Effects of nano α-Al2O3 fillers and dispersant on thermal and dynamic mechanical properties of polypropylene/nano α-Al2O3 composite

This article presents a comparative study on the effects of nano α-alumina on thermal degradation and dynamic mechanical properties of polypropylene (PP) nanocomposites. In this respect, two types of composites were prepared, with dispersant and without dispersant. Thermogravimetric analysis of both...

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Bibliographic Details
Published in:Journal of thermoplastic composite materials 2012-06, Vol.25 (4), p.453-467
Main Authors: Mirjalili, F, Chuah, L, Khalid, M, Hasmaliza, M
Format: Article
Language:English
Subjects:
Dispersants
Dynamic mechanical properties
Nanocomposites
Nanomaterials
Nanostructure
Polypropylenes
Reduction
Weight loss
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Summary:This article presents a comparative study on the effects of nano α-alumina on thermal degradation and dynamic mechanical properties of polypropylene (PP) nanocomposites. In this respect, two types of composites were prepared, with dispersant and without dispersant. Thermogravimetric analysis of both composites showed a drastic shift in the weight loss curve toward higher temperature, which led to reduction in the PP heat release rate in both composites. Differential scanning calorimetry results showed that the crystallinity of the nanocomposites was increased especially in the presence of dispersant. The storage modulus of the nanocomposites was found to be higher than that of pure PP, because nanofiller increased the stiffness of the nanocomposites. The glass transition temperatures of the nanocomposites were not significantly changed and damping factor of the nanocomposites was decreased.
ISSN:0892-7057
1530-7980
DOI:10.1177/0892705711421805