Abstract
An apparatus has been designed and built up to determine the shear creep compliance and viscosity with high accuracy in a wide range of temperature and time. The characteristic feature of this apparatus is the possibility to measure directly the recoverable compliance and to determine the steady state recoverable complianceJ e . Disturbing instrumental forces are minimized by use of a magnetic bearing. The torque is applied inductively by a modified three phase asynchronous motor. The torsional angle is measured with a laser beam reflected from a mirror to an electro-optical measuring device. Sample thermostating is performed by radiation in a heating chamber, which allows observation of the specimen during measurement.
First results of creep and creep recovery measurements are reported, which were carried out on a technical polystyrene above the glass rubbery transition.
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Dedicated to Prof. Dr. H. Janeschitz-Kriegl on the occasion of his 60th birthday.
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Link, G., Schwarzl, F.R. Measuring device for precise evaluation of torsional creep and recovery data. Rheol Acta 24, 211–219 (1985). https://doi.org/10.1007/BF01332599
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DOI: https://doi.org/10.1007/BF01332599