Publikation:

Catalytic synthesis of in-chain keto-functionalized polyethylene materials

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2023

Autor:innen

Baur, Maximilian

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European Union (EU): 832480

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DEEPCAT: Degradable Polyolefin Materials Enabled by Catalytic Methods
Open Access-Veröffentlichung
Open Access Green
Core Facility der Universität Konstanz
NMR Core Facility, Partikelanalysezentrum, Electron Microscopy Centre

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Dissertation
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Zusammenfassung

The world’s most successful synthetic plastic material, polyethylene, features a particularly pronounced chemical inertness, due to its molecular semi-crystalline hydrocarbon architecture. This has led to a significant accumulation of waste polyethylene in landfills or littered to the environment. One possible approach towards less persistent polyethylene materials is the installation of a low density of in-chain carbonyl groups into the polyethylene backbone, which can act as predetermined breaking points in the otherwise inert hydrocarbon chain. In-chain keto-groups in particular, are promising in this regard, since they can endow the polymer with photodegradability as well as serve as a platform for an array of chemical transformations. This work describes how such in-chain keto-functionalized polyetheylene materials are accessible via direct nonalternating copolymerization of ethylene and carbon monoxide catalyzed by neutral phosphinophenolate [P,O]Ni(II) catalysts. These obtained keto-functionalized polyethylenes (keto-PEs) are extensivley characterized and investigated for photodegradation and chemical modification. Further, the scope of the nonalternating catalytic copolymerization of ethylene and carbon monoxide is explored regarding variation in additional comonomers and reaction media which enables an array of keto-PEs with different materials properties. These findings are a significant progress in catalytic ethylene copolymerization with fundamental polar compounds and can provide potential access to less persistent polyethylene materials.

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Fachgebiet (DDC)
540 Chemie

Schlagwörter

Functionalized polyethylene, Degradable polyethylene, Polymerization catalysis, non-alternating copolymerization, Polyethylene, Carbon monoxide, Photodegradation

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ISO 690BAUR, Maximilian, 2023. Catalytic synthesis of in-chain keto-functionalized polyethylene materials [Dissertation]. Konstanz: Universität Konstanz
BibTex
@phdthesis{Baur2023Catal-70345,
  year={2023},
  title={Catalytic synthesis of in-chain keto-functionalized polyethylene materials},
  author={Baur, Maximilian},
  address={Konstanz},
  school={Universität Konstanz}
}
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This work describes how such in-chain keto-functionalized polyetheylene materials are accessible via direct nonalternating copolymerization of ethylene and carbon monoxide catalyzed by neutral phosphinophenolate [P,O]Ni(II) catalysts. These obtained keto-functionalized polyethylenes (keto-PEs) are extensivley characterized and investigated for photodegradation and chemical modification. Further, the scope of the nonalternating catalytic copolymerization of ethylene and carbon monoxide is explored regarding variation in additional comonomers and reaction media which enables an array of keto-PEs with different materials properties.
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Prüfungsdatum der Dissertation

June 14, 2024
Hochschulschriftenvermerk
Konstanz, Univ., Diss., 2024
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