Devolatilization of Polymer Solutions
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L. Chen
Abstract
A simulator to emulate the working of a counter-rotating twin screw extruder was constructed for studying devolatilization (DV) of reactive polymer solutions. The rate of the release of the volatiles was measured by an in-line mass flow meter. The operating pressure and solution temperature were measured by a pressure transducer and a thermocouple. The vapor sample compositions were determined by UV spectrophotometer. The transesterification of ethylene-vinyl acetate copolymer with 3-phenyl 1-propanol in 1-nonane solution was chosen as a model reaction. The volumetric mass transfer coefficient K1A was determined at various temperatures, pressures, shaft speeds and sample sizes. The effect of the reaction on K1A was also examined. It was found that K1A of the solvent (1-nonane) increases significantly with a decrease in operating pressure, and that it also increases appreciably with shaft speed, whereas temperature and the initial sample size have little effect on it. The reaction shows undetectable effect on K1A of the inert solvent.
© 1994, Carl Hanser Verlag, Munich
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- Ninth in a Series: Mitsubishi Heavy Industries: Road to a High Technology Giant
- Internal Mixers
- Two-Dimensional Dynamic Study of the Distributive Mixing in an Internal Mixer
- Screw Extrusion
- Design of Tightly Intermeshing Co-Rotating Twin Screw Extruders
- Devolatilization of Polymer Solutions
- Flow Mechanisms, Material Distributions and Phase Morphology Development in a Modular Intermeshing Counter-Rotating Twin Screw Extruder of Leistritz Design
- 3-D Flow Simulations of a Cavity Transfer Mixer
- Die Extrusion
- Flow and Fiber Orientation Calculations in Reinforced Thermoplastic Extruded Tubes
- Fiber Spinning
- Orientation Evolution in Convergent-Divergent Dies
- Molding
- Unsteady Flow of Semi-Concentrated Fiber Suspensions in Compression Molding
- Equation of State for Pure Polymeric Fluids Theory Based on An Improved Hole and Cell Model
- Residual Stresses in Quenched and Injection Moulded Products
- Image Simulation and Evaluation of Fiber Orientation Distribution
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- Ninth in a Series: Mitsubishi Heavy Industries: Road to a High Technology Giant
- Internal Mixers
- Two-Dimensional Dynamic Study of the Distributive Mixing in an Internal Mixer
- Screw Extrusion
- Design of Tightly Intermeshing Co-Rotating Twin Screw Extruders
- Devolatilization of Polymer Solutions
- Flow Mechanisms, Material Distributions and Phase Morphology Development in a Modular Intermeshing Counter-Rotating Twin Screw Extruder of Leistritz Design
- 3-D Flow Simulations of a Cavity Transfer Mixer
- Die Extrusion
- Flow and Fiber Orientation Calculations in Reinforced Thermoplastic Extruded Tubes
- Fiber Spinning
- Orientation Evolution in Convergent-Divergent Dies
- Molding
- Unsteady Flow of Semi-Concentrated Fiber Suspensions in Compression Molding
- Equation of State for Pure Polymeric Fluids Theory Based on An Improved Hole and Cell Model
- Residual Stresses in Quenched and Injection Moulded Products
- Image Simulation and Evaluation of Fiber Orientation Distribution
