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Investigation of the Interfacial Instabilities in the Coextrusion Flow of PE and PS
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R. Valette
Published/Copyright:
June 6, 2013
Abstract
The interface instability of the coextrusion flow of a polyethylene and a polystyrene is experimentally studied with industrial and laboratory equipments for various flow rates and temperature. Stable and unstable coextrusion conditions are identified as a function of flow rate ratio, shear rate and temperature. It is found that temperature and flow rate ratio are the most relevant parameters. Experimental results are then compared with stability analysis assuming White-Metzner constitutive equations. Agreement is fair at temperatures of 180°C and 200°C. However the longwave stability analysis is not sufficient to predict all experimental data.
Received: 2002-11-19
Accepted: 2003-1-20
Published Online: 2013-06-06
Published in Print: 2003-05-01
© 2003, Carl Hanser Verlag, Munich
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Articles in the same Issue
- Editorial
- Fourteenth in a Series: Heinz List and his Family of Continuous Mixing Machines
- Screw Extrusion
- Influence of Non-Newtonian Behaviour on the Processing Characteristics of Wall-slipping Materials
- Neural Network Approach to Density Control of Rigid PVC Foam in Extrusion Process
- Investigation of Melting Phenomena in Modular Co-rotating Twin Screw Extrusion
- Mixing and Compounding
- Montmorillonite Co-intercalated with Octadecylamine and Stearic Acid by Low Temperature Melting and its Influence on PP Nanocomposites
- Analysis and Optimization of Kenics Static Mixers
- Electret-thermal Analysis of Polymer Blends
- Effects of Zinc Fatty Acids on Improved Polymer Processing for Critical Extrusions
- Flexible Sheet Molding Compound (SMC) Using Aliphatic Polyester as Cross Linker
- Co-Extrusion
- Investigation of the Interfacial Instabilities in the Coextrusion Flow of PE and PS
- Film
- Radiant Heating of Plastics: Application to Film Blowing Processes
- Injection Molding
- Measurement and Prediction of Temperature Distribution in an Injection Molding Cavity
- A Study of Processing Conditions on the Properties of Diffraction Optical Elements by Injection/Compression Molding Process
- Flow Behavior of Sandwich Injection Molding in Sequential and Simultaneous Injection
- Rotational Molding
- Rotational Moulding and Powder Processing of Natural Fibre Reinforced Thermoplastics
