Late Transition Metal Catalysts with Chelating Amines for Olefin Polymerization DOI Open Access

Huiyun Deng,

Handou Zheng, Heng Gao

et al.

Catalysts, Journal Year: 2022, Volume and Issue: 12(9), P. 936 - 936

Published: Aug. 24, 2022

Polyolefins are the most consumed polymeric materials extensively used in our daily life and usually generated by coordination polymerization polyolefin industry. Olefin catalysts containing transition metal–organic compound combinations undoubtedly crucial for development of The nitrogen donor atom has attracted considerable interest is widely combination with metal fine-tuning chemical environment around center. In addition to reported olefin imine amide donors (sp2 hybrid N), late chelating amine (sp3 N) have never been reviewed. this review paper, we focus on (Ni, Pd, Fe, Co) amines polymerization. A variety bearing different neutral surveyed polymerization, including amine–imine, amine–pyridine, α-diamine, [N, N, N] tridentate ligands donors. relationship between catalyst structure catalytic performance also encompassed. This aims promote design unique high-performance materials.

Language: Английский

Tailor-Made Functional Polyolefins of Complex Architectures: Recent Advances, Applications, and Prospects DOI
Zahra Balzade, Farhad Sharif,

Seyed Reza Ghaffarian Anbaran

et al.

Macromolecules, Journal Year: 2022, Volume and Issue: 55(16), P. 6938 - 6972

Published: Aug. 12, 2022

Polyolefins play a crucial role in the polymer industry because of their low-cost monomers and well-established production processes. Recent years have witnessed tremendous progress direct tandem copolymerization strategies that provide an opportunity developing polyolefins bearing polar groups with distinctive architectures properties. In this perspective, we first highlight new routes for proficient synthesis tailor-made functional briefly discuss designing tactics. Then, attempt to categorize these, recently appeared literature, innovative on basis applications. The prospected future applications olefin copolymers include biomedical materials, catalysts, energy storage devices, conductive polymers, which open up arenas paradigms academic research industrial products development. Critical issues concerning intelligent green chemistry are discussed, too.

Language: Английский

Citations

31
Highly Active and Thermally Robust Nickel Enolate Catalysts for the Synthesis of Ethylene‐Acrylate Copolymers DOI
Shuoyan Xiong, Alexandria Hong,

B.C. Bailey

et al.

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(35)

Published: June 20, 2022

Abstract The insertion copolymerization of polar olefins and ethylene remains a significant challenge in part due to catalysts′ low activity poor thermal stability. Herein we demonstrate strategy toward addressing these obstacles through ligand design. Neutral nickel phosphine enolate catalysts with large substituents reaching the axial positions Ni achieve up 7.7×10 3 kg mol −1 h (efficiency >35×10 g copolymer/g Ni) at 110 °C, notable for ethylene/acrylate copolymerization. NMR analysis resulting copolymers reveals highly linear microstructures main‐chain ester functionality. Structure‐performance studies indicate strong correlation between steric hindrance catalyst performance.

Language: Английский

Citations

29
Photodegradable polar-functionalized polyethylenes DOI Creative Commons
Chaoqun Wang, Jian Xia, Yuxing Zhang

et al.

National Science Review, Journal Year: 2023, Volume and Issue: 10(7)

Published: Feb. 16, 2023

The degradation of plastics has attracted much attention from the global community. Polyethylenes (PEs), as most abundant synthetic plastics, are frequently studied. PE is non-degradable and non-polar because sole presence pure hydrocarbon components. Concurrent incorporation both in-chain cleavable functional groups into chain an effective pathway to overcome issue; however, method for achieving this remains elusive. Here, we report a strictly non-alternating (>99%) terpolymerization ethylene with CO fundamental polar monomers via coordination-insertion mechanism using late transition metal catalysts, which effectively prevents formation undesired chelates originating co-monomers under low concentration. High-molecular-weight linear PEs isolated keto main-chain prepared. key low-content makes photodegradable while retaining their desirable bulk material properties, introduction considerably improves surface properties.

Language: Английский

Citations

20
Advance on nickel‐ and palladium‐catalyzed insertion copolymerization of ethylene and acrylate monomers DOI Open Access
Handou Zheng, Zonglin Qiu,

Donghui Li

et al.

Journal of Polymer Science, Journal Year: 2023, Volume and Issue: 61(23), P. 2987 - 3021

Published: Aug. 8, 2023

Abstract Nickel‐ and palladium‐catalyzed insertion copolymerization of ethylene acrylate comonomers for synthesis ethylene‐acrylates copolymers have attracted much academic industrial interests remained highly challenging. This review provides an overview the developments in nickel‐ comonomers. Mechanistic interpretation metal‐catalyzed is described. Late transition metal catalysts are divided to nickel‐based palladium‐based with different chelate ligands. The effects catalyst structure on performance copolymer microstructure comprehensively discussed. aims promote design development nickel palladium ethylene/acrylate copolymerizations copolymers.

Language: Английский

Citations

20
Emulsion Polymerization Strategy for Heterogenization of Olefin Polymerization Catalysts DOI
Dan Peng, Menghe Xu, Chen Tan

et al.

