Results 101 to 110 of about 319 (137)
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Macromolecular Rapid Communications, 2018
AbstractAtom transfer radical polymerization is successfully conducted with an organic semiconductor (OS)‐based visible light activated photocatalyst via a precisely designed catalytic cycle. The living nature of the polymerization by the OS type photocatalyst is proved by the linearly‐increasing molecular weight with consumption of the monomer, the ...
Lei Wang, Run Li, Kai. A.I. Zhang
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AbstractAtom transfer radical polymerization is successfully conducted with an organic semiconductor (OS)‐based visible light activated photocatalyst via a precisely designed catalytic cycle. The living nature of the polymerization by the OS type photocatalyst is proved by the linearly‐increasing molecular weight with consumption of the monomer, the ...
Lei Wang, Run Li, Kai. A.I. Zhang
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Macromolecules, 1998
Transformation of cationic ring-opening polymerization to atom transfer radical polymerization (ATRP) to form AB and ABA type block copolymers was performed. Syntheses of AB type block copolymers initiated by polyTHF (poly(tetramethylene glycol)) containing one bromopropionyl end group were successful for styrene, methyl methacrylate (MMA), and methyl ...
Atsushi Kajiwara +1 more
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Transformation of cationic ring-opening polymerization to atom transfer radical polymerization (ATRP) to form AB and ABA type block copolymers was performed. Syntheses of AB type block copolymers initiated by polyTHF (poly(tetramethylene glycol)) containing one bromopropionyl end group were successful for styrene, methyl methacrylate (MMA), and methyl ...
Atsushi Kajiwara +1 more
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Macromolecular Chemistry and Physics, 2001
Methyl methacrylate has been polymerized by ATRP at 100°C in bulk, in toluene (50%, v/v) and benzonitrile (50% and 25%, v/v), using methyl 2-halopropionate as initiator (MeXPr, X = Cl or Br), copper halide (CuX) as catalyst and 2,2′-bipyridine (bpy) as ligand. The mixed halogen system MeBrPr/CuCl has also been used.
José Luis de la Fuente +3 more
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Methyl methacrylate has been polymerized by ATRP at 100°C in bulk, in toluene (50%, v/v) and benzonitrile (50% and 25%, v/v), using methyl 2-halopropionate as initiator (MeXPr, X = Cl or Br), copper halide (CuX) as catalyst and 2,2′-bipyridine (bpy) as ligand. The mixed halogen system MeBrPr/CuCl has also been used.
José Luis de la Fuente +3 more
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Colloid and Polymer Science, 2013
This study presents styrene emulsion polymerization initiated in aqueous media through an atom transfer radical polymerization (ATRP) mechanism. The water-soluble initiator employed in this process has been synthesized by our team by reacting diethanolamine with α-bromoisobutyryl bromide.
Edina Rusen, Alexandra Mocanu
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This study presents styrene emulsion polymerization initiated in aqueous media through an atom transfer radical polymerization (ATRP) mechanism. The water-soluble initiator employed in this process has been synthesized by our team by reacting diethanolamine with α-bromoisobutyryl bromide.
Edina Rusen, Alexandra Mocanu
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Heterogeneous Catalysts Catalyzed Photo‐Atom Transfer Radical Polymerization (Photo‐ATRP)
Macromolecular Chemistry and PhysicsAbstractPhoto‐ATRP technique has garnered significant attention due to its multitude of advantages, including its ability to be conducted under mild reaction conditions, user‐friendly nature, and exceptional efficiency in polymerization. The heterogeneous photocatalysts not only exhibit exceptional quantum efficiency, but also possess a versatile ...
Guanying Chen +3 more
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Macromolecular Chemistry and Physics, 2000
Dialkylimino- and dialkylaminopyridine complexes of CuBr and FeBr 2 were employed successfully in the atom tranfer radical polymerization (ATRP) of methyl methacrylate, styrene and methyl acrylate. The diiminopyridine ligand formed active catalysis with CuBr and FeBr 2 . The diaminopyridine ligand formed an active catalyst with CuBr. The comparsion of
Bernd Göbelt, Krzysztof Matyjaszewski
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Dialkylimino- and dialkylaminopyridine complexes of CuBr and FeBr 2 were employed successfully in the atom tranfer radical polymerization (ATRP) of methyl methacrylate, styrene and methyl acrylate. The diiminopyridine ligand formed active catalysis with CuBr and FeBr 2 . The diaminopyridine ligand formed an active catalyst with CuBr. The comparsion of
Bernd Göbelt, Krzysztof Matyjaszewski
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Studies of atom transfer radical polymerization (ATRP) of acrylates by MALDI TOF mass spectrometry
Macromolecular Chemistry and Physics, 2000Atom transfer radical polymerization (ATRP) of methyl, butyl and tert-butyl acrylates was studied at conditions when low molecular weight polymers (M n ≅ 2 . 10 3 ) are formed, i.e., at relatively high concentration of initiator (ethyl 2-bromopropionate) and calatyst (CuBr/amine).
Melania Bednarek +2 more
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Carbohydrate Polymers, 2015
Polymerization of styrene (St) and methyl methacrylate (MMA) was performed by surface initiated (SI) and activator generated by electron transfer (AGET) systems of atom transfer radical polymerization (ATRP) using renewable expanded corn starch (ECS) as a support. This prepared ECS is found to have V type crystallinity with 50 m(2)g(-1) surface area (
Ankushi, Bansal +4 more
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Polymerization of styrene (St) and methyl methacrylate (MMA) was performed by surface initiated (SI) and activator generated by electron transfer (AGET) systems of atom transfer radical polymerization (ATRP) using renewable expanded corn starch (ECS) as a support. This prepared ECS is found to have V type crystallinity with 50 m(2)g(-1) surface area (
Ankushi, Bansal +4 more
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1 New catalysts for controlled/living atom transfer radical polymerization (ATRP)
2003Abstract Controlled/living radical polymerization (CRP) is one of the most rapidly developing areas of synthetic chemistry. Atom transfer radical polymerization (ATRP) is the only catalyzed method among CRPs. It enables synthesis of many well-defined polymers with controlled topology, composition and functionality.
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ACS Applied Materials & Interfaces
Light-controlled organic atom transfer radical polymerization (O-ATRP) has emerged as a mature and advanced method for synthesizing well-defined macromolecules. However, developing a high-performance, low-loading, and oxygen-tolerant O-ATRP catalyst system remains an urgent challenge.
Jian Liu, Tao Jiang, Xiang Ma
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Light-controlled organic atom transfer radical polymerization (O-ATRP) has emerged as a mature and advanced method for synthesizing well-defined macromolecules. However, developing a high-performance, low-loading, and oxygen-tolerant O-ATRP catalyst system remains an urgent challenge.
Jian Liu, Tao Jiang, Xiang Ma
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