A physical-mathematical model for the dispersion process in continuous mixers

To modify the properties of polymers, mineral fillers are frequently added during the compounding process. Because of adhesive forces, these pulverized fillers tend to agglomerate. Therefore, in order to achieve good homogenization, it is essential not only to distribute them but also to break down...

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Bibliographic Details
Published in:Polymer engineering and science 2002-01, Vol.42 (1), p.19-32
Main Authors: Potente, H., Kretschmer, K., Flecke, J.
Format: Article
Language:English
Subjects:
Applied sciences
Composites
Dispersion
Exact sciences and technology
Forms of application and semi-finished materials
Polymer industry
Polymer industry, paints, wood
Polymers
Technology of polymers
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Summary:To modify the properties of polymers, mineral fillers are frequently added during the compounding process. Because of adhesive forces, these pulverized fillers tend to agglomerate. Therefore, in order to achieve good homogenization, it is essential not only to distribute them but also to break down the solid agglomerates. A number of relating models have been published, describing observations (agglomerate rupture, erosion, clustering) made during the dispersion process in a mostly isolated manner. New models for each observed effect have been developed and later superimposed in order to get a comprehensive model of the dispersion process. To verify the model, it was implemented into a program for the process simulation of co‐rotating twin‐screw extruders. It was then compared to experimental data. The results showed that the model is able to describe the experimentally determined data.
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.10925