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Thomas SchweizerAuthor index ►
Structure and rheology of molten polymers (J.M. Dealy, R.G. Larson)
Appl. Rheol. 17:5 (2007) 258-259 ►
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Schweizer T: Structure and rheology of molten polymers (J.M. Dealy, R.G. Larson), Appl. Rheol. 17 (2007) 258.
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Schweizer T: Rheology. Concepts, Methods, and Applications (A. Ya. Malkin, A.I. Isayev), Appl. Rheol. 16 (2006) 240.
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Schweizer T: Einfluss von Dehnströmungen auf die Morphologieausbildung in Polymerblends / Influence of Elongational Flows on the Morphology Evolution of Polymer Blends (M. Heindl), Appl. Rheol. 16 (2006) 131.Thomas Schweizer
Polymer Viscoelasticity (Yn-Hwang Lin)
Appl. Rheol. 15:4 (2005) 202-203 ►
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Schweizer T: Polymer Viscoelasticity (Yn-Hwang Lin), Appl. Rheol. 15 (2005) 202.
The calibration of the temperature control unit of a rotational rheometer with a hood oven is shown. The calibration technique shown for a Paar-Physica rheometer can be adapted to any rheometer with hood oven (indirect heating). The temperature of the bottom fixed plate and the air bearing suspended cone or plate are measured independently. By keeping the amount of venting gas constant, the set temperature of the hood oven is adjusted to reach a minimum gradient across the measuring gap. The calibration procedure is optimized to keep the oven as close as possible to the measuring position.► Cite this publication as follows:
Schweizer T: Temperature Calibration of Rotational Rheometers with Electrically Heated Tools and Hood Oven, Appl. Rheol. 15 (2005) 112.
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Schweizer T: Handbook of Ellipsometry (Harland G. Tompkins, Eugene A. Irene, Eds.), Appl. Rheol. 15 (2005) 10.
The performance of tests with elastic liquids at high shear rates is cumbersome due to viscous dissipation heating, high normal forces, and - above all - edge fracture. This paper shows how such measurements can be improved and simplified over the conventional cone-plate technique by using a partitioned plate. For a polystyrene melt with zero shear viscosity 44.5 kPas at 190.C, steady state viscosities can be obtained up to 100 s-1. For samples with twice the diameter of the sensing area of the tool, the strain beyond which disturbances can be noticed is about 2 - 3 times higher than for conventional cone-plate. As a consequence of the design, precise viscosity measurements can be made without knowing the exact radius of the sample and without well centring it. This geometry is ideal for quick and dirty loading. Drawbacks are that the tool requires regular cleaning of the ring gap, that it can only be fitted to rheometers with a non-displacing force measuring cell (force rebalance transducer), and that it is not suited to measure low viscous systems such as polymer solutions.► Cite this publication as follows:
Schweizer T: A Quick Guide to Better Viscosity Measurements of Highly Viscous Fluids, Appl. Rheol. 14 (2004) 197.
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Schweizer T: Flow of polyolefine melts through dies,investigated by laser Doppler anemometry (Martin Schwetz), Appl. Rheol. 13 (2003) 284.
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Schweizer T: Influence of the molecular structure on the rheological properties of polystyrene and polycarbonate melts (Jens Hepperle), Appl. Rheol. 13 (2003) 284a.
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Schweizer T: Rheology for Polymer Melt Processing (J. M.-Piau, J.-F. Agassant, Eds.), Appl. Rheol. 10 (2000) 222.Thomas Schweizer
Werner Kuhn symposium
Appl. Rheol. 9:1 (1999) 34-37 ►
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Schweizer T: Werner Kuhn symposium , Appl. Rheol. 9 (1999) 34.
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