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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemistry
Organocatalytic depolymerization of poly(ethylene terephthalate)
Journal of Polymer Science, Part A: Polymer Chemistry, Volume 49, No. 5, Year 2011
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Description
We describe the organocatalytic depolymerization of poly(ethylene terephthalate) (PET), using a commercially available guanidine catalyst, 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD). Postconsumer PET beverage bottles were used and processed with 1.0 mol % (0.7 wt %) of TBD and excess amount of ethylene glycol (EG) at 190 °C for 3.5 hours under atmospheric pressure to give bis(2-hydroxyethyl) terephthalate (BHET) in 78% isolated yield. The catalyst efficiency was comparable to other metal acetate/alkoxide catalysts that are commonly used for depolymerization of PET. The BHET content in the glycolysis product was subject to the reagent loading. This catalyst influenced the rate of the depolymerization as well as the effective process temperature. We also demonstrated the recycling of the catalyst and the excess EG for more than 5 cycles. Computational and experimental studies showed that both TBD and EG activate PET through hydrogen bond formation/activation to facilitate this reaction. © 2011 Wiley Periodicals, Inc.
Authors & Co-Authors
Fukushima, Kazuki
United States, San Jose
Ibm Research - Almaden
Coulembier, Olivier
Belgium, Mons
Université de Mons
Lecuyer, Julien M.
United States, San Jose
Ibm Research - Almaden
Al-Megren, Hamid A.
South Africa
Petrochemicals Research Institute
Alabdulrahman, Abdullah M.S.
South Africa
Petrochemicals Research Institute
Alsewailem, Fares D.
South Africa
Petrochemicals Research Institute
McNeil, Melanie
United States, San Jose
San Jose State University
Dubois, Philippe H.
Belgium, Mons
Université de Mons
Waymouth, Robert M.
United States, Palo Alto
Stanford University
Horn, Hans W.
United States, San Jose
Ibm Research - Almaden
Rice, Julia E.
United States, San Jose
Ibm Research - Almaden
Hedrick, James L.
United States, San Jose
Ibm Research - Almaden
Statistics
Citations: 148
Authors: 12
Affiliations: 5
Identifiers
Doi:
10.1002/pola.24551
ISSN:
0887624X
e-ISSN:
10990518