Journal ArticleDOI
Controlled Radical Polymerization of Methacrylic Monomers in the Presence of a Bis(ortho-chelated) Arylnickel(II) Complex and Different Activated Alkyl Halides
Reads0
Chats0
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
para-Functionalized NCN-Pincer Palladium(II) Complexes: Synthesis, Catalysis and DFT Calculations
Harm P. Dijkstra,Martijn Q. Slagt,Aidan R. McDonald,Cornelis A. Kruithof,Robert Kreiter,Allison M. Mills,Martin Lutz,Anthony L. Spek,Wim Klopper,Gerard P. M. van Klink,Gerard van Koten +10 more
TL;DR: In this article, the effect of the para substituents on the partial charge at the palladium(II) center was investigated by means of the Mulliken population analysis, and it was found that various para functionalities can be used for immobilization of the pincer−metal complexes without affecting the catalytic activity of individual sites.
Journal ArticleDOI
Room temperature atom transfer radical polymerization of glycidyl methacrylate mediated by copper(I)/N-alkyl-2-pyridylmethanimine complexes
R. Krishnan,K. S. V. Srinivasan +1 more
TL;DR: The homogeneous controlled/living free radical polymerization of glycidyl methacrylate (GMA) by ATRP using Cu(I)X/N-alkyl-2-pyridylmethanimine complexes is described in this article.
Journal ArticleDOI
Use of an Immobilized/Soluble Hybrid ATRP Catalyst System for the Preparation of Block Copolymers, Random Copolymers, and Polymers with High Degree of Chain End Functionality
Sung Chul Hong,Jean-François Lutz,Yoshihisa Inoue,Christine Strissel,Oskar Nuyken,Krzysztof Aleksander Matyjaszewski +5 more
TL;DR: An immobilized/soluble hybrid catalyst system (CuBr/PS8-dMbpy)/(CuBr2/Me6TREN) for atom transfer radical polymerization (ATRP) was applied to the preparation of polymers exhibiting various architectures.
Journal ArticleDOI
Living radical polymerization of para-substituted styrenes and synthesis of styrene-based copolymers with rhenium and iron complex catalysts
TL;DR: In this paper, living radical polymerizations of para-substituted styrenes (p-chloro, p-methyl, pacetoxy and p-acetoxymethyl) were examined with the oxo-complex of rhenium(V) and half-metallocene carbonyl complexes of iron(II) in the presence of metal alkoxides, all coupled with an iodoester initiator [(CH 3 ) 2 C(CO 2 Et)I] and FeCpI (M w /M n = 1.29
Journal ArticleDOI
Recent developments in metal-catalyzed living radical polymerization
TL;DR: A short overview of recent developments in metal-catalyzed living radical polymerization, mainly focusing on our recent research studies related to the subject, can be found in this article, where metal catalysts include various transition metals, such as ruthenium, copper, iron and nickel.
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