Estimation of the morphology development of immiscible liquid-liquid systems during single screw extrusion

A mathematical model to predict the evolution of the morphology of immiscible liquid–liquid systems in single screw extruders has been developed. The model computes the dimensions of the dispersed phase in the polymeric matrix, taking into account the stretching, break‐up, and coalescence phenomena....

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Bibliographic Details
Published in:Polymer engineering and science 2010-11, Vol.50 (11), p.2194-2204
Main Authors: Domingues, N., Gaspar-Cunha, A., Covas, J.A.
Format: Article
Language:English
Subjects:
Computer programs
Conveying
Dispersion
Evolution
Extrusion
Fluids
Liquids
Mathematical models
Melts
Methods
Morphology
Plastics
Prediction (Logic)
Single screw extruders
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Summary:A mathematical model to predict the evolution of the morphology of immiscible liquid–liquid systems in single screw extruders has been developed. The model computes the dimensions of the dispersed phase in the polymeric matrix, taking into account the stretching, break‐up, and coalescence phenomena. The corresponding routine was inserted in a process modeling software, describing the flow in a single screw extruder from hopper do die. The drop dimensions were computed along the melting and melt conveying zones. This enabled the study of the morphological evolution of a two‐phase liquid system in a single screw extruder, taking into consideration the effects of the material properties, operating conditions, and screw geometry. The limited experimental data obtained was generally in line with the theoretical predictions. POLYM. ENG. SCI., 2010. © 2010 Society of Plastics Engineers
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.21756