[article]
| Titre : |
Thermal properties and morphology characteristics of a PP mono-filament and its foam |
| Type de document : |
texte imprimé |
| Auteurs : |
N. Chuapon, Auteur ; O. Naithamon, Auteur ; Y. Sato, Auteur ; S. Areerat, Auteur ; Hiroshi Ito, Auteur |
| Année de publication : |
2014 |
| Article en page(s) : |
p. 579-587 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Matières plastiques -- Propriétés thermiques
Monofilaments
Morphologie (matériaux)
Mousses plastiques
Polypropylène
Structure cristalline (solide)
|
| Index. décimale : |
668.9 Polymères |
| Résumé : |
The polypropylene (PP) mono-filament is an alternative material that can be used for insulation, packaging, and polymer composite applications. In this study, PP mono-filaments were prepared by extrusion free-fall at temperatures of 190, 200, and 210°C through a micro extrusion die with a diameter of 900??m. The free-fall speeds of the filament were controlled by a gear pump driving at speeds ranging from 12.5 to 20.0?min?1, and the extrudates were cooled at room temperature. The PP mono-filaments were subsequently foamed by a batch foaming process with sc-CO2 as the blowing agent at foaming temperatures of 165, 170, 175 and 180°C. The thermal properties and crystallinity of the prepared filaments and their foams were investigated using a DSC. The foam morphology and isotropic foam properties were characterized by SEM micrographs. The results show that the various morphologies of the PP mono-filament foams deviated from the isotropic foam behavior and had isotropic foam index values in the range of 1.1 to 2.3. In addition, the PP mono-filament that was foamed at 175°C expanded in the longitudinal direction and exhibited the highest expansion ratio, but its degree of crystallinity decreased compared to the mono-filaments. PP mono-filament foam represented a narrow crystallization temperature range and crystallization time than mono-filament and tended to a faster crystalline growth. |
| DOI : |
10.3139/217.2920 |
| En ligne : |
https://drive.google.com/file/d/1457bKcafdihSgQ13yCVwGTbw2fqkDFjh/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22223 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XXIX, N° 5 (11/2014) . - p. 579-587
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Thermal properties and morphology characteristics of a PP mono-filament and its foam in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 5 (11/2014)
