One-Pot Synthesis of Polyethylene-Based Block Copolymers <i>via</i> a Dual Polymerization Pathway

Zhao, Yajun; Jung, Jin Chul; Nozaki, Kyoko

doi:10.1021/jacs.1c08512

Cited by 10 publications

(11 citation statements)

References 47 publications

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“…More recently, Nozaki et al introduced a method of “self-switching” between coordination–insertion polymerization and OMRP to prepare multiblock copolymers of PE and PMA . This was accomplished through the utilization of pentamethylcyclopentadienyl cobalt complex (Co III (η 5 -C5H5)P(OMe) 3 I 2 )/MMAO system.…”

Section: Block Copolymers From Polyolefinsmentioning

confidence: 99%

Linear Block Copolymer Synthesis

et al. 2022

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Block copolymers form the basis of the most ubiquitous materials such as thermoplastic elastomers, bridge interphases in polymer blends, and are fundamental for the development of high-performance materials. The driving force to further advance these materials is the accessibility of block copolymers, which have a wide variety in composition, functional group content, and precision of their structure. To advance and broaden the application of block copolymers will depend on the nature of combined segmented blocks, guided through the combination of polymerization techniques to reach a high versatility in block copolymer architecture and function. This review provides the most comprehensive overview of techniques to prepare linear block copolymers and is intended to serve as a guideline on how polymerization techniques can work together to result in desired block combinations. As the review will give an account of the relevant procedures and access areas, the sections will include orthogonal approaches or sequentially combined polymerization techniques, which increases the synthetic options for these materials.

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Section: Block Copolymers From Polyolefinsmentioning

confidence: 99%

Linear Block Copolymer Synthesis

et al. 2022

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“…The use of compounds based on olefins as a plasticizer comonomer for the production of high-impact copolymer based on styrene and methyl methacrylate is considered an important area of research [15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Study of Copolymers of Methyl Methacrylate Wi̇th Oligopropylene Macromonomers

Dostuyeva¹

2022

AChJ

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The reaction of radical copolymerization of oligopropylene macromonomer (M1) with methyl methacrylate (M2) has been carried out, the regularities of the reaction and the properties of the obtained products have been studied. It has been found that the values of the relative activity of these monomers are r1=0.02 and r2=12.2, respectively. The fact that the value of the copolymerization constant of the oligopropylene macromonomer is close to zero indicates that it is not prone to homopolymerization reactions and only undergoes copolymerization reactions. The dependence of some properties of the synthesized copolymer on their composition has been studied and it has been shown that with an increase in the amount of the fragment formed from the oligopropylene macromonomer, the softening temperature and intrinsic viscosity values of the copolymers decrease, and, accordingly, a sharp decrease in the average molecular weight is observed. This is due to the passivity of the oligopropylene macromonomer in copolymerization reactions and the high probability of a chain transfer reaction through the oligopropylene macromonomer.

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“…In free-radical polymerizations this is achieved by reversible trapping of radicals to dormant species, thereby disfavoring termination reactions versus chain growth. Various different approaches such as reversible addition–fragmentation transfer (RAFT), atom transfer radical polymerization, or organometallic mediated radical polymerization can realize the concept of reversible deactivation radical polymerization (RDRP), and they have been studied intensely for a wide range of vinylic monomers. − However, controlled radical polymerizations of carbon monoxide have remained elusive.…”

mentioning

confidence: 99%

Controlled Cobalt-Mediated Free-Radical Co- and Terpolymerization of Carbon Monoxide

Fuchs

Mecking

2022

J. Am. Chem. Soc.

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While controlled free-radical polymerizations are established for a vast range of vinyl monomers, they have not been reported for carbon monoxide, although it is a unique monomer that forms in-chain keto groups which can promote, for example, desirable photo-degradability in polyethylenes. We report organometallic-mediated radical copolymerization of carbon monoxide with ethylene initiated by an organocobalt III compound to keto-modified polyethylenes with up to 15 mol % ketone repeat units. Terpolymerization with 2-methylene-1,3-dioxepane affords polyethylenes with in-chain ester and keto groups. Compared to ethylene homopolymerization, the controlled character of the copolymerization is strongly enhanced by the Lewis base function of carbon monoxide, which suppresses multiple unfavorable termination pathways.

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One-Pot Synthesis of Polyethylene-Based Block Copolymers via a Dual Polymerization Pathway

Cited by 10 publications

References 47 publications

Linear Block Copolymer Synthesis

Linear Block Copolymer Synthesis

Synthesis and Study of Copolymers of Methyl Methacrylate Wi̇th Oligopropylene Macromonomers

Controlled Cobalt-Mediated Free-Radical Co- and Terpolymerization of Carbon Monoxide

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