Experimental Investigation and Theoretical Prediction of Extrudate Swell Using Conformational Rheological Models
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Abstract
In this study the extrudate swell of polymer solutions is estimated using the microstructure of polymer molecules. When a flexible polymer chain goes through a narrow die shear stress exerting on the chain will cause the polymer chain to be stretched along the flow direction. After emerging from die all external stresses vanish immediately and the chains tend to recover their previous state due to elastic recovery. This phenomenon will results in a gradual increase in extrudate diameter and this is used as the key idea for estimating swell ratio. A Giesekus based conformational model was used in order to predict polymer chains microstructure everywhere in the domain. The resulting PDE set including, continuity, momentum, and conformational rheological model were solved using a finite volume method with the OpenFOAM software. Numerical results were compared with experimental data which were obtained for aqueous solutions of Carboxymethylcellulose. It was found that model predictions are in good agreement with experimental data. The results were also compared to results which were obtained by the Tanner relation which underestimates experimental data.
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Articles in the same Issue
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Articles in the same Issue
- Contents
- Contents
- Regular Contributed Articles
- LLDPE/Proton Exchanged Layered Niobate K4Nb6O17 Nanocomposites
- Experimental Flow Visualization and Residence Time Distributions in a Co-Kneader
- Mechanochemical Milling of PP/Ground Tire Rubber Blends in Solid-State
- Development of Polymer Extrusion Extruder for Evaluating with a Small Amount of Polymeric Material
- A 3D Simulation Analysis of Reactive Flow in Screw Elements of Closely Intermeshing Twin Screw Extruders
- Morphology and Mechanical Properties of Compatibilized Bio-sourced PA/Plasticized Starch Grafted PP Ternary Polymer Blends
- Preparation and Characterization of Polyurethane/Polysulfide Miscible Blend Nanocomposites
- Modelling the Solids Throughput of Single Screw Smooth Barrel Extruders as a Function of the Feed Section Parameters
- Experimental Investigation and Theoretical Prediction of Extrudate Swell Using Conformational Rheological Models
- Controllable Self-organization of Polyphenylene Oxide Honeycomb Microstructure
- An Investigation on Usage of Sodium Borohydride and Zinc Oxide as Oxygen Scavengers in Polyethylene Terephthalate Films
- PPS-News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts