Effects of Process Conditions on the Dissolution of Carbon Dioxide in PS in Foaming Extruders
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Q. Zhang
Abstract
The effects of the main processing conditions on the dissolution behavior of CO2 in polystyrene melt were studied using a novel in-line method in connection with both single and twin-screw foaming extruders. Apparent solubility data obtained from the twin-screw extrusion experiments showed better consistency compared with those obtained from the single screw experiments, indicating the importance of enhanced mixing in affecting the gas dissolution and solubility behavior during an extrusion foaming process. Gas dissolution inside a twin-screw foaming extruder was further studied for CO2 in the polystyrene melt. The measured gas up-take was compared with the values calculated assuming equilibrium conditions in the gas injection zone in an effort to elucidate possible mechanisms for gas dissolution inside a foaming extruder during the actual foaming process.
© 2001, Carl Hanser Verlag, Munich
Articles in the same Issue
- Editorial
- Tenth of a Series: Pioneer of The Polymer Thermoset Industry – Leo-Hendrik Baekeiand
- Screw Extrusion
- Effects of Process Conditions on the Dissolution of Carbon Dioxide in PS in Foaming Extruders
- The Design of Extrusion Screws: An Optimization Approach
- Generalized Flow of Ellis Fluid in the Screw Channel
- Generalized Flow of Ellis Fluid in the Screw Channel
- Experimental Study of Melting in an Intermeshing Counter-Rotating Twin Screw Extruder
- Reactive Extrusion
- A Dynamic Model for Multiple Steady States in Reactive Extrusion
- Fiber and Film
- PA612 Double Bubble Tubular Film Process – Processability and Structure Development
- Injection Molding
- Injection Molding Technology for High Speed Optical Disk
- Three-dimensional Filling and Post-filling Simulation of Polymer Injection Molding
- Cold Rolling
- Microstructure and Prediction of Stress-strain Behaviour of Cold-rolled PP Sheets
Articles in the same Issue
- Editorial
- Tenth of a Series: Pioneer of The Polymer Thermoset Industry – Leo-Hendrik Baekeiand
- Screw Extrusion
- Effects of Process Conditions on the Dissolution of Carbon Dioxide in PS in Foaming Extruders
- The Design of Extrusion Screws: An Optimization Approach
- Generalized Flow of Ellis Fluid in the Screw Channel
- Generalized Flow of Ellis Fluid in the Screw Channel
- Experimental Study of Melting in an Intermeshing Counter-Rotating Twin Screw Extruder
- Reactive Extrusion
- A Dynamic Model for Multiple Steady States in Reactive Extrusion
- Fiber and Film
- PA612 Double Bubble Tubular Film Process – Processability and Structure Development
- Injection Molding
- Injection Molding Technology for High Speed Optical Disk
- Three-dimensional Filling and Post-filling Simulation of Polymer Injection Molding
- Cold Rolling
- Microstructure and Prediction of Stress-strain Behaviour of Cold-rolled PP Sheets
