Publikation:

Circular Cross-Linked Polyethylene Enabled by In-Chain Ketones

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2024

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http://nbn-resolving.de/urn:nbn:de:bsz:352-2-dcw1l7goxasu7
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https://doi.org/10.1021/acsmacrolett.4c00660
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CC BY 4.0

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ACS Macro Letters. ACS Publications. 2024, 13(12), S. 1655-1661. ISSN 2161-1653. eISSN 2161-1653. Verfügbar unter: doi: 10.1021/acsmacrolett.4c00660

Zusammenfassung

Cross-linked polyethylenes (PEs) are widely employed, but the permanent links between the chains impede recycling. We show that via imine formation with diamines keto-functionalized polyethylenes from both free-radical (keto-low-density PE, keto-LDPE) and catalytic (keto-high-density PE, keto-HDPE) nonalternating ethylene-CO copolymerization can be cross-linked efficiently in the melt, resulting in gel fractions of the formed cross-linked PEs of up to 85% and improved tensile properties. The imine-based cross-links in the material can be hydrolyzed at 140 °C to recycle up to 97% of the initial thermoplastic keto-polyethylene. Low keto contents of ≤1.5 mol % are found ideal to retain PE-like thermal properties, achieve sufficient cross-link density, and maintain circular recyclability.

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540 Chemie

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ISO 690MORGEN, Tobias O., Stefan MECKING, 2024. Circular Cross-Linked Polyethylene Enabled by In-Chain Ketones. In: ACS Macro Letters. ACS Publications. 2024, 13(12), S. 1655-1661. ISSN 2161-1653. eISSN 2161-1653. Verfügbar unter: doi: 10.1021/acsmacrolett.4c00660
BibTex
@article{Morgen2024-12-17Circu-71547,
  year={2024},
  doi={10.1021/acsmacrolett.4c00660},
  title={Circular Cross-Linked Polyethylene Enabled by In-Chain Ketones},
  number={12},
  volume={13},
  issn={2161-1653},
  journal={ACS Macro Letters},
  pages={1655--1661},
  author={Morgen, Tobias O. and Mecking, Stefan}
}
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