| Titre : |
Stress optical behavior and structure development in melt spun PEEK/PEI blends |
| Type de document : |
texte imprimé |
| Auteurs : |
R. Ozisik, Auteur ; Miko Cakmak, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 425-434 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Biréfringence La biréfringence est la propriété physique d'un matériau dans lequel la lumière se propage de façon anisotrope. Dans un milieu biréfringent, l'indice de réfraction n'est pas unique, il dépend de la direction de polarisation de l'onde lumineuse. (Wikipedia)
Calorimétrie
Diffraction des rayons X Ã grand angle
Extrusion filage
Fibres textiles -- Propriétés mécaniques
Fibres textiles synthétiques
Mélanges de fibres
Microscopie
Polyéther éther cétone
Polyéther imide
Production
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
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. |
| Note de contenu : |
- MATERIALS AND EXPERIMENTAL METHODS : Blend preparation - Fiber production - Differential scanning calorimeter - Optical microscopy - Wide angle X-ray scattering - Mechanical properties
- RESULTS : Thermal properties - Evolution of structure - Birefringence and spinline stress - Wide angle X-ray scattering - Mechanical properties
- DISCUSSION : Birefringence and orientation - Wide angle X-ray scattering - Mechanical properties |
| DOI : |
10.3139/217.3655 |
| En ligne : |
https://drive.google.com/file/d/1Oqe8o049fhHqXyqPaCMluiTlOQLt1PZ9/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30811 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXIII, N° 3 (07/2018) . - p. 425-434
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