| Titre : |
Single and double bubble tubular film extrusion of polybutylene terephthalate |
| Type de document : |
texte imprimé |
| Auteurs : |
K. Song, Auteur ; J. L. White, Auteur |
| Année de publication : |
2000 |
| Article en page(s) : |
p. 157-165 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
668.9 Polymères |
| Résumé : |
An experimental study of film formation and structure development of polybutylene terephthalate (PBT) in single and double bubble tubular film extrusion processes is presented. PBT was found largely stable in the first stage. In the second stage, the bubble was unstable and biaxial inflation was achieved only with a blow-up ratio of one. The sources of second bubble instabilities were related to the crystalline nature of the first bubble being inflated in the second stage. The structure and properties in the films varied substantially with processing conditions. While the first bubble had poorly ordered α-structure, the double bubble possessed oriented polymorphic texture. The second deformation that induced high film-line stress favored the formation of a stable β phase. The mechanical behavior of the films reflected the crystal perfection as well as orientation in the films. |
| Note de contenu : |
- EXPERIMENTAL : Materials and film formation - Wide angle X-ray diffraction - Differential scanning calorimeter - Refractive index - Tensile test
- RESULTS : Tubular film extrusion process - WAXS flat film photographs - WAXS diffractometer scans - Differential scanning calorimetry - WAXS pole figures - Refractive indices - Mechanical properties
- DISCUSSION : Stability of tubular film extrusion - Structural character as a function of processing - Crystalling melting behavior and crystallinity - Crystalline orientation - Optical behavior - Mechanical behavior |
| DOI : |
10.3139/217.1581 |
| En ligne : |
https://drive.google.com/file/d/1mVSh-IHGjy8_O7-uZTKtUNQLpIW97ONk/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16054 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XV, N° 2 (06/2000) . - p. 157-165
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Single and double bubble tubular film extrusion of polybutylene terephthalate in INTERNATIONAL POLYMER PROCESSING, Vol. XV, N° 2 (06/2000)
