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Licensed Unlicensed Requires Authentication Published by De Gruyter June 19, 2013

Dissolution/reprecipitation technique for waste polyolefin recycling using new pure and blend organic solvents

  • Arkan J. Hadi EMAIL logo , Ghazi Faisal Najmuldeen and Kamal Bin Yusoh


Restoration of waste polymer based on low-density polyethylene (LDPE), high-density polyethylene (HDPE) and polypropylene (PP) is studied using the dissolution/reprecipitation method. In this technique, pure turpentine, turpentine/petroleum ether (PetE) and turpentine/benzene as solvents with different fractions and PetE and n-hexane as non-solvents were examined. Commercial polymer products (packaging food, bags, laboratory plastic materials, detergent containers) used as raw materials were optimized with model polymers. Polymer recoveries in every case were <94%. Fourier transform infrared (FTIR) spectra and tensile mechanical properties of the samples before and after recycling were measured. Potential recycling-based degradation of the polymer was further investigated by measuring the thermal properties (melting point and crystallinity), before and after recycling, using differential scanning calorimetry (DSC). The blend solvents were seen as good solvents for all polyolefins used and the dissolution temperature was less than the pure solvent at the same time. High reconditioning was observed in most recycled samples, with no significant difference from the virgin materials. The studied technique seems to be viable for waste polyolefin polymer recycling.

Corresponding author: Arkan J. Hadi, Faculty of Chemical and Natural Resources Engineering, Universiti Malaysia Pahang, Lebuhraya Tun Razak, 26300 Gambang, Kuantan, Pahang, Malaysia; and Department of Chemical Engineering, College of Engineering, University of Tikrit, Tikrit, Salahaldden, Iraq

The authors acknowledge the support provided by Dr. Kamal Bin Yusoh and the Faculty of Chemical Engineering and Natural Resource (FKKSA), University Malaysia Pahang, for this work.


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Received: 2013-2-5
Accepted: 2013-5-16
Published Online: 2013-06-19
Published in Print: 2013-08-01

©2013 by Walter de Gruyter Berlin Boston

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