Synthesis and self-assembly in aqueous solution of amphiphilic diblock copolymers containing hyperbranched polyethylene

Mai, BiYun; Liu, Ran; Li, ZhiYun; Feng, Shuo; Wu, Qing; Gao, Haiyang; Liang, Guodong; Zhu, Fangming

doi:10.1016/j.polymer.2014.12.017

Cited by 8 publications

(5 citation statements)

References 33 publications

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“…Since introduction of pendent carbon‐carbon double bonds in HBPE chains could allow for further functionalization of HBPE, for instance, by thiol‐ene click reaction, and easier vulcanization of HBPE for its application as a rubber, study on α‐diimine Ni(II) catalyzed copolymerization of ethylene with nonconjugated dienes would be a significant topic. Though much efforts have been paid to introducing polar functional groups or segments into HBPE via direct ethylene copolymerization with polar comonomers, strong deactivation of the catalysis system by the polar monomer actually render this route inapplicable for industry. In this work, ethylene copolymerizations with nonconjugated dienes catalyzed by α‐diimine Ni(II) catalyst were studied to introduce C = C bonds in HBPE as reactive moiety while reserve its highly branched chain structure.…”

Section: Introductionmentioning

confidence: 99%

Nonconjugated diene homopolymerization and copolymerization with ethylene catalyzed by α‐diimine Ni(II) complex/Et₂AlCl

Song

et al. 2017

J. Polym. Sci. Part A: Polym. Chem.

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Four nonconjugated diene comonomers 1,9‐decadiene (19DD), 6‐ethylundeca‐1,10‐diene (EUD), 1,5‐cyclooctadiene (COD) and cinene (1‐methyl‐4‐(prop‐1‐en‐2‐yl) cyclohex‐1‐ene) (CE) were used in copolymerization with ethylene catalyzed by α‐diimine Ni(II) complex ([2,6‐(iPr)2C6H3N = C(CH3)−(CH3)C = N2,6‐(iPr)2C6H3)]NiBr2 (1)) activated by Et2AlCl. These dienes showed quite distinct copolymerization behaviors. Ethylene‐19DD copolymerization formed highly branched polyethylene with cyclic units and pendent vinyls, and a large part of crosslinked polymer when the 19DD concentration was relatively high. Using EUD as comonomer lead to evidently reduced gel formation and increased content of pendent vinyl. COD can be incorporated in the copolymer with evidently lower catalyst efficiency than the ethylene homopolymerization, and CE behaves like an inert compound as it was not incorporated in the copolymer. Homopolymerization of 19DD with the same catalyst produced polymer containing both cyclic units and pendent vinyls. The cyclic units were formed by cyclopolymerization of the inserted 19DD after several steps of chain walking. Crosslinking through the pendent vinyl took place when the initial 19DD concentration was relatively high, forming large amount of gel in the product. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 1900–1909

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Section: Introductionmentioning

confidence: 99%

Nonconjugated diene homopolymerization and copolymerization with ethylene catalyzed by α‐diimine Ni(II) complex/Et₂AlCl

Song

et al. 2017

J. Polym. Sci. Part A: Polym. Chem.

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“…Benefitting from recent advances in polymer synthesis, amphiphilic polymers with various topological architectures, such as multiarm, linear-star, dendritic, and hyperbranched, have sprung up as precursors in self-assembly. − Individual self-assembly behaviors of these precursors have been widely discussed and demonstrate unique characteristics such as the diversity of structures self-assembled from the amphiphilic hyperbranched polymers. − At the same time, developing supramolecular polymers based on noncovalent bonds provides a new approach and perspective on research into building amphiphilic pseudoblock copolymers with novel topological features, − which greatly enriched the scope of preparing diverse self-assembled structures. − For nonlinear amphiphilic polymers, besides the hydrophilicity/hydrophobicity ratio, the intrinsic topological structure also plays an important role in their self-assembly behavior. It is of great importance to systematically investigate the effect of topological structures on the self-assembly behavior of nonlinear amphiphiles.…”

Section: Introductionmentioning

confidence: 99%

Effect of Topological Structures on the Self-Assembly Behavior of Supramolecular Amphiphiles

Wang

Yang

et al. 2015

Langmuir

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Three types of azobenzene-based telechelic guest polymers, PEG-azo, azo-PEG-azo, and PEG-azo4, were synthesized by a facile method. Subsequently, a series supramolecular amphiphiles with three distinct topological structures (hemitelechelic, ditelechelic, and quadritelechelic) were constructed through coupling with host polymer β-cyclodextrin-poly(l-lactide) (β-CD-PLLA) by combined host-guest complexation. Research on the self-assembly behavior of these amphiphiles demonstrated that the variation in self-assembly was tuned by the synergistic interaction of hydrophilicity and the curvature of the polymer chains, and very importantly, the topological structure of amphiphiles demonstrated effective control of the self-assembly behavior.

