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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemistry
Unexpected efficiency of cyclic amidine catalysts in depolymerizing poly(ethylene terephthalate)
Journal of Polymer Science, Part A: Polymer Chemistry, Volume 51, No. 7, Year 2013
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Description
This article describes studies on the catalytic activity of several nitrogen-based organic catalysts for the depolymerization of poly(ethylene terephthalate) (PET), in which a few cyclic amidines work more effectively than a potent, bifunctional guanidine-based catalyst 1,5,7-triazabicyclo-[4,4,0]-dec- 5-ene (TBD) in the presence of short chain diols that play a role in activation of carbonyl groups through hydrogen bonding. Further studies prove that the catalytic efficiency at the above specific conditions depends only on the extent of activation of a hydroxyl group rather than simply the pKa of the bases. For glycolysis with excess short-chain alkanediols, 1,8-diazabicyclo[5.4. 0]undec-7-ene is the best catalyst. In contrast, TBD shows outstanding catalytic activity in depolymerizations of PET with mono-alcohols and longer-chain diols. Copyright © 2013 Wiley Periodicals, Inc.
Authors & Co-Authors
Fukushima, Kazuki
United States, San Jose
Ibm Research - Almaden
Japan, Yamagata
Yamagata University
Coady, Daniel J.
United States, San Jose
Ibm Research - Almaden
Jones, Gavin O.
United States, San Jose
Ibm Research - Almaden
Al-Megren, Hamid A.
Saudi Arabia, Riyadh
King Abdulaziz City for Science and Technology
Alabdulrahman, Abdullah M.S.
Saudi Arabia, Riyadh
King Abdulaziz City for Science and Technology
Alsewailem, Fares D.
Saudi Arabia, Riyadh
King Abdulaziz City for Science and Technology
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: 51
Authors: 9
Affiliations: 3
Identifiers
Doi:
10.1002/pola.26530
ISSN:
0887624X
e-ISSN:
10990518