[article]
| Titre : |
Study on creep behavior of PP/CaCO3 molded by vibration injection molding at different vibration frequency and vibration pressure |
| Type de document : |
texte imprimé |
| Auteurs : |
Y. Lu, Auteur ; H. Peng, Auteur ; K. Shen, Auteur ; Z. Yan, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
p. 136-142 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Carbonate de calcium Le carbonate de calcium (CaCO3) est composé d'un ion carbonate (CO32-) et d'un ion calcium (Ca2+), sa masse molaire est de 100,1 g/mole.
C'est le composant principal du calcaire et de la craie, mais également du marbre. C'est aussi le principal constituant des coquilles d'animaux marins, du corail et des escargots.
Composites -- Fluage
Contraintes (mécanique)
Matières plastiques -- Moulage par injection
Polypropylène
Rupture (mécanique)
Vibrations (mécanique)
|
| Index. décimale : |
668.9 Polymères |
| Résumé : |
Vibration injection molding technology has achieved some good properties, such as high impact strength and high tensile strength. Although many researchers have proved that the short-time mechanical properties of the polymer could be improved by vibration-injection molding technology, the longtime mechanical properties, such as the creep behavior, have not been paid enough attention. In this paper, the creep behavior of the calcium carbonate filled polypropylene (PP/CaCO3) prepared at various vibration conditions has been observed. The influences of the vibration pressure and the frequency on the mechanical properties and creep behavior were investigated via creep test and tensile test. Firstly, the tensile fracture strain reached the maximum (11%) at 0.72 Hz. Moreover, with the increasing vibration pressure amplitude, the tensile fracture strain would decrease. The changing tendency of tensile strength is basically contrary with the change of the tensile fracture strain. Secondly, when the vibration frequency reaches the 0.72 Hz, the tensile creep is larger than that of other frequencies samples at 50 MPa; meanwhile, the tensile creep of these PP/CaCO3parts, which has been prepared at 0.48 Hz, decreases with the increasing vibration pressure amplitude. Finally, the dynamic mechanics analysis (DMA) and the wide-angle X-ray diffraction (WAXD) were adopted to analyze the reason of the creep behavior change. The different macromolecular chains mobility caused the different creep behavior. |
| DOI : |
10.3139/217.2379 |
| En ligne : |
https://drive.google.com/file/d/1IqN-eJeH2DbVsQzRmNS9b2WiOBglMjxx/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11514 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XXVI, N° 2 (05/2011) . - p. 136-142
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