@article{Morgen2020-07-23Photo-50572,
  year={2020},
  doi={10.1038/s41467-020-17542-5},
  title={Photodegradable branched polyethylenes from carbon monoxide copolymerization under benign conditions},
  number={1},
  volume={11},
  journal={Nature Communications},
  author={Morgen, Tobias O. and Baur, Maximilian and Göttker-Schnetmann, Inigo and Mecking, Stefan},
  note={Article Number: 3693}
}

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    <dcterms:title>Photodegradable branched polyethylenes from carbon monoxide copolymerization under benign conditions</dcterms:title>
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    <dc:contributor>Göttker-Schnetmann, Inigo</dc:contributor>
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    <dc:contributor>Baur, Maximilian</dc:contributor>
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    <dcterms:abstract xml:lang="eng">Small amounts of in-chain keto groups render polyethylene (PE) photodegradable, a desirable feature in view of environmental plastics pollution. Free-radical copolymerization of CO and ethylene is challenging due to the formation of stable acyl radicals which hinders further chain growth. Here, we report that copolymerization to polyethylenes with desirable low ketone content is enabled in dimethyl carbonate organic solvent or under aqueous conditions at comparatively moderate pressures &lt;350 atm that compare favorable to typical ethylene polymerization at 2000 atm. Hereby, thermoplastic processable materials can be obtained as demonstrated by injection molding and tensile testing. Colloidally stable dipersions from aqueous polymerizations form continuous thin films upon drying at ambient conditions. Extensive spectroscopic investigation including &lt;sup&gt;13&lt;/sup&gt;C labeling provides an understanding of the branching microstructures associated with keto groups. Exposure of injection molded materials or thin films to simulated sunlight under sea-like conditions results in photodegradation.</dcterms:abstract>
    <dc:creator>Morgen, Tobias O.</dc:creator>
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    <dc:contributor>Mecking, Stefan</dc:contributor>
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