
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Jorge Lacayo-Pineda
Research and Development, Continental & Institut für Anorganische Chemie, Leibniz Universität Hannover
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Tina Hecksher
Roskilde University
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Tage E Christensen
Roskilde University