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Devolatilization of Polymer Solutions

  • L. Chen , G. H. Hu and J. T. Lindt
Published/Copyright: May 27, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 9 Issue 1

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.

* Mail address: Prof. Dr. J. T. Lindt, University of Pittsburgh, Dept. of Materials Science & Engineering, Pittsburgh, U.S.A.
Received: 1993-1-2
Accepted: 1993-6-4
Published Online: 2013-05-27
Published in Print: 1994-03-01

© 1994, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Ninth in a Series: Mitsubishi Heavy Industries: Road to a High Technology Giant
  5. Internal Mixers
  6. Two-Dimensional Dynamic Study of the Distributive Mixing in an Internal Mixer
  7. Screw Extrusion
  8. Design of Tightly Intermeshing Co-Rotating Twin Screw Extruders
  9. Devolatilization of Polymer Solutions
  10. Flow Mechanisms, Material Distributions and Phase Morphology Development in a Modular Intermeshing Counter-Rotating Twin Screw Extruder of Leistritz Design
  11. 3-D Flow Simulations of a Cavity Transfer Mixer
  12. Die Extrusion
  13. Flow and Fiber Orientation Calculations in Reinforced Thermoplastic Extruded Tubes
  14. Fiber Spinning
  15. Orientation Evolution in Convergent-Divergent Dies
  16. Molding
  17. Unsteady Flow of Semi-Concentrated Fiber Suspensions in Compression Molding
  18. Equation of State for Pure Polymeric Fluids Theory Based on An Improved Hole and Cell Model
  19. Residual Stresses in Quenched and Injection Moulded Products
  20. Image Simulation and Evaluation of Fiber Orientation Distribution
https://doi.org/10.3139/217.940026

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Ninth in a Series: Mitsubishi Heavy Industries: Road to a High Technology Giant
  5. Internal Mixers
  6. Two-Dimensional Dynamic Study of the Distributive Mixing in an Internal Mixer
  7. Screw Extrusion
  8. Design of Tightly Intermeshing Co-Rotating Twin Screw Extruders
  9. Devolatilization of Polymer Solutions
  10. Flow Mechanisms, Material Distributions and Phase Morphology Development in a Modular Intermeshing Counter-Rotating Twin Screw Extruder of Leistritz Design
  11. 3-D Flow Simulations of a Cavity Transfer Mixer
  12. Die Extrusion
  13. Flow and Fiber Orientation Calculations in Reinforced Thermoplastic Extruded Tubes
  14. Fiber Spinning
  15. Orientation Evolution in Convergent-Divergent Dies
  16. Molding
  17. Unsteady Flow of Semi-Concentrated Fiber Suspensions in Compression Molding
  18. Equation of State for Pure Polymeric Fluids Theory Based on An Improved Hole and Cell Model
  19. Residual Stresses in Quenched and Injection Moulded Products
  20. Image Simulation and Evaluation of Fiber Orientation Distribution
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