Affiliation:
1. Beijing University of Chemical Technology
Abstract
In this paper, employing the mixing theory of polymer and the numerical simulation of polymer processing, numerical simulation model for dispersive mixing of solid powders in polymer matrix is studied, and a multi factor accumulative size distribution function is established. Based on this, the dispersive mixing processes of black carbon/natural rubber are studied using three-dimension dynamic numerical simulation, and the influences of operating conditions on the dispersive mixing of black carbon are analyzed. The simulation results show that the final size of solid powder aggregates is depended on the rotational speed of rotors. When the maximum shear stress of polymer flow field is sufficient to overcome the cohesive force of solid powder aggregates, the size of aggregates distribution will be related with mixing time.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Reference15 articles.
1. J. Raasch, Beauspruchung und Verhalten Suspendieru Feststoffeilchen in Scherstro-mungen hoher Festigker, first ed., TH Karlsruhe, Germany, (1961).
2. G. Martin, Uniterschung der homogenizer-funktion von Einschneckenextrudern fur die Kunststoffver-arbeitung, first ed., Universitat Karlsruhe, Germany, (1972).
3. G. Lidor, Z. Tadmor, Theoretical analysis of residence time distribution functions and strain distribution functions in plasticating screw extruders, Polym. Eng. Sci. 16 (1975) 450-462.
4. Z. Tadmor, Mixing and residence time distribution in melt screw extruders, Polym. Eng. Sci. 10 (1970) 279-288.
5. I. Mans-Zloczower, A. Nir, Z. Tadmor, Dispersive mixing in internal mixers. A theoretical model based on agglomerate rupture, Rubber Chem. Technol. 55 (1982) 1250-1285.