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International Journal of Chemical Engineering
Volume 2017, Article ID 5361251, 10 pages
Research Article

Reactive Extrusion of Polyethylene Terephthalate Waste and Investigation of Its Thermal and Mechanical Properties after Treatment

1Department of Chemistry, University of Sharjah, P.O. Box 27272, Sharjah, UAE
2College of Science and Engineering, Hamad Bin Khalifa University, P.O. Box 34110, Doha, Qatar

Correspondence should be addressed to Mahmoud A. Mohsin;

Received 6 October 2017; Accepted 6 November 2017; Published 23 November 2017

Academic Editor: Jose C. Merchuk

Copyright © 2017 Mahmoud A. Mohsin 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.


This study investigates treating polyethylene terephthalate (PET) waste water bottles with different mass of ethylene glycol (EG) using reactive extrusion technique at a temperature of 260°C. The study puts emphases on evaluating the thermal, mechanical, and chemical characteristics of the treated polyethylene terephthalate. The properties of the treated PET from the extruder were analyzed using FT-IR, TGA, DSC, and nanoindentation. The melt flow indexes (MFI) of both treated and untreated PET were also measured and compared. Thermal properties such as melting temperature () for treating PET showed an inversely proportional behavior with the EG concentrations. The FT-IR analysis was used to investigate the formation of new linkages like hydrogen bonds between PET and EG due to the hydroxyl and carbonyl groups. Nanoindentation results revealed that both the mechanical characteristics, elastic modulus and hardness, decrease with increasing EG concentration. On the other hand, the melt flow index of treated PET exhibited an increase with increasing EG concentration in the PET matrix.