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LDPE/HDPE/clay nanocomposites: Effects of compatibilizer on the structure and dielectric response

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Zazoum, B., David, Éric et Ngô, Anh Dung. 2013. « LDPE/HDPE/clay nanocomposites: Effects of compatibilizer on the structure and dielectric response ». Journal of Nanotechnology, vol. 2013.
Compte des citations dans Scopus : 9.

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Abstract

PE/clay nanocomposites were prepared by mixing a commercially available premixed polyethylene/O-MMT masterbatch into a polyethylene blend matrix containing 80 wt% low-density polyethylene and 20 wt% high-density polyethylene with and without anhydride modified polyethylene (PE-MA) as the compatibilizer using a corotating twin-screw extruder. In this study, the effect of nanoclay and compatibilizer on the structure and dielectric response of PE/clay nanocomposites has been investigated. The microstructure of PE/clay nanocomposites was characterized using wide-angle X-ray diffraction (WAXD) and a scanning electron microscope (SEM). Thermal properties were examined using differential scanning calorimetry (DSC). The dielectric response of neat PE was compared with that of PE/clay nanocomposite with and without the compatibilizer. The XRD and SEM results showed that the PE/O-MMT nanocomposite with the PE-MA compatibilizer was better dispersed. In the nanocomposite materials, two relaxation modes are detected in the dielectric losses. The first relaxation is due to a Maxwell-Wagner-Sillars interfacial polarization, and the second relaxation can be related to dipolar polarization. A relationship between the degree of dispersion and the relaxation rate fmax of Maxwell-Wagner-Sillars was found and discussed.

Item Type: Peer reviewed article published in a journal
Professor:
Professor
David, Éric
Ngô, Anh Dung
Affiliation: Génie mécanique
Date Deposited: 12 Dec 2013 20:09
Last Modified: 15 Mar 2019 14:57
URI: http://espace2.etsmtl.ca/id/eprint/6322

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