Macromolecules, Journal Year: 2023, Volume and Issue: 56(6), P. 2388 - 2396

Published: March 6, 2023

Heterogenization of homogeneous metal catalysts on solid supports has been widely studied for product morphology control in ethylene polymerization. In this contribution, an emulsion polymerization strategy was introduced to achieve heterogenization various imino-based nickel olefin catalysts. A series polymeric microspheres were prepared through copolymerization vinyl-functionalized imino ligands with comonomers such as styrene or methyl methacrylate. The corresponding heterogeneous demonstrated superior properties and 10-undecylenate. Their catalytic can be controlled by tuning the comonomer type, composition, particle size. Most importantly, avoid reactor fouling while generating polyethylene products minimum inorganic contamination. addition, introduction polymer improve mechanical surface polyolefin products.

Language: Английский

Citations

17
Nickel‐ and Palladium‐Catalyzed Copolymerizations of Norbornene with Polar α‐Olefins DOI Creative Commons
Mingyuan Li,

Yueting Fang,

Zhengguo Cai

et al.

ChemCatChem, Journal Year: 2024, Volume and Issue: unknown

Published: March 26, 2024

Abstract Recent progress regarding the copolymerization of norbornene with various polar α‐olefins catalyzed by nickel and palladium catalysts is reviewed here special attention paid to diverse catalyst frameworks, monomer scopes as well polymer microstructures. Both influences steric effect electron property ligand substituents type monomers on catalytic behaviors (activity, stability, polarity tolerance, etc.) microstructures (molecular weight distribution, comonomer contents, have been summarized. The introduction noncyclic‐olefins, such vinyl monomers, higher α‐olefins, styrenes, into rigid cyclic‐based polynorbornene chain resulted in significant modifications polarity, compatibility, thermostability, processibility, transparency, many other properties material, which has also discussed review. contents this review classified according involved copolymerization, each section included bearing different structures, will be meaningful for development new types families norbornene‐based cyclic olefin copolymer materials future.

Language: Английский

Citations

8
Noncovalent Interactions in Late Transition Metal-Catalyzed Polymerization of Olefins DOI
Handou Zheng, Haiyang Gao

Macromolecules, Journal Year: 2024, Volume and Issue: 57(15), P. 6899 - 6913

Published: July 23, 2024

Language: Английский

Citations

8
Molecularly Defined Polyolefin Vitrimers from Catalytic Insertion Polymerization DOI
Lukas Odenwald, Florian P. Wimmer, Nina K. Mast

et al.

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(29), P. 13226 - 13233

Published: July 15, 2022

Vitrimers can combine the advantageous properties of cross-linked materials with thermoplastic processability. For prominent case polyethylene, established post-polymerization introduction cross-linkable moieties results in extremely heterogeneous compositions chains. Here, we report generation functionalized polyethylenes directly by catalytic insertion polymerization, incorporated aryl boronic esters or alternatively acetal-protected groups suited for cross-linking difunctional esters. In addition to desired homogeneous in-chain distribution, reactive are enriched at chain ends. This enables incorporation all chains network, as also supported simulations chains' compositions. The uniform molecular composition reflects resulting vitrimers' material properties, particularly lack leaching solvents. At same time, is indeed fully reversible and vitrimers be recycled.

Language: Английский

Citations

25
Impact of Labile Ligands on Catalyst Initiation and Chain Propagation in Ni-Catalyzed Ethylene/Acrylate Copolymerization DOI
Shuoyan Xiong, Priyabrata Ghana,

B.C. Bailey

et al.

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(7), P. 5000 - 5006

Published: March 29, 2023

Polar polyolefin synthesis by coordination polymerization is of high interest, but the catalysts' low activity limits industrial implementation. Herein, we demonstrate how nature labile ligand, L, impacts performance neutral nickel catalysts supported bidentate phosphine-phenoxide and phosphine-enolate ligands in ethylene/acrylate copolymerization. By tuning copolymerization reaches ∼24000 kg/(mol h). In situ studies indicate that a weaker L leads to faster chain propagation more efficient catalyst initiation. Overall, this work highlights potential strategy improve polar complementary design optimization for ligand.

Language: Английский

Citations

14
Antimigration Polypropylene Antioxidants: A Review DOI
Zijia Li, Chun‐Ting Zhang, Yu Jiang

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(4), P. 1713 - 1728

Published: Jan. 17, 2024

Hindered phenolic antioxidants have been extensively recognized and applied to boost the heat resistance oxidative aging performance of poly(propylene) (PP) composites. Low-molecular-weight are easy volatilize, migrate, be extracted from PP or PP-based products, which can directly reduce antithermal effect its composites, it contaminate food drugs under packaging. The design an efficient durable antioxidant with antimigration has drawn attention researchers. Currently, three main approaches explored: (I) enhancement molecular weight, that is, high weight stimulate structure stability toward migration; (II) inorganic immobilization, involves immobilizing on substrate enhance dispersion performance; (III) intercalation-mediated assembly, involved intercalating low-molecular-weight into interlayer region a layered host based host–guest interaction.

Language: Английский

Citations

5