Journal ArticleDOI
Controlled Radical Polymerization of Methacrylic Monomers in the Presence of a Bis(ortho-chelated) Arylnickel(II) Complex and Different Activated Alkyl Halides
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
A novel immobilized cobalt(II)/copper(II) bimetallic catalyst for atom transfer radical polymerization (ATRP) of methyl methacrylate
TL;DR: In this article, a cross-linked poly(acrylic acid) (PAA) resin immobilized cobalt(II)/copper(II) bimetallic catalyst was successfully employed for atom transfer radical polymerization (ATRP) of methyl methacrylate (MMA).
Journal ArticleDOI
Controlled radical polymerization catalyzed by copper(I)–sparteine complexes
Bin Yu,Eli Ruckenstein +1 more
TL;DR: Sparteine was found to be an efficient ligand because when complexed with copper(I) halide it generated a homogeneous catalyst for the atom transfer radical polymerization of styrene or methyl methacrylate, which was initiated by (1-bromoethyl)benzene in the former case and by p-toluenesulfonyl chloride in the latter.
Journal ArticleDOI
AxBAx-Type Block−Graft Polymers with Middle Soft Segments and Outer Hard Graft Chains by Ruthenium-Catalyzed Living Radical Polymerization: Synthesis and Characterization
Yu Miura,Kotaro Satoh,Masami Kamigaito,Yoshio Okamoto,Takeshi Kaneko,Hiroshi Jinnai,Syuji Kobukata +6 more
TL;DR: Ruthenium-catalyzed living radical polymerization was applied to the synthesis of a series of all methacrylic well-defined AxBAx-type block-graft copolymers consisting of soft middle segments [dodecyl methacrylate (DMA)] and hard outer graft chains [MMA] with controlled lengths of the backbone and graft chains and controlled graft numbers as mentioned in this paper.
Journal ArticleDOI
Einelektronenreaktionen von Übergangsmetallkomplexen in der radikalischen Polymerisation
TL;DR: In this paper, the Rolle von Einelektronenreaktionen von Ubergangsmetallkomplexen bei metallvermittelten kontrollierten radikalischen polymers is discussed.
Journal ArticleDOI
The Effect of Initiators and Reaction Conditions on the Polymer Syntheses by Atom Transfer Radical Polymerization
TL;DR: In this paper, the effect of initiators and reaction conditions on the atom transfer radical polymerization (ATRP) results was investigated and it was found that the results of the ATRP processes followed a first-order kinetics with respect to the monomer concentration.
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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