Get access

Glycolysis of polyethylene terephthalate waste fibers

Authors

  • S. R. Shukla,

    Corresponding author
    1. Department of Fibers and Textile Processing Technology, Institute of Chemical Technology, University of Mumbai, Matunga, Mumbai 400 019, India
    • Department of Fibers and Textile Processing Technology, Institute of Chemical Technology, University of Mumbai, Matunga, Mumbai 400 019, India
    Search for more papers by this author
  • Ajay M. Harad

    1. Department of Fibers and Textile Processing Technology, Institute of Chemical Technology, University of Mumbai, Matunga, Mumbai 400 019, India
    Search for more papers by this author

Abstract

Glycolysis of polyethylene terephthalate waste fibers was carried out using excess ethylene glycol in the presence of different simple chemicals, namely, glacial acetic acid, lithium hydroxide, sodium sulfate, and potassium sulfate. Good yields (> 60%) of the monomer bis(2-hydroxyethylene terephthalate) were obtained using these chemicals as depolymerization catalysts. The purified monomer was characterized by elemental analysis, melting point, IR spectroscopy, and nuclear magnetic resonance. The qualitative and quantitative yields of the monomer obtained using these catalysts are most comparable with the conventionally used heavy metal catalysts such as zinc acetate and lead acetate. The chemicals used, being cheap and comparatively less harmful to the environment, offer further advantages in chemical recycling of polyester waste fibers. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 513–517, 2005

Ancillary