Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2023 Jul 27;6:158. doi: 10.1038/s42004-023-00949-8

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

PMC Copyright notice

Fig. 1 — Schematic illustration of concept and reaction scheme for PET depolymerization and crosslinking with glycerol before applications on mixed plastic systems. a Experimental scheme where (1) PET chain scission by glycerol in the presence of the catalytic amount of [EMIM] Cl, in NMP as a solvent, to form a dark red reaction mixture (i), to produce glycerol grafted polyol oligomers (ii) which are precipitated (iii) and isolated as Recovered PET (RPET). (2) Through the addition of zinc catalyst followed by heat treatment, crosslinked network (iv) is formed from RPET and can be processed into a film (v). b Scheme showing (1) Carbonyl exchange (transesterification) with glycerol degrades the bulk PET into branched oligomeric PET. (2) Catalytic addition of a Zn-containing species into RPET encourages glycerol insertion which contributes to the crosslinking of the material. c Mechanism for dynamic bond exchanges via further transesterification for processibility after crosslinking.