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“…The introduction of chlorine atoms and hydroxyl groups into polyethylene chains endows the polymers with valuable potential for further reactions to obtain high-value-added materials [ 94 , 95 , 96 , 97 ]. The N-bridged phosphine–carbonyl Ni catalyst 2b, bisphosphine-monoxide Ni catalysts 6b and 6d, and the heterogeneous phosphine-phenolate Ni catalyst 10a-Na-MgO have been developed for the copolymerization of ethylene with chloro-substituted α-olefins under elevated temperatures ( Table 4 , Entries 10–14) [ 54 , 62 , 70 ].…”

Section: Nickel Catalysts For Synthesizing Copolymers Of Ethylene And...mentioning

confidence: 99%

Recent Advances in Nickel Catalysts with Industrial Exploitability for Copolymerization of Ethylene with Polar Monomers

Wang,

Lai,

Gao

et al. 2024

Polymers

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The direct copolymerization of ethylene with polar monomers to produce functional polyolefins continues to be highly appealing due to its simple operation process and controllable product microstructure. Low-cost nickel catalysts have been extensively utilized in academia for the synthesis of polar polyethylenes. However, the development of high-temperature copolymerization catalysts suitable for industrial production conditions remains a significant challenge. Classified by the resultant copolymers, this review provides a comprehensive summary of the research progress in nickel complex catalyzed ethylene-polar monomer copolymerization at elevated temperatures in the past five years. The polymerization results of ethylene–methyl acrylate copolymers, ethylene-tert–butyl acrylate copolymers, ethylene–other fundamental polar monomer copolymers, and ethylene–special polar monomer copolymers are thoroughly summarized. The involved nickel catalysts include the phosphine-phenolate type, bisphosphine-monoxide type, phosphine-carbonyl type, phosphine-benzenamine type, and the phosphine-enolate type. The effective modulation of catalytic activity, molecular weight, molecular weight distribution, melting point, and polar monomer incorporation ratio by these catalysts is concluded and discussed. It reveals that the optimization of the catalyst system is mainly achieved through the methods of catalyst structure rational design, extra additive introduction, and single-site catalyst heterogenization. As a result, some outstanding catalysts are capable of producing polar polyethylenes that closely resemble commercial products. To achieve industrialization, it is essential to further emphasize the fundamental science of high-temperature copolymerization systems and the application performance of resultant polar polyethylenes.

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Synthesis and self-assembly in aqueous solution of amphiphilic diblock copolymers containing hyperbranched polyethylene

Cited by 8 publications

References 33 publications

Nonconjugated diene homopolymerization and copolymerization with ethylene catalyzed by α‐diimine Ni(II) complex/Et₂AlCl

Nonconjugated diene homopolymerization and copolymerization with ethylene catalyzed by α‐diimine Ni(II) complex/Et₂AlCl

Effect of Topological Structures on the Self-Assembly Behavior of Supramolecular Amphiphiles

Recent Advances in Nickel Catalysts with Industrial Exploitability for Copolymerization of Ethylene with Polar Monomers

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Synthesis and self-assembly in aqueous solution of amphiphilic diblock copolymers containing hyperbranched polyethylene

Cited by 8 publications

References 33 publications

Nonconjugated diene homopolymerization and copolymerization with ethylene catalyzed by α‐diimine Ni(II) complex/Et2AlCl

Nonconjugated diene homopolymerization and copolymerization with ethylene catalyzed by α‐diimine Ni(II) complex/Et2AlCl

Effect of Topological Structures on the Self-Assembly Behavior of Supramolecular Amphiphiles

Recent Advances in Nickel Catalysts with Industrial Exploitability for Copolymerization of Ethylene with Polar Monomers

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Product

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Nonconjugated diene homopolymerization and copolymerization with ethylene catalyzed by α‐diimine Ni(II) complex/Et₂AlCl

Nonconjugated diene homopolymerization and copolymerization with ethylene catalyzed by α‐diimine Ni(II) complex/Et₂AlCl