Scaling-up a Reactive Extrusion Operation: A One-dimensional Simulation Analysis
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E. Ortiz-Rodriguez
Abstract
The peroxide-initiated degradation of polypropylene is simulated by means of a one-dimensional (1D) reactive extrusion (REX) model. Two scale-up rules, namely, constant thermal time and specific energy consumption (SEC) are evaluated for co-rotating intermeshing twin screw extruders (COITSEs) of various sizes. The weight-average molecular weight (Mw) and the polydispersity index (PDI) are selected as the evaluation parameters for testing the scale-up procedures being analyzed. The results for the simulated operating conditions show that when the REX operation is scaled-up under constant thermal time, very good agreement is obtained between the Mw and PDI of the larger extruders and the values of these parameters corresponding to the reference extruder. For the constant SEC approach, more significant variations are observed for both of the aforementioned parameters. In the case of the constant thermal time scale-up approach, the effect of operating conditions of the reference extruder on the scaled-up operation is further analyzed. For a constant screw speed, when the reference mass throughput increases the predicted time of extrusion increases. Regarding the temperature of reaction, the higher increase of this parameter corresponds, in general terms, to the lower mass throughputs and higher screw speeds specified for the reference extruder.
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© 2010, Carl Hanser Verlag, Munich
Articles in the same Issue
- Contents
- Contents
- Regular Contributed Articles
- Improvement in the Scratch Resistance of Polymers by Roller Burnishing Process
- Effect of Processing Conditions on the Dispersion of Vapor Grown Carbon Fiber in a Polyamide 6 and the Crystalline Structure of their Composites by Melt Compounding
- Dynamics of Filler Size and Spatial Distribution in a Plasticating Single Screw Extruder – Modeling and Experimental Observations
- Modification of Polyester Fibers by Bactericides Using Crazing Mechanism
- An Assessment of Erosion Wear Response of SiC Filled Epoxy Composites Reinforced with Glass and Bamboo Fibers
- A Global Model for Closely Intermeshing Counter-rotating Twin Screw Extruders with Flood Feeding
- Effects of Injection Molding Holding Pressure on the Replication of Surface Microfeatures
- Scaling-up a Reactive Extrusion Operation: A One-dimensional Simulation Analysis
- Modeling of Agglomerate Dispersion in Single Screw Extruders
- PPS-News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts
Articles in the same Issue
- Contents
- Contents
- Regular Contributed Articles
- Improvement in the Scratch Resistance of Polymers by Roller Burnishing Process
- Effect of Processing Conditions on the Dispersion of Vapor Grown Carbon Fiber in a Polyamide 6 and the Crystalline Structure of their Composites by Melt Compounding
- Dynamics of Filler Size and Spatial Distribution in a Plasticating Single Screw Extruder – Modeling and Experimental Observations
- Modification of Polyester Fibers by Bactericides Using Crazing Mechanism
- An Assessment of Erosion Wear Response of SiC Filled Epoxy Composites Reinforced with Glass and Bamboo Fibers
- A Global Model for Closely Intermeshing Counter-rotating Twin Screw Extruders with Flood Feeding
- Effects of Injection Molding Holding Pressure on the Replication of Surface Microfeatures
- Scaling-up a Reactive Extrusion Operation: A One-dimensional Simulation Analysis
- Modeling of Agglomerate Dispersion in Single Screw Extruders
- PPS-News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts