Macromolecules, Год журнала: 2024, Номер 57(15), С. 6899 - 6913
Опубликована: Июль 23, 2024
Язык: Английский
Macromolecules, Год журнала: 2024, Номер 57(15), С. 6899 - 6913
Опубликована: Июль 23, 2024
Язык: Английский
ACS Catalysis, Год журнала: 2019, Номер 9(12), С. 11153 - 11188
Опубликована: Ноя. 8, 2019
Polymers have become one of the largest and most important materials we use in daily life. Their popularity has stemmed from their wide range material properties combined with low cost production. Both these attractive traits part been enabled by development catalytic polymerizations, which provide both high levels control while also delivering productivity. In this Perspective, highlight recent trends achievements made growing field polymerizations.
Язык: Английский
Процитировано
231Chemical Science, Год журнала: 2019, Номер 10(38), С. 8724 - 8734
Опубликована: Янв. 1, 2019
The width and shape of molecular weight distributions can significantly affect the properties polymeric materials thus are key parameters to control. This mini-review aims critically summarise recent approaches developed tailor highlights strengths limitations each technique. Special emphasis will also be given applications where tuning distribution has been used as a strategy not only enhance polymer but increase fundamental understanding behind complex mechanisms phenomena.
Язык: Английский
Процитировано
186Science, Год журнала: 2021, Номер 374(6567), С. 604 - 607
Опубликована: Окт. 28, 2021
The world’s most abundantly manufactured plastic, polyethylene, consists of inert hydrocarbon chains. introduction reactive polar groups in these chains could help overcome problematic environmental persistence and enhance compatibility with other materials. We show that phosphinophenolate-coordinated nickel complexes can catalyze nonalternating copolymerization ethylene carbon monoxide to incorporate a low density individual in-chain keto polyethylene high molecular weight while retaining desirable material properties. After processing by conventional injection molding techniques, tensile properties remain on par those standard high-density also imparting photodegradability.
Язык: Английский
Процитировано
173Coordination Chemistry Reviews, Год журнала: 2021, Номер 435, С. 213802 - 213802
Опубликована: Фев. 14, 2021
Язык: Английский
Процитировано
171Angewandte Chemie International Edition, Год журнала: 2020, Номер 59(34), С. 14296 - 14302
Опубликована: Май 22, 2020
Branched polyolefin microstructures resulting from so-called "chain walking" are a fascinating feature of late transition metal catalysts; however, to date it has not been demonstrated how desirable branched can be generated thereby. We demonstrate highly polyethylenes with methyl branches (220 Me/1000 C) exclusively and very high molecular weights (ca. 10
Язык: Английский
Процитировано
142Nature Communications, Год журнала: 2022, Номер 13(1)
Опубликована: Апрель 12, 2022
The heterogenization of homogeneous metal complexes on solid supports presents an efficient strategy for bridging catalysts with industrially-preferred heterogeneous catalysts; however, a series drawbacks restrict their implementation in olefin polymerization, particularly copolymerization polar comonomers. In this contribution, we report ionic anchoring that is highly versatile, generally applicable to different systems, and enables strong catalyst-support interactions while tolerating various functional groups. addition greatly enhanced polymerization properties, the supported achieved higher comonomer incorporation than unsupported counterparts. This enabled at high temperatures large scale great control over product morphology, facile synthesis polyolefin composites. More importantly, dispersion fillers matrix produced material properties even low composite loadings. It expected will find applications catalytic systems advanced engineering materials.
Язык: Английский
Процитировано
110Macromolecules, Год журнала: 2022, Номер 55(6), С. 1910 - 1922
Опубликована: Март 1, 2022
Polyethylenes enjoy wide applications due to their many superior properties. The incorporation of some polar functional groups into the otherwise nonpolar polyethylene backbone can significantly improve important properties and further broaden applications. During past few decades, catalyst systems have been demonstrated with capabilities copolymerizing ethylene monomers. As a result, numerous functionalized polyethylenes prepared bearing various groups. However, studies material from transition-metal-catalyzed ethylene–polar monomer copolymerization not received much attention until recently. After brief discussions selected examples potent catalysts suitable monomers, this Perspective summarizes recent advances in improvements surface compatibilities (hydrophilicity, adhesion, dyeability, compatibility other types polymers) induced through group as well custom-made such elastic, flame-retardant, antibacterial, antioxidant, cross-linking, self-healing, light response, dynamic photodegradation
Язык: Английский
Процитировано
107Progress in Polymer Science, Год журнала: 2023, Номер 143, С. 101713 - 101713
Опубликована: Июнь 25, 2023
Язык: Английский
Процитировано
83ACS Catalysis, Год журнала: 2022, Номер 12(22), С. 14304 - 14320
Опубликована: Ноя. 7, 2022
Precise synthesis of the complex polymer structure has been long-sought. In late transition-metal catalyzed olefin polymerization, chain walking and transfer are two important processes that affect architectures, molecular weights distributions, respectively. However, both uncontrolled presence make it difficult to precisely synthesize desired polyolefin materials. How address these key events is a long-standing challenge. This Perspective highlights advances on controlled suppression reactions in late-transition-metal-mediated polymerization prepare well-defined polyolefins. Fruitful catalyst strategies versatile techniques powerful tools accomplish elusive control over architectures.
Язык: Английский
Процитировано
76Trends in Chemistry, Год журнала: 2023, Номер 5(2), С. 147 - 159
Опубликована: Янв. 7, 2023
Процитировано
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