Applied Rheology: Publications

Appl Rheol online available publications for selected issue

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Delegates of the national rheological societies
Society's Site Mar 2003 - Aug 2003

Appl. Rheol. 13:1 (2003) 43-49

Cite this publication as follows:
Rheological Societies: Society's Site Mar 2003 - Aug 2003, Appl. Rheol. 13 (2003) 43.

Christian Carrot
37th Meeting of the French Group of Rheology (GFR)

Appl. Rheol. 13:1 (2003) 29-30

Cite this publication as follows:
Carrot C: 37th Meeting of the French Group of Rheology (GFR), Appl. Rheol. 13 (2003) 29.

M. Heindl, D. Auhl
6th European Conference on Rheology (eurheo 2002)

Appl. Rheol. 13:1 (2003) 26-28

Cite this publication as follows:
Heindl M, Auhl D: 6th European Conference on Rheology (eurheo 2002), Appl. Rheol. 13 (2003) 26.

Suneel, Richard S. Graham, Tom C.B. McLeish
Characterisation of an Industrial Polymer Melt Through either Uniaxial Extension or Exponential Shear Data: An Application of the Pom-Pom Model

Appl. Rheol. 13:1 (2003) 19-25

We present new non-linear data in extension and two different shear histories. These data are used to compare the effectiveness of using exponential shear data and uniaxial extension data to characterise the non-linear response of an industrial LDPE melt with the pom-pom molecular model. We conclude that extension and exponential shear both allow good predictions to be made in simple shear. However, the characterisation spectrum obtained from exponential shear data fails to predict the correct degree of strain hardening at low extension rates. From this study we are able to suggest circumstances under which exponential shear provides a useful characterisation of branched polymer melts.

Cite this publication as follows:
Suneel , Graham RS, McLeish TCB: Characterisation of an Industrial Polymer Melt Through either Uniaxial Extension or Exponential Shear Data: An Application of the Pom-Pom Model, Appl. Rheol. 13 (2003) 19.

Sabine Beckmann, Jürgen Niemeyer
Flow Patterns of Polymer Solutions Injected into Dispersions of Bentonite

Appl. Rheol. 13:1 (2003) 14-18

The flow behaviour of colloidal dispersions is largely influenced by the interactions between the dispersed particles. We studied the influence of either natural or synthetic polyelectrolytes solutions on flow patterns within colloidal clay dispersion. For this purpose, highly diluted aqueous polymer solutions were intruded into a radial Hele-Shaw cell filled with montmorillonite dispersions. The developing flow patterns were recorded with a high resolution digital camera. The morphological parameters: fractal dimension, total number of branching, branching density of the patterns, compactness and form were obtained by digital image analysis. The results show that the patterns are largely affected by the different polymers.

Cite this publication as follows:
Beckmann S, Niemeyer J: Flow Patterns of Polymer Solutions Injected into Dispersions of Bentonite, Appl. Rheol. 13 (2003) 14.

Russ Warley
Modeling the Pressure Decay Cure of a Capillary Rheometer

Appl. Rheol. 13:1 (2003) 8-13

A mathematical model for the transient pressure response in a capillary rheometer is implemented and validated with experimental data for both a natural rubber compound and a silicone rubber compound. The pressure decay curve after the cessation of motion of the instrument piston is shown to be consistent with the extrapolation of the power law model to shear rates two decades lower than experimentally attainable in the instrument employed. The model is useful for extending the range of the instrument in question by approximating material properties at shear rates lower than attainable in a steady flow experiment.

Cite this publication as follows:
Warley R: Modeling the Pressure Decay Cure of a Capillary Rheometer, Appl. Rheol. 13 (2003) 8.


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