Upcycling of PET Waste by Incorporating a Malic Acid-Based Monomer for High Performance and Chemically Recyclable Copolyesters
Herein, a highly rigid monomer, 2-(2-hydroxyethyl)-1,3-dioxoisoindoline-5-carboxylic acid (HTI), was readily prepared from biosourced malic acid. A series of PET copolyesters were fabricated through an in situ chemical upcycling strategy, in which HTI units were inserted into the backbones of the PET waste via a depo...