Numerical and experimental study of dispersive mixing of agglomerates

Abstract : The degree of filler dispersion has a major influence on the physical properties of rubber compounds. Typical fillers, e.g. carbon black and silica, are difficult to disperse, particularly if they are fine and low structured. As a result, the quantity of undispersed fillers generally amounts for 1% to 10% of the compound. The elimination, or at least the reduction, of agglomerates will result in rubber parts (e.g. tires, seals, belts) with improved properties and higher reliability. Clearly, a better understanding of the physics of batch mixers would help improve their mixing performance. Due to the complexity of the real process, experiments on a representative device were held from which a model has been deduced. It appears to be a generalization of the law of Kao and Mason, but for high viscous matrices. The next step was to get a model available for statistically large number of pellets as can be found in any sample taken out of the mixer. A statistical approach is used where we define a model describing the evolution of mass density function of agglomerate sizes. Eventually, we implement this model within available numerical simulation tools to estimate dispersion in real mixers.
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  • HAL Id : hal-00672092, version 1

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Véronique Collin, Edith Peuvrel-Disdier, B. Alsteens, Vincent Legat, T. Avalosse, et al.. Numerical and experimental study of dispersive mixing of agglomerates. Society of Plastics Engineers Annual Technical Conference 2006, ANTEC 2006, May 2006, Charlotte, NC, United States. pp.Pages 908-912. ⟨hal-00672092⟩

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