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Journal of Nanomaterials
Volume 2015, Article ID 382610, 10 pages
http://dx.doi.org/10.1155/2015/382610
Research Article

Oxygen Barrier Properties and Melt Crystallization Behavior of Poly(ethylene terephthalate)/Graphene Oxide Nanocomposites

1Institute of Physics, West Pomeranian University of Technology, Piastow Avenue 19, 70310 Szczecin, Poland
2Institute of Materials Science and Engineering, West Pomeranian University of Technology, Piastow Avenue 19, 70310 Szczecin, Poland
3Center of Bioimmobilisation and Innovative Packaging Materials, Faculty of Food Sciences and Fisheries, West Pomeranian University of Technology, Klemensa Janickiego Street 35, 71270 Szczecin, Poland
4Polymer Institute, Slovak Academy of Sciences, Dúbravská Cesta 9, 845 41 Bratislava 45, Slovakia

Received 9 February 2015; Revised 18 May 2015; Accepted 24 May 2015

Academic Editor: Mircea Chipara

Copyright © 2015 Anna Szymczyk 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

Poly(ethylene terephthalate) nanocomposites with low loading (0.1–0.5 wt%) of graphene oxide (GO) have been prepared by using in situ polymerization method. TEM study of nanocomposites morphology has shown uniform distribution of highly exfoliated graphene oxide nanoplatelets in PET matrix. Investigations of oxygen permeability of amorphous films of nanocomposites showed that the nanocomposites had better oxygen barrier properties than the neat PET. The improvement of oxygen permeability for PET nanocomposite films over the neat PET is approximately factors of 2–3.3. DSC study on the nonisothermal crystallization behaviors proves that GO acts as a nucleating agent to accelerate the crystallization of PET matrix. The evolution of the lamellar nanostructure of nanocomposite and neat PET was monitored by SAXS during nonisothermal crystallization from the melt. It was found that unfilled PET and nanocomposite with the highest concentration of GO (0.5 wt%) showed almost similar values of the long period ( nm for neat PET and  nm for PET/0.5GO).