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Rheological Societies, Bouton J, Guerrero A, Young NWG: The Society's Site Mar 2002 - Aug 2002 , Appl. Rheol. 12 (2002) 45.
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Mavrantzas VG, Tsamopoulos J: The 3rd International Conference of the Hellenic Society of Rheology (HSR), Appl. Rheol. 12 (2002) 35.
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Eischen JC, Windhab EJ: Viscosity of Cocoa and Chocolate Products, Appl. Rheol. 12 (2002) 32.
The viscoelastic properties of a magneto-rheological fluid can be variably controlled using a magnetic field. A new measuring method is introduced which is based on oscillatory tests. In contrast to flow curves from experiments at steady shear rate, the new method allows an exact determination of a magneto-rheological fluid.s viscoelastic properties as a function of the preset magnetic field strength. The .Magneto Sweep. is an oscillatory test method, each with constant amplitude and constant frequency while logarithmically increasing the magnetic field strength (Magneto Sweep). For typical magneto-rheological fluids (MRF) three characteristic regions and two significant transition points can be determined. These transitions mark the corresponding change in material behavior resulting from an increasing magnetic field strength.► Cite this publication as follows:
Wollny K, Lä, uger J, Huck S: Magneto Sweep - A Method for characterizing the Viscoelastic Properties of Magneto-Rheological Fluids, Appl. Rheol. 12 (2002) 25.
Due to a number of practical difficulties, both in- and on-line measurements of the rheological properties of complex systems during extrusion are usually performed at the end of the extruder, under very specific experimental conditions. This makes this type of instruments more useful for quality control than for process optimisation, since information about the influence of the geometry and/or processing conditions on the evolution of the material characteristics inside the extruder is not easily gathered. Recently, however, the authors have developed an on-line capillary rheometry system that overcomes most of the existing problems and allows small amounts of sample to be tested in very near real time, along the extruder. The present work aims at illustrating the usefulness of this concept for the study of physical compounding processes and some reactive systems. Two very different systems will be used for that purpose: a reactive extrusion process (the peroxide-induced thermal degradation of polypropylene) and the dispersive mixing involved in the preparation of thermoplastic/carbon fibre composites.► Cite this publication as follows:
Maia JM, Carneiro OS, Machado AV, Covas JA: On-Line Rheometry for Twin-Screw Extrusion (Along the Extruder) and its Applications, Appl. Rheol. 12 (2002) 18.
The grouts are suspensions containing cement used in the technique of prestressing by post-tension. Cement, from its chemical nature, protects the wire ropes (strands) from corrosion. To be able to play correctly this protective role, the grout must remain homogeneous and must entirely cover the strands. The lack of stability of the grouts, which results in packing or sedimentation, is a major problem. In this article, we try to correlate the rheological properties of the grout with its capacity to remain homogeneous. We show that an increase in the concentration of superplasticizer, a polymer solution, decreases the thixotropic behavior of the grout, but on the other hand, increases the effects of sedimentation. We explain this phenomenon by the modification of the structure of a three-dimensional network in relation to the interparticle interactions.► Cite this publication as follows:
LeRoy R, Boucenna I, Flaud P: Stability of Cement Grout: Study of Sedimentation Phenomena, Appl. Rheol. 12 (2002) 12.Peter Fischer
Engineering Rheology - Second Edition (R.I. Tanner)
Appl. Rheol. 12:1 (2002) 10-11 ►
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Fischer P: Engineering Rheology - Second Edition (R.I. Tanner), Appl. Rheol. 12 (2002) 10.
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