[article]
| Titre : |
Tensile and flexural properties of β-nucleated polypropylenes |
| Type de document : |
texte imprimé |
| Auteurs : |
M. Obadal, Auteur ; J. Simonik, Auteur ; K. Stoklasa, Auteur ; V. Habrovà , Auteur ; R. Cermak, Auteur |
| Année de publication : |
2004 |
| Article en page(s) : |
p. 308-312 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
668.9 Polymères |
| Résumé : |
Resuming our previous work on B-nucleated polypropylenes, namely on their impact strength, our present work directs attention towards a flexural and tensile behavior of B-nucleated polypropylenes (B-iPP). For the purposes of this work, commercially available isotactic polypropylene was modified using various amounts of a specific nucleating agent based on N, N’-dicyclohexylnaphtalene-2,6-dicarboxamide (NU100). From the prepared blends test specimens were prepared by injection molding. Structural characterization (crystallinity and the content of B-phase) was carried out by X-ray diffractometry. A multipurpose mechanical property tester was used for determination of tensile and flexural properties. It was found that B-phase content decreased both tensile and flexural strength; on the other hand, the presence of B-phase dramatically raised cold drawability of the injection-molded specimens; addition of 0.03 wt.% of NU100 in the injection-molded parts led to a more than 800% increase of the draw ratio of specimens tested at the testing speed of 100 mm/min. Furthermore, tensile testing carried out using various strain speeds (10 and 100 mm/ min) revealed that higher ductility of the material containing B-phase is particularly pronounced by faster deformation processes, such as fast drawing or impact load. |
| DOI : |
10.3139/217.1834 |
| En ligne : |
https://drive.google.com/file/d/11B2PIUR0ZFe6lSuTOar05m9xr9NFwUf1/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3115 |
in INTERNATIONAL POLYMER PROCESSING > Vol. XIX, N° 3 (09/2004) . - p. 308-312
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