| Title |
A Multitool for Circular Economy: Fast Ring-Opening Polymerization and Chemical Recycling of (Bio)polyesters Using a Single Aliphatic Guanidine Carboxy Zinc Catalyst |
| ID_Doc |
22788 |
| Authors |
Fuchs, M; Schäfer, PM; Wagner, W; Krumm, I; Walbeck, M; Dietrich, R; Hoffmann, A; Herres-Pawlis, S |
| Title |
A Multitool for Circular Economy: Fast Ring-Opening Polymerization and Chemical Recycling of (Bio)polyesters Using a Single Aliphatic Guanidine Carboxy Zinc Catalyst |
| Year |
2023 |
| Published |
Chemsuschem, 16.0, 12 |
| DOI |
10.1002/cssc.202300192 |
| Abstract |
A new aliphatic hybrid guanidine N,O-donor ligand (TMGeech) and its zinc chloride complex ([ZnCl2(TMGeech)]) are presented. This complex displays high catalytic activity for the ringopening polymerization (ROP) of lactide in toluene, exceeding the toxic industry standard tin octanoate by a factor of 10. The high catalytic activity of [ZnCl2(TMGeech)] is further demonstrated under industrially preferred melt conditions, reaching high lactide conversions within seconds. To bridge the gap towards a sustainable circular (bio)economy, the catalytic activity of [ZnCl2(TMGeech)] for the chemical recycling of polylactide (PLA) by alcoholysis in THF is investigated. Fast production of different value-added lactates at mild temperatures is demonstrated. Selective PLA degradation from mixtures with polyethylene terephthalate (PET) and a polymer blend, catalyst recycling, and a detailed kinetic analysis are presented. For the first time, chemical recycling of post-consumer PET producing different value-added materials is demonstrated using a guanidine-based zinc catalyst. Therefore, [ZnCl2(TMGeech)] is a promising, highly active multitool, not only to implement a circular (bio)plastics economy, but also to tackle today's ongoing plastics pollution. |
| Author Keywords |
chemical recycling; alcoholysis; polylactide; polyethylene terephthalate; ring-opening polymerization |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000999351600001 |
| WoS Category |
Chemistry, Multidisciplinary; Green & Sustainable Science & Technology |
| Research Area |
Chemistry; Science & Technology - Other Topics |
| PDF |
https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/cssc.202300192
|