Modeling Filler Dispersion along a Twin-Screw Extruder
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T. Lozano
Abstract
Particle size distribution strongly affects physical and mechanical properties of filled polymers. A new model has been developed to predict agglomerate size distribution in a twin-screw extruder (TSE). The model considers the break-up and erosion processes and it uses agglomerate size population balance in its mathematical formulation. The model parameters were evaluated in simple field flow. This paper shows the validation of the model along the extruder using different screw configurations of a short twin screw extruder. Flow parameters along of the TSE necessaries to apply the new dispersion model have been calculated with ©Ludovic software. Calcium carbonate filled polypropylene system was used as model compound. The agglomerate size distribution was evaluated from micrographs of polished samples at different locations along the extruder obtained by reflected light microscopy in conjunction with-semiautomatic image analysis.
© 2003, Carl Hanser Verlag, Munich
Articles in the same Issue
- Contents
- Contents
- Editorial
- Polymorphic and Crystal Structures from Crystallization in Polymer Processing
- Compounding/Screw Extrusion
- Flow Properties and Morphology of PC/LCP Blends Affected by the Addition of Glass Fiber and Resulted Mutual Influences
- Modeling Filler Dispersion along a Twin-Screw Extruder
- Characterisation of Finite Length Composites
- Single Screw Extrusion of Natural Fibre Reinforced Thermoplastics (NFRTP)
- Fiber and Film
- A New Method to Determine the Filament Force Tension within the Fibre Formation Zone
- Diameter Profile Measurements for CO2 Laser Heated Drawing Process of PET Fiber
- Stress Induced Crystallization in Elongational Flow
- Improved Spinnability of Metallocene Polyethylenes by Using Processing Aids
- Melt Spinning of Reactive Extruded and/or Blended Polymer Fibers by Means of an Online Coupled Twin Screw Extruder
- Cast Film Problem: A Non Isothermal Investigation
- Rotational Molding
- Effect of Processing History on the Sintering of Ethylene Copolymers
- Injection Molding
- Five Geometric Principles for Injection Molding
- Modelling of Residual Stresses and Warpage in Sandwich Injection Moulding
Articles in the same Issue
- Contents
- Contents
- Editorial
- Polymorphic and Crystal Structures from Crystallization in Polymer Processing
- Compounding/Screw Extrusion
- Flow Properties and Morphology of PC/LCP Blends Affected by the Addition of Glass Fiber and Resulted Mutual Influences
- Modeling Filler Dispersion along a Twin-Screw Extruder
- Characterisation of Finite Length Composites
- Single Screw Extrusion of Natural Fibre Reinforced Thermoplastics (NFRTP)
- Fiber and Film
- A New Method to Determine the Filament Force Tension within the Fibre Formation Zone
- Diameter Profile Measurements for CO2 Laser Heated Drawing Process of PET Fiber
- Stress Induced Crystallization in Elongational Flow
- Improved Spinnability of Metallocene Polyethylenes by Using Processing Aids
- Melt Spinning of Reactive Extruded and/or Blended Polymer Fibers by Means of an Online Coupled Twin Screw Extruder
- Cast Film Problem: A Non Isothermal Investigation
- Rotational Molding
- Effect of Processing History on the Sintering of Ethylene Copolymers
- Injection Molding
- Five Geometric Principles for Injection Molding
- Modelling of Residual Stresses and Warpage in Sandwich Injection Moulding
