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International Journal of Polymer Science
Volume 2015 (2015), Article ID 451691, 9 pages
http://dx.doi.org/10.1155/2015/451691
Research Article

Effects of MAPP Compatibilization and Acetylation Treatment Followed by Hydrothermal Aging on Polypropylene Alfa Fiber Composites

1Laboratoire des Matériaux Polymères Avancés (LMPA), Faculté de Technologie, Université Abderrahmane Mira, 06000 Bejaia, Algeria
2INRA, UMR614 Fractionnement des AgroRessources et Environnement, 51100 Reims, France
3Université de Reims Champagne-Ardenne, UMR614 Fractionnement des AgroRessources et Environnement, 51100 Reims, France
4INRA, UR1268 Biopolymères Interactions Assemblages, rue de la Geraudiere, 44316 Nantes, France

Received 8 January 2015; Revised 28 March 2015; Accepted 29 March 2015

Academic Editor: Saiful Islam

Copyright © 2015 Noura Hamour et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This work investigates the effect of hydrothermal aging on the properties of polypropylene/alfa fiber composites. Hydrothermal aging was induced in an environmental testing chamber at 65°C and 75% relative humidity (RH) over a 1000 h period. At the beginning ( h), the results showed that Young’s moduli of the untreated alfa fibers and the acetylation-treated fibers increased by 21% and 36%, respectively, compared with the virgin polypropylene (PP). Additionally, Young’s moduli decreased by 7% for the compatibilized composites composed of maleic anhydride grafted polypropylene (MAPP). After 1000 h of aging, Young’s moduli decreased by 36% for untreated alfa fibers and 29% for the acetylation-treated alfa fibers and the compatibilized composites. Significant degradation was observed in the untreated alfa fiber samples. The Fourier transformed infrared (FTIR) allows us to distinguish the characteristic absorption bands of the main chemical functions present in the composite material before and after aging. The thermal properties showed that the thermal stability and the degree of crystallinity of the composites decreased after hydrothermal aging; this result was corroborated by the dynamical mechanical analysis (DMA) results.