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
More filters
Journal ArticleDOI
Controlled/living polymerization of MMA promoted by heterogeneous initiation system (EPN-X-CuX-bpy)
TL;DR: In this paper, the authors studied the effect of heterogeneous initiation systems on the controlled polymerization of methyl methacrylate (MMA) and showed that a high value of dielectric constant (e) will lead to fast initiation and narrow molecular weight distribution.
Patent
Hybrid particle composite structures with reduced scattering
TL;DR: In this paper, a core-shell composite particle for incorporation into a composite wherein the composite has improved transparency is disclosed, which includes a core material having a first refractive index and a shell material with a second one having a second this paper.
Journal ArticleDOI
ATRP of methyl methacrylate using a novel binol ester-based bifunctional initiator
TL;DR: In this article, a detailed investigation of the ATRP of methyl methacrylate (MMA) with the bifunctional initiators (BBiBN) along with CuBr or CuCl/MDETA catalyst system in anisole was carried out at 30 °C.
Journal ArticleDOI
A new pigment type : Colored diblock copolymer-mica composites
TL;DR: In this article, a block copolymerization of butyl acrylate and a mixture of styrene (S) and a modified alizarin (A) dye was performed after physical adsorption of a radical initiator with a cationic group.
Journal ArticleDOI
Atom transfer radical copolymerization of N‐phenylmaleimide and styrene initiated with dendritic polyarylether 2‐bromoisobutyrate
TL;DR: In this paper, the effects of monomer feed on the activation enthalpy and copolymer composition were also studied, and the monomer reactivity ratios were determined to be r1 = 0.0325 and r2 = 0.0524 according to the Kelen-Tudős method.
References
More filters
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.
Related Papers (5)
Controlled/"living" radical polymerization. atom transfer radical polymerization in the presence of transition-metal complexes
Living radical polymerization of styrene initiated by arenesulfonyl chlorides and CuI(bpy)nCl
Virgil Percec,Bogdan Barboiu +1 more