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Studies of the Trans-Quinacridone Nucleation of Poly-(ethylene-b-propylene)

Dedicated to the memory of Prof. Morand Lambla
  • T. Sterzynski , M. Lambla , F. Georgi and M. Thomas
Published/Copyright: June 3, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 12 Issue 1

Abstract

The poly-(ethylene-b-propylene) was nucleated for a study of the structure modifications as well as the improvement of the mechanical properties, particularly the impact resistance. The nucleation was accomplished by two various red pigments: a linear trans-quinacridone dye (as ß-phase nucleator) and a dimethyl quinacridone resulting in the formation of a pure a-phase structure. Such procedure allowed the comparison of both the crystal structure and the morphology of the copolymer. For the ß-nucleated copolymer a maximum of the k-value (fraction of ß-phase) was found for a concentration of the nucleating agent of 5 × 10−4 wt.-%. By means of the WAXS measurements (in the transmission and reflection mode) an important structure gradient was detected in the cross-section of the injection moulded samples. This structure gradient was also observed by optical microscopy, where an agreement between optical observation of the spherulites and the k-value distribution on the cross-section of the samples was observed. For both nucleating agents (linear transquinacridone and dimethyl quinacridone) a dependence of the mechanical properties of the copolymer (modulus of elasticity and brittleness by impact resistance) on the pigment concentration was observed. For the ß-phase nucleated copolymer the maximum of the k-value of the hexagonal crystal structure corresponds to the highest ductility by impact test.

* Mail address: T. Sterzynski, ECPM Université Louis Pasteur, 4 rue Boussingault, 67000 Strasbourg, France
Received: 1995-11-22
Accepted: 1996-5-22
Published Online: 2013-06-03
Published in Print: 1997-03-01

© 1997, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Editorial
  5. Screw Extrusion
  6. Upgrading Recycled HDPE by Rheometer-Controlled Crosslinking
  7. Blend Morphology of Linear Low Density Polyethylene and Polystyrene in a Non-Intermeshing Twin Screw Extruder
  8. Mixing
  9. A Study on the Reactive Compatibilization of a PBT/LCP Blend: Catalyst Effect
  10. Influence of Processing Temperature on the Morphological and Mechanical Properties of a PC/TLCP Blend
  11. Fibers
  12. The Effect of Drawing and Annealing Conditions on the Structure and Properties of Bacterial Poly(3-hydroxybutyrate-co-3 hydroxyvalerate) Fibers
  13. Numerical Analysis of Cooling Air Systems in Film Blowing
  14. Moulding
  15. On the Simulation of Thermoplastic Injection Moulding Process
  16. Molding
  17. Rheology of Layered Thermoplastic Matrix Composites during Compression Molding
  18. Studies of the Trans-Quinacridone Nucleation of Poly-(ethylene-b-propylene)
  19. The Role of Long Molecules and Nucleating Agents in Shear Induced Crystallization of Isotactic Polypropylenes**
https://doi.org/10.3139/217.970064

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Editorial
  5. Screw Extrusion
  6. Upgrading Recycled HDPE by Rheometer-Controlled Crosslinking
  7. Blend Morphology of Linear Low Density Polyethylene and Polystyrene in a Non-Intermeshing Twin Screw Extruder
  8. Mixing
  9. A Study on the Reactive Compatibilization of a PBT/LCP Blend: Catalyst Effect
  10. Influence of Processing Temperature on the Morphological and Mechanical Properties of a PC/TLCP Blend
  11. Fibers
  12. The Effect of Drawing and Annealing Conditions on the Structure and Properties of Bacterial Poly(3-hydroxybutyrate-co-3 hydroxyvalerate) Fibers
  13. Numerical Analysis of Cooling Air Systems in Film Blowing
  14. Moulding
  15. On the Simulation of Thermoplastic Injection Moulding Process
  16. Molding
  17. Rheology of Layered Thermoplastic Matrix Composites during Compression Molding
  18. Studies of the Trans-Quinacridone Nucleation of Poly-(ethylene-b-propylene)
  19. The Role of Long Molecules and Nucleating Agents in Shear Induced Crystallization of Isotactic Polypropylenes**
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