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Stress Optical Behavior and Structure Development in Melt Spun PEEK/PEI Blends

  • R. Ozisik and M. Cakmak
Published/Copyright: June 18, 2018
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International Polymer Processing
From the journal International Polymer Processing Volume 33 Issue 3

Abstract

Stress optical behavior as influenced by blend composition has been investigated by on–line stress monitoring during melt spinning of a series of melt miscible PEEK/PEI blends. At low stresses/draw downratios, the fibers are found to be amorphous. In this range, the linear stress optical rule is obeyed and stress optical constant was found to be composition dependent. Beyond a critical drawdown, the PEEK chains first form very highly oriented ordered domains that exhibit significant translational disorder along the fiber axis. In the processing range observed, this structure persists even at high spinline deformation/stresses. While the stress optical behavior remains linear for those compositions where no stress crystallization was detected, negative deviation from initial linearity was observed when these ordered PEEK regions began to be observed indicating that birefringence saturation is approached while stresses are increased.

*Correspondence address, Mail address: Miko Cakmak, Schools of Materials and Mechanical Engineering, Purdue University, 1205 W. State St. West Lafayette, IN 47907, USA, E-mail:

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Received: 2018-01-15
Accepted: 2018-03-26
Published Online: 2018-06-18
Published in Print: 2018-07-29

© 2018, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Editorial
  5. Special Issue Contributions
  6. Preparation of Poly(l-lactic acid) Scaffolds by Thermally Induced Phase Separation: Role of Thermal History
  7. Modification of Syndiotactic Polypropylene with Nano-Calcium Carbonate and Halloysite
  8. Enhancement of Heat Seal Properties of Polypropylene Films by Elastomer Incorporation
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  11. Morphology in Multilayer Blown Films of Polypropylene and Ethylene-Octene Copolymer Blends
  12. A Criterion for the Formation of Fibrillar Layers in Injection Molded Parts
  13. Abnormal Behaviors in the Capillary Rheometry of Plastisol Formulations
  14. The Effect of Cellulose Nanocrystals (CNC) on Isothermal Crystallization Kinetics of LLDPE and HDPE
  15. A Rheological Investigation of the Crystallization Kinetics of Syndiotactic Polypropylene of Varying Degree of Tacticity
  16. Effect of Mutual Interaction between High and Low Stereo-Regularity Components on Structure Formation in Melt Spinning Process of Isotactic Polypropylene Blend Fibers
  17. Analysis of the No-Flow Criterion Based on Accurate Crystallization Data for the Simulation of Injection Molding of Semi-Crystalline Thermoplastics
  18. Interfacial Tension Properties in Biopolymer Blends: From Deformed Drop Retraction Method (DDRM) to Shear and Elongation Rheology-Application to Blown Film Extrusion
  19. Stress Optical Behavior and Structure Development in Melt Spun PEEK/PEI Blends
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  22. Seikei Kakou Abstracts
  23. Seikei-Kakou Abstracts
https://doi.org/10.3139/217.3655

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Editorial
  5. Special Issue Contributions
  6. Preparation of Poly(l-lactic acid) Scaffolds by Thermally Induced Phase Separation: Role of Thermal History
  7. Modification of Syndiotactic Polypropylene with Nano-Calcium Carbonate and Halloysite
  8. Enhancement of Heat Seal Properties of Polypropylene Films by Elastomer Incorporation
  9. Flow-Induced Crystallization of Polyamide-6
  10. PLA Crystallization Kinetics and Morphology Development
  11. Morphology in Multilayer Blown Films of Polypropylene and Ethylene-Octene Copolymer Blends
  12. A Criterion for the Formation of Fibrillar Layers in Injection Molded Parts
  13. Abnormal Behaviors in the Capillary Rheometry of Plastisol Formulations
  14. The Effect of Cellulose Nanocrystals (CNC) on Isothermal Crystallization Kinetics of LLDPE and HDPE
  15. A Rheological Investigation of the Crystallization Kinetics of Syndiotactic Polypropylene of Varying Degree of Tacticity
  16. Effect of Mutual Interaction between High and Low Stereo-Regularity Components on Structure Formation in Melt Spinning Process of Isotactic Polypropylene Blend Fibers
  17. Analysis of the No-Flow Criterion Based on Accurate Crystallization Data for the Simulation of Injection Molding of Semi-Crystalline Thermoplastics
  18. Interfacial Tension Properties in Biopolymer Blends: From Deformed Drop Retraction Method (DDRM) to Shear and Elongation Rheology-Application to Blown Film Extrusion
  19. Stress Optical Behavior and Structure Development in Melt Spun PEEK/PEI Blends
  20. PPS News
  21. PPS News
  22. Seikei Kakou Abstracts
  23. Seikei-Kakou Abstracts
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