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
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Book ChapterDOI
Nanostructure Formation in Block Copolymers
TL;DR: In this paper, a variety of different synthetic strategies for preparation of linear diblock copolymers by anionic polymerization is examined, including star block copolym, graft copolymer, miktoarm star copolymon, cyclic block copylomer, and other complex architectures, which are characterized by a slow rate of intermicellar chain exchange.
Journal ArticleDOI
Synthesis of poly(epichlorohydrin‐g‐methyl methacrylate) graft copolymers by the combination of cationic and atom transfer radical polymerization
Ismail Cakmak,Haci Baykara +1 more
TL;DR: In this paper, the authors used poly(epichlorohydrin) possessing chloromethyl side groups in the main chain in the atom transfer radical polymerization of methyl methacrylate and styrene.
Journal ArticleDOI
Synthesis of poly(fluorinated styrene)-block-poly(ethylene oxide) amphiphilic copolymers via atom transfer radical polymerization: potential application as paper coating materials
TL;DR: In this article, an amphiphilic block copolymer was synthesized by atom transfer radical polymerization (ATRP) technique, which was carried out in bulk and catalysed by copper(I) chloride in the presence of 2,2′-bipyridine ligand.
Journal ArticleDOI
Synthesis of polypropylene block copolymers from brominated styrene-terminated isotactic polypropylene
TL;DR: In this paper, a brominated styrene-terminated isotactic polypropylene macroinitiator was used to synthesize a block copolymer, which can be obtained by polymerization of propylene in the presence of styrene and hydrogen chain transfer agents using a rac-Me2Si[2-methyl-4-(1-naphyl)Ind]2ZrCl2 as catalyst.
Journal ArticleDOI
Modeling of the Methyl Methacrylate Atom Transfer Radical Suspension Polymerization Process: Polymerization and Particle Kinetics
Le Xie,Zheng-Hong Luo +1 more
TL;DR: In this article, a mathematical model is developed to characterize the batch atom transfer radial suspension polymerization (batch suspension ATRP), and the morphological and molecular properties of particles, as well as their dynamics in methyl methacrylate ATRP can be simultaneously simulated by solving the model that consists of ATRP kinetic equations, moment equations, a phase equilibrium equation for calculating equilibrium monomer disributions in various phases, and a particle population balance model.
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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