| Titre : |
Rheological characterization and thermal stability of different intrinsic viscosity poly(ethylene terephthalate) in air and nitrogen |
| Type de document : |
texte imprimé |
| Auteurs : |
S.-C. Chen, Auteur ; X.-M. Zhang, Auteur ; M. Liu, Auteur ; J.-P. Ma, Auteur ; W.-X. Lu, Auteur ; W.-X. Chen, Auteur |
| Année de publication : |
2016 |
| Article en page(s) : |
p. 292-300 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Analyse thermique
Caractérisation
Essais accélérés (technologie)
Groupement carboxyle
Matières plastiques -- Séchage
Poids moléculaires
Polyéthylène téréphtalate
Rhéologie
Stabilité thermique
Température
Viscosité
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
Four PET samples of different intrinsic viscosity values based on diverse manufacturing processes were characterized for their linear viscoelasticity using a parallel plate rheometer. Thermal stability and frequency sweep experiments were performed in the melt state at 270 °C. The influences of drying temperature, testing atmosphere (air or nitrogen), and preparation (granules vs. samples cut from compression molded sheets) were investigated. Results indicated that a higher drying temperature promoted complex viscosity significantly and compression molded sheets generated irreversible structural changes in harsh conditions. The samples measured in air decreased because of thermo-oxidation degradation, whereas that in nitrogen unexpectedly increased slightly because of polycondensation without surface renewal. The role of carboxyl end group towards PET thermal stability was found to be influenced by the atmosphere. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Intrinsic viscosity tests - Carboxyl end group analysis - Thermal analysis - Molecular weight characterization - Rheological measurements
- RESULTS AND DISCUSSION : Performance analysis of PETs - Effect of drying on rheology behavior - Testing atmosphere - Processing PETs into sheets - IV analysis of residual PETs - Thermal stability |
| DOI : |
10.3139/217.3138 |
| En ligne : |
https://drive.google.com/file/d/1vIbcKYjluJNrr003FVW-jzfU_SJyZ7pY/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26641 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXI, N° 3 (07/2016) . - p. 292-300
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