| Titre : |
Devulcanization of scrap tire rubber with supercritical CO2 : A study of the effects of process parameters on the properties of devulcanized rubber |
| Type de document : |
texte imprimé |
| Auteurs : |
M. Meysami, Auteur ; C. Tzoganakis, Auteur ; P. Mutyala, Auteur ; S. H. Zhu, Auteur ; M. Bulsari, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 183–193 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Caoutchouc -- Propriétés mécaniques
Dévulcanisation
Elastomères -- Extrusion
Fluides supercritiques
Rhéologie
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
A continuous extrusion devulcanization process has been developed by using supercritical CO2. Experiments have been carried out on an industrial scale twin screw extruder to study the effects of processing conditions on the properties of devulcanized rubber. Using a fractional factorial design in three levels, the effects of process temperature, screw speed, and feed rate on the sol fraction, degree of devulcanization, Mooney viscosity, and tensile properties of devulcanized rubber have been investigated. The significance of the effects of the processing conditions decreases in the following order: flow rate, screw speed, and process temperature. Similar trends are noted for different responses with the exception of tensile properties. The observed relationship between the sol fraction and the degree of crosslinking in the rubber samples before and after devulcanization points to a highly selective disruption of the sulfur crosslinks in the rubber network during devulcanization rather than a random network scission. Mooney viscosity has been found to be in excellent agreement with the network structure properties, sol fraction, and degree of devulcanization.
|
| Note de contenu : |
- EXPERIMENTAL : Materials and equipment - Experimental design - Characterization techniques
- RESULTS AND DISCUSSION : Network analysis - Mooney viscosity and curing characteristics - Tensile properties |
| DOI : |
10.3139/217.3290 |
| En ligne : |
https://drive.google.com/file/d/1PxINeCjfqgt2gDJMtBm0w9pHzAt4h37a/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28497 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXII, N° 2 (05/2017) . - p. 183–193
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