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Orientation and Mechanical Properties of Extrusion Cast PA 12 Films in Biaxial Stretching Process

  • S. Rhee and J. L. White
Published/Copyright: March 1, 2022
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International Polymer Processing
From the journal International Polymer Processing Volume 16 Issue 4

Abstract

The levels in biaxial orientations and mechanical properties of stretched extrusion cast polyamide 12 films were investigated with birefringence, wide angle X-ray diffraction (WAXD) pole figure and mechanical testing. Introduction of a pseudo-orthogonal crystalline symmetry enabled the calculation of White-Spruiell biaxial orientation factors using WAXD pole figure data. The orientation was uniaxial or biaxial depending on the stretch ratios along two principal stretching directions that are the machine direction (MD) and the transverse direction (TD). According to the WAXD pole figure patterns, planar alignments of hydrogen bonded layers were formed with respect to the film surface from most of the stretched films. Balanced stretching at higher stretch ratios enhanced the planarity. It was found that the mechanical properties (tensile strength and elongation at break) of the films had a close correlation with the out-of-plane birefringences.

* Mail address: J. L. White, Inst. of Polymer Engineering, University of Akron, Akron, Ohio 44325 0301, USA

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Received: 2001-05-08
Accepted: 2001-11-19
Published Online: 2022-03-01
Published in Print: 2022-03-01

© 2001 Walter de Gruyter GmbH, Berlin/Boston, Germany

Articles in the same Issue

  1. Contents
  2. Editorial
  3. Pioneer of Regenerated Cellulose and Reactive Processing Charles Frederick Cross
  4. Mixing and Screw Extrusion
  5. Characterization of Distributive Mixing in Polymer Processing Equipment using Renyi Entropies
  6. Investigation of Flow Rate and Viscous Dissipation in a Single Screw Pump-Extruder
  7. Direct Method for Deconvoluting Two Residence Time Distribution Curves
  8. Process Behavior of Special Mixing Elements in Twin-screw Extruders
  9. Experimental and Theoretical Study of Polymer Melting in a Co-rotating Twin Screw Extruder
  10. Experimental and Theoretical Study on the Performance of an Extruder for Cross-linkable PE
  11. Laminar Fluid Chaotic Mixing in Three-Dimensional Continuous Flow Domains
  12. Film
  13. Morphological Characterization of PE Blown Films by Atomic Force Microscopy
  14. Orientation and Mechanical Properties of Extrusion Cast PA 12 Films in Biaxial Stretching Process
  15. Injection Molding
  16. Simulation Opportunities by a Three-dimensional Calculation of Injection Moulding based on the Finite Element Method
  17. Flow Marks in Injection Molding of PP
  18. Injection Molding of Plastic Plates Combined with Boss Features on Superplastic Zn–22Al Sheet
  19. PPS News
  20. PPS News/Calendar of Future PPS Meetings
  21. Join in PPS-18
  22. Join in PPS-18
  23. Professional News
  24. Professional News
https://doi.org/10.1515/ipp-2001-0010

Articles in the same Issue

  1. Contents
  2. Editorial
  3. Pioneer of Regenerated Cellulose and Reactive Processing Charles Frederick Cross
  4. Mixing and Screw Extrusion
  5. Characterization of Distributive Mixing in Polymer Processing Equipment using Renyi Entropies
  6. Investigation of Flow Rate and Viscous Dissipation in a Single Screw Pump-Extruder
  7. Direct Method for Deconvoluting Two Residence Time Distribution Curves
  8. Process Behavior of Special Mixing Elements in Twin-screw Extruders
  9. Experimental and Theoretical Study of Polymer Melting in a Co-rotating Twin Screw Extruder
  10. Experimental and Theoretical Study on the Performance of an Extruder for Cross-linkable PE
  11. Laminar Fluid Chaotic Mixing in Three-Dimensional Continuous Flow Domains
  12. Film
  13. Morphological Characterization of PE Blown Films by Atomic Force Microscopy
  14. Orientation and Mechanical Properties of Extrusion Cast PA 12 Films in Biaxial Stretching Process
  15. Injection Molding
  16. Simulation Opportunities by a Three-dimensional Calculation of Injection Moulding based on the Finite Element Method
  17. Flow Marks in Injection Molding of PP
  18. Injection Molding of Plastic Plates Combined with Boss Features on Superplastic Zn–22Al Sheet
  19. PPS News
  20. PPS News/Calendar of Future PPS Meetings
  21. Join in PPS-18
  22. Join in PPS-18
  23. Professional News
  24. Professional News
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