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
Living/controlled radical polymerization of methyl methacrylate by reverse ATRP with DCDPS/FeCl3/PPh3 initiating system
TL;DR: In this article, a living/controlled radical polymerization of methyl methacrylate (MMA) was investigated using a new initiating system, i.e., DCDPS/FeCl3/PPh3, in which diethyl 2,3-dicyano-2,3diphenylsuccinate (DCDPS) is a hexa-substituted ethane thermal iniferter.
Journal ArticleDOI
Iron-catalyzed living radical polymerization of acrylates: Iodide-based initiating systems and block and random copolymerizations
TL;DR: A half-metallocene iron iodide complex [Fe(Cp)I(CO)2] induced living radical polymerization of methyl acrylate (MA) in conjunction with an iodide initiator [(CH3)2C(CO2Et)I, 1] and Al(Oi-Pr)3) to give polymers of controlled molecular weights and narrow molecular weight distributions (MWDs) as discussed by the authors.
Journal ArticleDOI
Atom transfer radical polymerization of styrene and methyl methacrylate catalyzed by FeCl2/iminodiacetic acid
Shenmin Zhu,Deyue Yan +1 more
TL;DR: The atom transfer radical polymerization of styrene and methyl methacrylate with FeCl2/iminodiacetic acid as the catalyst system in bulk was successfully implemented at 70 and 110 °C, respectively as mentioned in this paper.
Journal ArticleDOI
Evolution of iron catalysts for effective living radical polymerization: P–N chelate ligand for enhancement of catalytic performances
TL;DR: In this article, a P-N ligand was used for living radical polymerization of methyl methacrylate (MMA) in conjunction with a bromide initiator, where the monomer conversion reached over 90% without dropping the rates and the molecular weights of obtained PMMAs were well controlled.
Journal ArticleDOI
Elastomer monolayers adsorbed on mica surfaces by nitroxide-mediated polymerisation
Leila Ghannam,Leila Ghannam,Marie Bacou,Hélène Garay,Martin E.R. Shanahan,Jeanne François,Laurent Billon +6 more
TL;DR: In this article, a free radical initiator 2,2′-azobis(isobutyramidine hydrochloride) (AIBA) was attached by ion exchange to the surface of mica, and the resulting was used as a initiator to polymerise butyl acrylate.
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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