Rheologica Acta
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Measurement of microscopic rheological properties in oil-in-water emulsions via spherical nanoindentation
Rheologica Acta - Tập 62 - Trang 631-640 - 2023
Techniques for evaluating the micromechanical properties of materials are crucial in engineering fields. In previous studies, many researchers have utilized atomic force microscopy (AFM) to address these subjects. However, there are few data on dispersion systems, such as slurries and creams, due to the AFM tip having a nanoscale length. These materials are essential in industrial and engineering ...... hiện toàn bộ
Viscous properties of polymer melts and elastomers exemplified by ethylene-propylene copolymer
Rheologica Acta - Tập 6 - Trang 209-222 - 1967
The copolymer of ethylene and propylene possesses a sufficiently high thermo-oxidative resistance, making it possible to study its viscous properties, determine the appearance of elastic turbulence and wall slippage and to measure the rate of the latter over a wide interval of temperatures ranging from room temperature to 260 °C. At low shear stresses and rates the copolymer behaves like aNewtonia...... hiện toàn bộ
Elastizitätsmessungen an Polyacrylnitril-Lösungen
Rheologica Acta - Tập 18 - Trang 717-723 - 1979
Lösungen von Polyacrylnitril (PAN) in Dimethylformamid (DMF) mit Konzentrationen von 0,05 bis 0,175 kg/l wurden in zwei Zylinder-Viskosimetern bei 22°C untersucht. Die Anlaufmessungen im Elastoviskosimeter nachLederer undSchurz, das durch einen Neubau betriebssicher gemacht wurde, ergaben eine Zunahme des Ruheschermoduls mit der vierten Potenz der Konzentration oberhalb 0,08 kg/l. Die Rückfederung...... hiện toàn bộ
The charged dumbbell model for dilute polyelectrolyte solutions in strong flows
Rheologica Acta - - 1984
Viscometric flows of polymeric melts treated according to the rational theory of Eckart's continuum. I. General theory
Rheologica Acta - Tập 26 Số 2 - Trang 127-134 - 1987
Reversibles und irreversibles Fließen von Hochmolekularen
Rheologica Acta - Tập 1 - Trang 495-505 - 1961
Es wird gezeigt, daß zwischen der Platzwechseltheorie und der linearen phänomenologischen Relaxationstheorie für das plastisch-elastische Verhalten keine Widersprüche bestehen. Die Platzwechseltheorie führt zu nichtlinearen Beziehungen, und die bekannten Gleichungen ergeben sich, indem statt der hyperbolischen Beziehungen jeweils die ersten Näherungen verwendet werden. Fließvorgänge, die durch ver...... hiện toàn bộ
Evaluating Herschel-Bulkley fluids with the back extrusion (annular pumping) technique
Rheologica Acta - Tập 30 - Trang 549-558 - 1991
A mathematical model was developed to describe the behavior of Herschel-Bulkley fluids in a back extrusion (annular pumping) device. A technique was also developed to determine the rheological properties (yield stress, flow behavior index, and consistency coefficient) of these fluids. Mathematical terms were expressed in four dimensionless terms, and graphical aids and tables were prepared to faci...... hiện toàn bộ
The time-dependent rheology of fermenting wheat flour dough: effects of salt and sugar
Rheologica Acta - Tập 57 - Trang 813-827 - 2018
The in situ study of the linear viscoelastic behaviour of complex biological materials with changing volume, such as fermenting dough, poses great challenges to the rheologist. The aim of this study is to develop a new methodology involving a parallel-plate setup with an adjustable gap, to enable time-tracking of the dynamic moduli and density of fermenting dough. Frequency sweep snapshots at spec...... hiện toàn bộ
Experimental investigations into an isothermal spinning threadline: Extensional rheology of a Separan AP 30 solution in glycerol and water
Rheologica Acta - - 1975
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