Table of Contents
Journal of Polymers
Volume 2014 (2014), Article ID 426470, 9 pages
http://dx.doi.org/10.1155/2014/426470
Research Article

Thermal Stability and Kinetic Study of Isotactic Polypropylene/Algerian Bentonite Nanocomposites Prepared via Melt Blending

Laboratoire des Matériaux Polymères, Département de Chimie Macromoléculaire, Faculté de Chimie, Université des Sciences et de la Technologie Houari Boumediene, BP 32, El Alia, 16111 Alger, Algeria

Received 16 February 2014; Revised 18 March 2014; Accepted 18 March 2014; Published 16 April 2014

Academic Editor: Yves Grohens

Copyright © 2014 Fayçal Benhacine 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

Isotactic polypropylene (iPP)/bentonite nanocomposites were prepared via melt blending using bentonite clay originated from Maghnia (Algeria). This clay was, at a first stage, used in its pure form (PBT) and then organically modified by Hexadecyl ammonium chloride (OBT). The effect of Maghnia bentonite dispersion on the iPP matrix was investigated by X-ray diffraction (XRD) and transmission electronic microscopy (TEM). DSC results evidenced that unmodified or organomodified bentonite can act as a nucleating agent increasing the rate of crystallites formation. Moreover, a thermogravimetry analysis confirmed a significant enhanced thermal stability of IPP/clay nanocomposites compared to pure IPP. The Flynn-Wall-Ozawa and Tang methods were applied to determine the activation energy of the degradation process. The apparent activation energy   of thermal degradation for IPP/clay nanocomposites was much higher than that of virgin iPP. Comparatively to PBT, results indicate that OBT has an important effect on pure iPP thermal stability. Tensile modulus, tensile strength, and elongation at break were also measured and compared with those of pure iPP.