Depolymerization of poly(ethylene terephthalate) recycled from post‐consumer soft‐drink bottles

Document Type

Article

Publication Date

1-1-1989

Abstract

Poly(ethylene terephthalate), recycled from post‐consumer soft‐drink bottles, is depolymerized by glycolysis in excess ethylene glycol at 190°C in the presence of a metal acetate catalyst. The glycolyzed products consist mostly of the PET monomer, bis(hydroxyethyl) terephthalate, and the dimer, and after long reaction time (up to and longer than 8 h), an equilibrium is attained between these two species. No other higher PET oligomers were detected in the study. Of the four metal acetates (lead, zinc, cobalt, and manganese) tested, zinc acetate is the best in terms of the extent of depolymerization, that is, the relative amount of monomer formed. The presence of green pigment in one type of recycled PET apparently has no effects on the glycolysis reaction. Copyright © 1989 John Wiley & Sons, Inc.

Identifier

0024657150 (Scopus)

Publication Title

Journal of Polymer Science Part A Polymer Chemistry

External Full Text Location

https://doi.org/10.1002/pola.1989.080270625

e-ISSN

10990518

ISSN

0887624X

First Page

2071

Last Page

2082

Issue

6

Volume

27

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