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Modeling of Non-isothermal Film Blowing with Integral Constitutive Equations

  • S. M. Alaie and T. C. Papanastasiou
Published/Copyright: May 27, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 8 Issue 1

Abstract

Non-isothermal, melt film-blowing is analysed by means of a nonlinear integral constitutive equation that incorporates shear history effects, spectrum of relaxation times, shear thinning and extension thinning or thickening. The temperature history, as predicted by the simultaneously solved energy equation, is introduced into the constitutive equation by means of the appropriate shift factor incorporated in the linear modulus of the constitutive equation. The resulting system of integrodifferential equations is solved by finite element discretization and Newton iteration. Bubble shape, velocity, temperature, stress and thickness profiles are predicted simultaneously. Predicted film thickness, temperature and stress profiles of blowing of polystyrene are compared with experimental data taken from the literature.

* Mail address: Prof. Dr. T. C. Papanastasiou, Chemical Process Engineering Research Institute, P.O. Box 1517, University City, 54006, Thessaloniki, Greece.
Received: 1992-1-24
Accepted: 1992-6-19
Published Online: 2013-05-27
Published in Print: 1993-03-01

© 1993, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Invited Paper
  4. The Challenges of Waste Toward the 21st Century
  5. Internal Mixers
  6. Simulation of 3-Dimensional Flow in Internal Mixers
  7. Die Extrusion
  8. Effect of Surface Coatings on Wall Slip of LLDPE
  9. Effects of Interfacial Conditions on Wall Slip and Sharkskin Melt Fracture of HDPE
  10. Reactive Processing
  11. Maleation of Polypropylene Melt in Model Reactors
  12. Film
  13. Modeling of Non-isothermal Film Blowing with Integral Constitutive Equations
  14. Non-isothermal Crystallization of a Polymer Film on Chilling Rolls
  15. Molding
  16. A Process to Produce Microcellular PVC
  17. Orientation Development of Mixed Anisotropic Particles in Compounds
https://doi.org/10.3139/217.930051

Articles in the same Issue

  1. Contents
  2. Contents
  3. Invited Paper
  4. The Challenges of Waste Toward the 21st Century
  5. Internal Mixers
  6. Simulation of 3-Dimensional Flow in Internal Mixers
  7. Die Extrusion
  8. Effect of Surface Coatings on Wall Slip of LLDPE
  9. Effects of Interfacial Conditions on Wall Slip and Sharkskin Melt Fracture of HDPE
  10. Reactive Processing
  11. Maleation of Polypropylene Melt in Model Reactors
  12. Film
  13. Modeling of Non-isothermal Film Blowing with Integral Constitutive Equations
  14. Non-isothermal Crystallization of a Polymer Film on Chilling Rolls
  15. Molding
  16. A Process to Produce Microcellular PVC
  17. Orientation Development of Mixed Anisotropic Particles in Compounds
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