Journal ArticleDOI
Controlled Radical Polymerization of Methacrylic Monomers in the Presence of a Bis(ortho-chelated) Arylnickel(II) Complex and Different Activated Alkyl Halides
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TLDR
In this article, a novel class of homogeneous nickel(II) catalysts, denoted as Ni(NCN)Br, is reported to mediate in the presence of activated alkyl halides, e.g., CCl4 or α-halocarbonyl compounds, and remarkably enough, poly(methyl methacrylate) (PMMA) with molecular weight up to at least 105 g/mol was synthesized in a controlled fashion.Abstract:
A novel class of homogeneous nickel(II) catalysts, i.e [Ni{o,o‘(CH2NMe2)2C6H3}Br], denoted as Ni(NCN‘)Br, is reported to mediate in the presence of activated alkyl halides, e.g., CCl4 or α-halocarbonyl compounds, a well-controlled radical polymerization of methacrylic monomers [methyl and n-butyl methacrylate), (MMA, n-BuMA)] at rather low temperatures (<100 °C). The number-average molecular weight of the polymer gradually increased with the monomer conversion and was inversely proportional to the initiator concentration of alkyl halides. The molecular weight distribution (MWD) remained very narrow during the whole course of the polymerization (MWD < 1.3). All the experimental data including a successful block copolymerization (n-BuMA-b-MMA) experiment were in agreement with a living polymerization process, and remarkably enough, poly(methyl methacrylate) (PMMA) with molecular weight up to at least 105 g/mol was synthesized in a controlled fashion. Increased thermal stability of the PMMA is a further indi...read more
Citations
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Journal ArticleDOI
New polyphenylene-based macromolecular architectures by using well defined macromonomers synthesized via controlled polymerization methods
Ioan Cianga,Yusuf Yagci +1 more
TL;DR: In this article, the authors describe recent directions in the preparation of PPP graft copolymers with various polymeric side-chains, including atom transfer radical polymerization or ring opening polymerization.
Journal ArticleDOI
Atom transfer radical copolymerization of n‐hexylmaleimide and styrene in an ionic liquid
TL;DR: In this article, the atom transfer radical copolymerization of N-hexylmaleimide and styrene in an ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate, was investigated.
Book ChapterDOI
Telechelic Oligomers and Macromonomers by Radical Techniques
TL;DR: In this paper, a review summarizes nearly 400 references (since 1990) intended to highlight directions on the synthesis of telechelic oligomers and macromonomers by radical techniques, taking into account the recent developments in conventional radical polymerizations, such as dead-end polymerizationand also telomerization reactions.
Journal ArticleDOI
Star polymers via atom transfer radical polymerization from adamantane-based cores
TL;DR: In this paper, a series of novel multifunctional initiators derived from adamantane-based derivatives were used in the syntheses of various styrenic and (meth)acrylic star polymers by atom transfer radical polymerization.
Journal ArticleDOI
Correlation of metal spin-state in alpha-diimine iron catalysts with polymerization mechanism
TL;DR: In this article, the α-diimine iron complexes with high-spin spin-state iron centers were found to polymerize styrene through a catalytic chain transfer (CCT) mechanism.
References
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Journal ArticleDOI
Controlled/"living" radical polymerization. atom transfer radical polymerization in the presence of transition-metal complexes
Journal ArticleDOI
Polymerization of Methyl Methacrylate with the Carbon Tetrachloride/Dichlorotris- (triphenylphosphine)ruthenium(II)/Methylaluminum Bis(2,6-di-tert-butylphenoxide) Initiating System: Possibility of Living Radical Polymerization
Journal ArticleDOI
Narrow molecular weight resins by a free-radical polymerization process
TL;DR: In this paper, free radical polymerization was used to obtain polystyrene and poly(styrene-co-butadiene) with narrow polydispersity (1.19-1.36) in the presence of 2,2,6, 6,6-tetramethyl-1-piperidinyloxy using benzoyl peroxide as initiator
Journal ArticleDOI
Controlled Living Radical Polymerization - Halogen Atom-Transfer Radical Polymerization Promoted by a Cu(I)Cu(II) Redox Process
TL;DR: An extension of ATRA to atom transfer radical addition, ATRP, provided a new and efficient way to conduct controlled/living radical polymerization as mentioned in this paper, using a simple alkyl halide, R-X (X = Cl and Br), as an initiator and a transition metal species complexed by suitable ligand(s), M t n /L x, e.g., CuX/2,2'-bipyridine, as a catalyst.
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