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Unger, Christoph ; Heber, Christian ; Schmalz, Holger ; Bauer, Christof ; Kretschmer, Winfried ; Kempe, Rhett:
A Multiply and Long-Chain Branched Polyolefin with Low Density Polyethylene (LDPE)-Like Properties Containing Two Types of Functional Groups.
In: Angewandte Chemie International Edition.
Bd. 64
(2025)
Heft 51
.
- e202518150.
ISSN 1521-3773
DOI: https://doi.org/10.1002/anie.202518150
Volltext
Angaben zu Projekten
| Projekttitel: |
Offizieller Projekttitel Projekt-ID Die selektive Reaktion von α-Olefinen mit zwei Ethylenmolekülen 518769132 SFB 1357: MIKROPLASTIK – Gesetzmäßigkeiten der Bildung, des Transports, des physikalisch-chemischen Verhaltens sowie der biologischen Effekte: Von Modell- zu komplexen Systemen als Grundlage neuer Lösungsansätze 391977956 Open Access Publizieren Ohne Angabe |
|---|---|
| Projektfinanzierung: |
Deutsche Forschungsgemeinschaft |
Abstract
Low-density polyethylene (LDPE) is an important material or plastic, which, unfortunately, is synthesized under very harsh conditions and challenging to recycle. We report here on a highly flexible catalytic synthesis of multiply branched and long-chain branched polyolefins under mild conditions. We combine coordinative chain transfer polymerization of ethylene and branched alpha-olefins with ring-opening metathesis polymerization and hydrogenation catalysis. Our plastic contains two types of functional groups: olefins and esters. The olefin functional groups can be used to enable closed-loop recycling, and the ester groups permit faster decomposition than LDPE to potentially reduce the micro-plastic formation or enable a second depolymerization pathway. Our material matches key properties of LDPE, such as the melting point, rheology and stress–strain behavior.