| Titre : |
Fracture toughness of PP/EPDM/nano-ternary composites : the role of distribution of inorganic particles |
| Type de document : |
texte imprimé |
| Auteurs : |
L. Gong, Auteur ; S.-H. Chen, Auteur ; W.-M. Hou, Auteur ; B. Yin, Auteur ; L.-P. Li, Auteur ; M.-B. Yang, Auteur |
| Année de publication : |
2016 |
| Article en page(s) : |
p. 224-232 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Alliages polymères -- propriétés mécaniques
Angle de contact
Carbonate de calciumLe 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.
Dioxyde de silicium
Ethylène-propylène-diène monomère
Nanoparticules
Polypropylène
Résistance au chocs
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
The influence of the distribution of the inorganic particles on the toughness of the PP/EPDM/nano-ternary composites was investigated. Four morphologies for PP/EPDM/nano-ternary composites were obtained by means of adjusting the surface tension of inorganic particles (nano-CaCO3, hydrophobic nano-SiO2 and hydrophilic nano-SiO2) and the compounding sequence (one-step extrusion and two-step extrusion). Morphological observation revealed that the segregated dispersion morphology was formed in the PP/EPDM/CaCO3 composite. For the PP/EPDM/R974 (hydrophobic nano-SiO2) composite, R974 particles were dispersed at the interface between the PP matrix and EPDM dispersed phase. A200 particles (hydrophilic nano-SiO2) continuously dispersed between PP and EPDM phase for PP/EPDM/A200 composites prepared by one-step, while were present in EPDM dispersed phase for the two-step PP/EPDM/A200 composites. The dependence of the toughness on the phase morphology of the components, especially the distribution of nanoparticles, was studied systematically. The impact strength of one-step PP/EPDM/A200 composites was pronouncedly enhanced, increasing 552 % compared to pure PP. Compared with the other three composites, the one-step PP/EPDM/A200 composites exhibits better effect of preventing crack propagation and far higher fracture energies. It is attributed to the A200 particles continuously dispersed between EPDM phase and matrix, which makes EPDM particles have better compatibility with the PP matrix and the overlapping of the stress field with A200 particles. |
| Note de contenu : |
- EXPERIMENTAL SECTION : Materials - Sample preparation - Scanning electron microscopy (SEM) - Izod impact strength testing - Contact angle measurement - Analysis of the damage zone around the surviving crack tip - Fracture toughness measurements
- RESULTS AND DISCUSSION : The control of morphology for PP/EPDM/nanoternary composites - Izod impact strength - Investigation of the fracture and toughening mechanisms - The role of nano-particles distribution on the impact toughness |
| DOI : |
10.3139/217.3174 |
| En ligne : |
https://drive.google.com/file/d/1wEchFcOOTuehwoS7fLqtGW5HFvEKG_-v/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26180 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXI, N° 2 (05/2016) . - p. 224-232
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Fracture toughness of PP/EPDM/nano-ternary composites : the role of distribution of inorganic particles in INTERNATIONAL POLYMER PROCESSING, Vol. XXXI, N° 2 (05/2016)
