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Miscibility and Mechanical Properties of Poly(ether imide)/Liquid Crystalline Poly(ester imide) Blends

  • Changyeol Ryu , Yongsok Seo , Seung Sang Hwang , Soon Man Hong , Tae Suk Park and Kwang Ung Kim
Published/Copyright: May 27, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 9 Issue 3

Abstract

As a part of continuous study to search for the high performance in situ composite, this study examines the miscibility of liquid crystalline poly(ester imide) (PEsI) with poly(ether imide) (PEI) and its effect on the mechanical properties and the morphology of the blends of these polymers. Liquid crystalline polymers (LCPs) were synthesized from trimellitic anhydride and α,ω-diaminoalkane with 8, 10, 12 methylene groups. Thermal condensation of these diacids with 4,4′-diacetoxybiphenyl yielded the corresponding imides of thermotropic homopolyesters. Optical polarized micrographs show that the synthesized poly(ester imides) have the smectic structure. Partial miscibility was observed from the shift of the glass transition temperature determined by differential scanning calorimetry. Increasing concentration of the liquid crystalline PEsI in the PEI/PEsI blends shifted the glass transition temperature of the PEI phase to a lower temperature. Mechanical properties of the PEI/PEsI blends were changed with the number of methylene units in PEsI. Morphologies of the partially miscible system were found to be quite different from those of an immiscible system. Strong adhesion between the matrix (PEI) and dispersed phase (LCP) was observed, but fine fibril formation was not possible due to the absence of smectic-nematic transition.

* Present and Mail address: Dr. Yongsok Seo, Department of Chemistry, 1101 University Avenue, University of Wisconsin, Madison, WI 53706, U.S.A.
Received: 1993-10-21
Accepted: 1993-12-3
Published Online: 2013-05-27
Published in Print: 1994-09-01

© 1994, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Tenth in a Series: Fried. Krupp: Pioneer Integrated Steel and Processing Machinery Manufacturer. Part 1. Essen, Magdeburg and Harburg (1812–1960)
  5. Internal Mixers
  6. Finite Element Modelling of Non-isothermal Viscometric Flows in Rubber Mixing
  7. Screw Extrusion and Mixing
  8. The Optimisation of Masterbatch Formulations for Use in Single Screw Machines
  9. Morphological Changes of a Polymer Blend into a Twin-Screw Extruder
  10. An In-line Melt Rheometer for Molten Plastics
  11. Selecting Continuous Compounding Equipment Based on Process Considerations
  12. Reactive Processing
  13. Peroxide Induced and Thermal Degradation of Polypropylene
  14. Reactive Blending of Polyamide 6 and Polycarbonate
  15. Modification of Polypropylene by Maleic Anhydride
  16. Fibers and Films
  17. Melt Strength Behaviour of Polypropylenes
  18. Molding
  19. Multilayer Injection Moulding
  20. Miscibility and Mechanical Properties of Poly(ether imide)/Liquid Crystalline Poly(ester imide) Blends
  21. The Effects of Recycling and Degradation on Parison Extrusion
  22. Modeling and Simulation of High Reynolds' Number Flows During Reaction Injection Mold Filling
https://doi.org/10.3139/217.940266

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Tenth in a Series: Fried. Krupp: Pioneer Integrated Steel and Processing Machinery Manufacturer. Part 1. Essen, Magdeburg and Harburg (1812–1960)
  5. Internal Mixers
  6. Finite Element Modelling of Non-isothermal Viscometric Flows in Rubber Mixing
  7. Screw Extrusion and Mixing
  8. The Optimisation of Masterbatch Formulations for Use in Single Screw Machines
  9. Morphological Changes of a Polymer Blend into a Twin-Screw Extruder
  10. An In-line Melt Rheometer for Molten Plastics
  11. Selecting Continuous Compounding Equipment Based on Process Considerations
  12. Reactive Processing
  13. Peroxide Induced and Thermal Degradation of Polypropylene
  14. Reactive Blending of Polyamide 6 and Polycarbonate
  15. Modification of Polypropylene by Maleic Anhydride
  16. Fibers and Films
  17. Melt Strength Behaviour of Polypropylenes
  18. Molding
  19. Multilayer Injection Moulding
  20. Miscibility and Mechanical Properties of Poly(ether imide)/Liquid Crystalline Poly(ester imide) Blends
  21. The Effects of Recycling and Degradation on Parison Extrusion
  22. Modeling and Simulation of High Reynolds' Number Flows During Reaction Injection Mold Filling
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