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Orientation and Mechanical Property Development in the Melt Spinning of Fibers from Polyetherimide and Polyarylate

  • S. S. Song , M. Cakmak and J. L. White
Published/Copyright: May 27, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 6 Issue 4

Abstract

An experimental study of structure development in melt spinning polyetherimide (PEI) and polyarylate (PAR) is presented. PEI was melt spun at 320° and 350°C and PAR at 310° and 340°C to drawdown ratios of up to 1 000. The melt spun fibers were found to be totally amorphous but to have significant levels of birefringence which increased with draw-down ratio. The birefringence was found to vary linearly with the spinline stress for both polymers and the data was independent of the melt spinning temperature. The proportionality constants are interpretable as equivalent to stress optical constants for the corresponding melts and have values of 9 400 Brewsters for the PEI and 7 400 Brewsters for the polyarylate. The mechanical properties of the melt spun fibers were determined in uniaxial extension. It was found that Young's modulus and tensile strength increased with spinline stress or birefringence while elongation to break decreased. The mechanical properties were found to be similar to polyether ether ketone, poly-p-phenylene sulfide, and polyethylene terephthalate in similar correlations, but as compared to polypropylene at the same spinline stress had higher Young's modulus and tensile strength but lower elongation to break. We were not able to successfully draw these materials over a hot plate at temperatures above their glass transition temperature.

* Mail address: Prof. Dr. J. L. White, Institute of Polymer Engineering, University of Akron, Akron, Ohio 44325-0301, U.S.A.
Received: 1989-8-8
Accepted: 1989-11-10
Published Online: 2013-05-27
Published in Print: 1991-12-01

© 1991, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Review Paper
  4. Existing Scale-up Rules for Single-screw Plasticating Extruders
  5. Internal Mixers
  6. Scale-up Effect in Internal Mixers
  7. Mixing and Extrusion of High Silica and all Silica-natural Rubber Compounds
  8. Screw Extrusion
  9. An Analytical Model of Partial and Thorough Melting in Single-screw Extruders
  10. Dimensionless Non-Newtonian Isothermal Simulation and Scale-up Considerations for Modular Intermeshing Corotating Twin Screw Extruders
  11. Erratum
  12. Die Extrusion
  13. Extrusion of Rubber Compounds and Highly Filled Thermoplastics through Coathanger Dies
  14. Pressure Oscillations during Capillary Extrusion of High Density Polyethylene
  15. Frequency Analysis of Pressure Fluctuations in a Single Screw Extruder
  16. Fibers and Films
  17. Orientation and Mechanical Property Development in the Melt Spinning of Fibers from Polyetherimide and Polyarylate
  18. Study on the Formation of β-Crystalline from Isotactic Polypropylene Fiber
  19. Biaxially-oriented Polyethylene Films by Compression of Injected Moldings
  20. Modelling of the Cooling of Semi-crystalline Polymers during their Processing
  21. Molding
  22. Non-isothermal Mold Filling and Curing Simulation in Thin Cavities with Preplaced Fiber Mats
  23. Predicting the Skin-Core Boundary Location in Injection Moldings
https://doi.org/10.3139/217.910332

Articles in the same Issue

  1. Contents
  2. Contents
  3. Review Paper
  4. Existing Scale-up Rules for Single-screw Plasticating Extruders
  5. Internal Mixers
  6. Scale-up Effect in Internal Mixers
  7. Mixing and Extrusion of High Silica and all Silica-natural Rubber Compounds
  8. Screw Extrusion
  9. An Analytical Model of Partial and Thorough Melting in Single-screw Extruders
  10. Dimensionless Non-Newtonian Isothermal Simulation and Scale-up Considerations for Modular Intermeshing Corotating Twin Screw Extruders
  11. Erratum
  12. Die Extrusion
  13. Extrusion of Rubber Compounds and Highly Filled Thermoplastics through Coathanger Dies
  14. Pressure Oscillations during Capillary Extrusion of High Density Polyethylene
  15. Frequency Analysis of Pressure Fluctuations in a Single Screw Extruder
  16. Fibers and Films
  17. Orientation and Mechanical Property Development in the Melt Spinning of Fibers from Polyetherimide and Polyarylate
  18. Study on the Formation of β-Crystalline from Isotactic Polypropylene Fiber
  19. Biaxially-oriented Polyethylene Films by Compression of Injected Moldings
  20. Modelling of the Cooling of Semi-crystalline Polymers during their Processing
  21. Molding
  22. Non-isothermal Mold Filling and Curing Simulation in Thin Cavities with Preplaced Fiber Mats
  23. Predicting the Skin-Core Boundary Location in Injection Moldings
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