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Journal of Polymers and the Environment

, Volume 27, Issue 11, pp 2490–2508 | Cite as

Hopes Beyond PET Recycling: Environmentally Clean and Engineeringly Applicable

  • Ramin Shamsi
  • Gity Mir Mohamad SadeghiEmail author
  • Henri Vahabi
  • Javad Seyfi
  • Reza Sheibani
  • Payam Zarrintaj
  • Fouad Laoutid
  • Mohammad Reza SaebEmail author
Original paper
  • 47 Downloads

Abstract

Disposal of plastics in the environment has become a core of anxiety in developing countries, while in the developed countries the focus has additionally been placed on design and manufacture of emerging products from plastic wastes—a somewhat vague yet promising horizon. Central to environmental concerns are poly(ethylene terephthalate) (PET) wastes, mainly from post-consumer bottles. Because of a considerable drop in molecular weight in the course of recycling, recycled PETs are not suitable for engineering uses. An efficient yet reasonably green synthesis route is employed here to convert PET wastes into polyurethane, and then carbon nanotubes (CNTs) was added at different levels to obtain nanocomposites with high mechanical properties. The effects of isocyanate (NCO)/hydroxyl (OH) molar ratio and CNTs content on the morphology, physical and mechanical properties were discussed. Chemical/physical crosslink density was calculated from initial slope of stress–strain curves, Mooney–Rivlin plots, strain-hardening modulus, rubbery-plateau storage modulus and swelling data. High tensile strength (300 MPa) and breaking elongation (160%) of polyurethane/CNTs nanocomposites born from PET wastes seemed promising. Microscopic analyses by AFM, SEM, and TEM gave useful information about distribution of CNTs in polyurethane. Lastly, structural changes were correlated to mechanical properties improvement.

Keywords

Nanocomposites PET waste Polyurethane CNTs Recycling 

Notes

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Polymer Engineering and Color TechnologyAmirkabir University of TechnologyTehranIran
  2. 2.Research & Development CenterMarun Petrochemical CompanyMahshahrIran
  3. 3.Université de Lorraine, Centrale Supélec, LMOPSMetzFrance
  4. 4.Laboratoire Matériaux Optiques, Photoniques et Systèmes, Centrale SupélecUniversité Paris-SaclayMetzFrance
  5. 5.Department of Chemical EngineeringAzad University, Shahrood BranchShahroodIran
  6. 6.Polymer Engineering Department, Faculty of EngineeringUrmia UniversityUrmiaIran
  7. 7.Color and Polymer Research Center (CPRC)Amirkabir University of TechnologyTehranIran
  8. 8.Advanced Materials GroupIranian Color Society (ICS)TehranIran
  9. 9.Center of Innovation and Research in Materials & Polymers (CIRMAP), Laboratory of Polymeric and Composite Materials (LPCM)University of Mons UMONS & Materia Nova Research CenterMonsBelgium
  10. 10.Department of Resin and AdditivesInstitute for Color Science and TechnologyTehranIran

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