Forschung Zur Rubrik

Sechs Abbildungen von mikroskopischen Ansichten.
The mechanical Properties of filled Elastomers are strongly influenced by the Distribution of Filler within the Polymer Matrix

A coarse grained Model for the Simulation of dynamic Properties of filled Elastomers

We describe a modelling approach to the calculation of dynamic moduli of filled elastomers based on filler morphologies derived from the experimental interface tensions of the material‘s components. The proposed approach consists of two main parts. The first one is a Monte Carlo-based morphology generator, which is used to build model compounds on the µm-scale. In the second part, the Monte Carlo morphologies are mapped onto a topologically identical model, allowing to obtain the dynamic moduli. This combination of models ties the experimental surface tensions, characterizing the individual components, to the dynamic behavior of the macroscopic material.

Buntes Infrarot Characteristic Diagramm.
Factors that Influence wall Slip during Rubber Processing in the Extrusion Process were investigated

Optimisation of the Simulation of Rubber Extrusion dies by means of the Integration of empirically determined charac-teristic Maps

By determining characteristic maps that describe the wall slip as a function of the compound composition and the extrusion temperature, boundary conditions in flow simulations can be determined in such a way that the effects on pressure and temperature distribu-tion in the extrusion process are considered. This enables an improved die design with fewer iteration steps. In addition, by means of a 2D simulation of the exit geometry, which only requires the pressure loss in the die as an input variable, the die geometry can be determined with minimal computing times in such a way that the extrudate geometry after swelling corresponds to the desired profile geometry.

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