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Naphthalene-ring Containing Thermotropic Copolyester and its Blends with PET

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Published/Copyright: May 27, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 5 Issue 1

Abstract

A series of thermotropic liquid crystalline copolyesters based on p-acetoxybenzoic acid, 2,7-diacetoxynaphthalene, terephthalic acid and polyethylene 2,6-naphthalate were prepared via melt transesterification. Their thermotropic liquid crystalline behavior was studied by visual observation on the hot stage of a polarized light microscope. The dependence of the crystallizability and melting temperature of the copolyesters on the 2,7-diace-toxynaphthalene content was examined by x-ray diffraction and differential scanning calorimetry. A blend sample was prepared by physically mixing 40% thermotropic copolyester and 60% polyethylene terephthalate and the phase-separated charackter of the copolyester and PET in the blend was proved by TOT and dynamic mechanical measurements. The SEM micrographs of the as-spun fibers of the blend show separation of the two phases. The highly oriented macromolecules and the fibril alignment of the mesomorphic copolyester in the blend has also been revealed after the dissolution of the PET phase in a solvent.

* Mail address: Prof. Zhenglong Zhou, Dept. of Man-made Fibre Science and Engineering, China Textile University, 1882 West Yan-an Road, Shanghai, PRC.
Published Online: 2013-05-27
Published in Print: 1990-03-01

© 1990, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. The Synthesis of Polymer Processing Machines
  5. Non-isothermal Extrusion of Composite Materials
  6. Effect of Spinline Quenching on Structure Development in High-speed Melt Spinning of PET
  7. Structure Development in Melt Spinning and Drawing of Nylon-11 and Nylon-12 Fibers
  8. Incremental Drawing of Polyethylene-terephthalate Partially Oriented Yarn (PET-POY)**
  9. Naphthalene-ring Containing Thermotropic Copolyester and its Blends with PET
  10. Drawing Behavior of Solution Modified Polyethylene
  11. Rheological Properties and Morphological Structure of Blended and Filled Nylon-6
  12. Film Blowing of Thermotropic Liquid Crystalline Polymers
  13. Single and Double Bubble Tubular Film Extrusion of Polyethylene Terephthalate
https://doi.org/10.3139/217.900037

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. The Synthesis of Polymer Processing Machines
  5. Non-isothermal Extrusion of Composite Materials
  6. Effect of Spinline Quenching on Structure Development in High-speed Melt Spinning of PET
  7. Structure Development in Melt Spinning and Drawing of Nylon-11 and Nylon-12 Fibers
  8. Incremental Drawing of Polyethylene-terephthalate Partially Oriented Yarn (PET-POY)**
  9. Naphthalene-ring Containing Thermotropic Copolyester and its Blends with PET
  10. Drawing Behavior of Solution Modified Polyethylene
  11. Rheological Properties and Morphological Structure of Blended and Filled Nylon-6
  12. Film Blowing of Thermotropic Liquid Crystalline Polymers
  13. Single and Double Bubble Tubular Film Extrusion of Polyethylene Terephthalate
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