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
Atom transfer radical polymerization of some vinyl monomers catalyzed by imine macrocycle copper (I) complex
Amal Amin,M. A. Abd El-Ghaffar +1 more
TL;DR: Imine macrocyclic ligand (M1) was used in conjunction with CuBr as novel catalytic system in atom transfer radical polymerization (ATRP) of methylmethacrylate (MMA).
Journal ArticleDOI
Cyclometalated Ruthenium(II) Complex as a Versatile Catalyst for Living/Controlled Radical Polymerization of Hydrophobic and Hydrophilic Monomers
Nelson Vargas Alfredo,Carla Aguilar-Lugo,Ortencia Diaz Gonzalez,Ronan Le Lagadec,Larissa Alexandrova +4 more
TL;DR: In this article, a cyclometalated complex, cis-[Ru(phpy)(phen)(MeCN)2]PF6, bearing strongly bound ligands (phpy, pyridine, phen, 1, 10-phenantroline) and relatively labile ligands, in conjunction with ethyl 2-bromoisobutyrate (EBiB), was used for radical polymerization of three hydrophobic, styrene (St), methyl methacrylate (MMA), n-butyl acrylate, and one hydroph
Journal ArticleDOI
Synthesis of C60‐bonded polystyrene initiated with C60Cln/Ni(naph)2/P(Ph)3
TL;DR: In this paper, a linear-shaped polystyrene with C60 core was prepared with a novel initiator system, C60Cln (n average value is 20)/Ni(naph)2/P(Ph)3, and Tp was 130 °C.
Patent
Controlled polymerization and copolymerization process of (meth)acrylic and vinylic monomers and products therefrom
TL;DR: In this article, a method for controlled radical (co)polymerization of (meth)acrylic and/or vinyl monomers in bulk, solution, emulsion or suspension at temperatures which can go as low as 0 degrees C comprises polymerisation of at least one of said monomers, in presence of initiating system consisting of radical generating compound, and at least 1 catalyst consisting of metal complex with ligand of type AC6H2(CH2NR1R2)2-2,6-R3-4U (I), in which R
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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