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Devolatilization with Chemical Reaction in Polymer Solutions

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Published/Copyright: May 28, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 11 Issue 3

Abstract

It has been observed previously [1] that under the specific conditions prevailing in a reflux flask reactor, the overall rate of the transesterification reaction between an ethylene and vinyl acetate copolymer and 3-phenyl 1-propanol can be enhanced appreciably by the introduction of boiling inert hydrocarbon solvents. In the present study, the same reaction carried out under a controlled removal of vapors in a simulator emulating a non-intermeshing counter-rotating devolatilization twin screw extruder, a significant acceleration of the reaction rate has also been observed. In agreement with the previous work [1], the intrinsic reaction mechanism and the chemical equilibrium do not appear to be affected by boiling of the inert hydrocarbon solvents, nor does the additional mechanical agitation due to the rapid bubble growth contribute to the increase of the overall reaction rate. Theoretical analysis of the results confirms that the acceleration of the reaction rate originates from the localized mass transfer effect connected to the presence of the bubble vapor-liquid interface films induced by devolatilization.

* Mail address: Prof. J. Th. Lindt, Department of Materials Science and Engineering, University of Pittsburgh, 848 Benedum Hall, Pittsburgh, PA 15261, U.S.A.
Received: 1993-12-1
Accepted: 1995-11-3
Published Online: 2013-05-28
Published in Print: 1996-09-01

© 1996, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Nineteenth in a Series: US Rubber/Uniroyal Tire Company: Extrusion Innovators
  5. Screw Extrusion
  6. Frame Indifference: Fluid Flow in Single Screw Pumps and Extruders
  7. Modelling of a Viscous Non-Newtonian Polymer Melt in a List/Buss Kneader and Comparison to Experiment
  8. Analytical Study on Flow and Distributive Mixing of a New Type Pin Mixing Section for Screw Extruder
  9. Reactive Processing
  10. Devolatilization with Chemical Reaction in Polymer Solutions
  11. Film
  12. Morphology and Oxygen Barrier Properties of LDPE/EVOH Blends
  13. Molding
  14. Development of a Computer Simulation of SCORIM
  15. The Effect of Injection Molding Conditions on the Mechanical Properties of an In Situ Composite
  16. Structures and Properties of Injection Moldings of β-Crystal Nucleator-Added Polypropylenes
  17. Microstructure Evolution During Moulding of Particulate-Reinforced Thermoplastic Composites
  18. Defects in Resin Transfer Molded Plaques Due to Resin Age Distribution During Mold Filling
https://doi.org/10.3139/217.960228

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Nineteenth in a Series: US Rubber/Uniroyal Tire Company: Extrusion Innovators
  5. Screw Extrusion
  6. Frame Indifference: Fluid Flow in Single Screw Pumps and Extruders
  7. Modelling of a Viscous Non-Newtonian Polymer Melt in a List/Buss Kneader and Comparison to Experiment
  8. Analytical Study on Flow and Distributive Mixing of a New Type Pin Mixing Section for Screw Extruder
  9. Reactive Processing
  10. Devolatilization with Chemical Reaction in Polymer Solutions
  11. Film
  12. Morphology and Oxygen Barrier Properties of LDPE/EVOH Blends
  13. Molding
  14. Development of a Computer Simulation of SCORIM
  15. The Effect of Injection Molding Conditions on the Mechanical Properties of an In Situ Composite
  16. Structures and Properties of Injection Moldings of β-Crystal Nucleator-Added Polypropylenes
  17. Microstructure Evolution During Moulding of Particulate-Reinforced Thermoplastic Composites
  18. Defects in Resin Transfer Molded Plaques Due to Resin Age Distribution During Mold Filling
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