Results 181 to 190 of about 10,606 (223)
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Dope new organocatalysts for ATRP
Nature Reviews Chemistry, 2021A re-evaluation of the design principles of organocatalysts for atom transfer radical polymerization has led to the development of heteroatom-doped polycyclic arenes as highly active photocatalysts.
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Kinetic Modeling of Normal ATRP, Normal ATRP with [CuII]0, Reverse ATRP and SR&NI ATRP
Macromolecular Theory and Simulations, 2008AbstractThe kinetics of various ATRP systems, including normal ATRP, normal ATRP in the presence of initiallyâadded CuII, reverse ATRP and SR&NI ATRP were modeled using Predici software. The instantaneous kinetic chain length was introduced for ATRP and was used for the prediction of control over polymerization.
Wei Tang, Krzysztof Matyjaszewski
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Macromolecules, 2012
Activators regenerated by electron transfer atom transfer radical polymerization (ARGET ATRP) was successfully implemented in aqueous media for the first time. A well-controlled polymerization of oligo(ethylene oxide) methyl ether methacrylate (OEOMA) was conducted with 300 ppm or lower of a copper catalyst and tris(2-pyridylmethyl)amine (TPMA) ligand ...
Antonina Simakova +3 more
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Activators regenerated by electron transfer atom transfer radical polymerization (ARGET ATRP) was successfully implemented in aqueous media for the first time. A well-controlled polymerization of oligo(ethylene oxide) methyl ether methacrylate (OEOMA) was conducted with 300 ppm or lower of a copper catalyst and tris(2-pyridylmethyl)amine (TPMA) ligand ...
Antonina Simakova +3 more
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High Molecular Weight PMMA by ATRP
Macromolecules, 2002Atom transfer radical polymn. kinetics was examd. in a high monomer-initiator ratio system to evaluate the possibility of obtaining low polydispersity high mol. wt. polymethyl methacrylate by a one-pot synthesis. Three different ligands were examd., N,N,N',N\",N\"-pentamethyldiethyltriamine (PMDETA), 4,4'-n-nonyl-2,2'-bipyridine, (dnNbpy,) and 2 ...
Xue, L., Agarwal, U.S., Lemstra, P.J.
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ACS Catalysis, 2020
Despite over two decades of research, butadiene (BD) remains one of the most challenging monomers for atom transfer radical polymerization (ATRP).
Hyun-Seok Yu +4 more
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Despite over two decades of research, butadiene (BD) remains one of the most challenging monomers for atom transfer radical polymerization (ATRP).
Hyun-Seok Yu +4 more
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Making ATRP More Practical: Oxygen Tolerance
Accounts of Chemical Research, 2021Atom-transfer radical polymerization (ATRP) is a well-known technique for the controlled polymerization of vinyl monomers under mild conditions. However, as with any other radical polymerization, ATRP typically requires rigorous oxygen exclusion, making it time-consuming and challenging to use by nonexperts.
Grzegorz Szczepaniak +4 more
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Mechanism of Halogen Exchange in ATRP
Macromolecules, 2011Detailed mechanistic studies reveal that halogen exchange (HE) in ATRP can occur not only by a radical pathway (atom transfer) but also by an ionic pathway (SN2 reaction) because Cu(I)(L)X and Cu(I...
Chi-How Peng +3 more
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2014
This review summarizes the recent progress on the synthesis and application of covalently crosslinked hydrogels prepared using atom transfer radical polymerization (ATRP) technique. ATRP has been employed as an effective means to synthesize well-controlled polymeric materials with narrow molecular weight distributions, compositions, chain-end ...
Haifeng Gao +3 more
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This review summarizes the recent progress on the synthesis and application of covalently crosslinked hydrogels prepared using atom transfer radical polymerization (ATRP) technique. ATRP has been employed as an effective means to synthesize well-controlled polymeric materials with narrow molecular weight distributions, compositions, chain-end ...
Haifeng Gao +3 more
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Journal of Nanoscience and Nanotechnology, 2016
Oligo(ethylene glycol) methacrylate (OEGMA) was polymerized from a polymerization initiator-presenting gold substrate by Activator ReGenerated by Electron Transfer Atom Transfer Radical Polymerization (ARGET ATRP) in water. Compared with the normal surface-initiated ATRP (SI-ATRP), SI-ARGET ATRP of OEGMA proceeded smoothly in the presence of air with L-
Bong Soo, Lee +4 more
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Oligo(ethylene glycol) methacrylate (OEGMA) was polymerized from a polymerization initiator-presenting gold substrate by Activator ReGenerated by Electron Transfer Atom Transfer Radical Polymerization (ARGET ATRP) in water. Compared with the normal surface-initiated ATRP (SI-ATRP), SI-ARGET ATRP of OEGMA proceeded smoothly in the presence of air with L-
Bong Soo, Lee +4 more
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How are Radicals (Re)Generated in Photochemical ATRP?
Journal of the American Chemical Society, 2014The polymerization mechanism of photochemically mediated Cu-based atom-transfer radical polymerization (ATRP) was investigated using both experimental and kinetic modeling techniques. There are several distinct pathways that can lead to photochemical (re)generation of Cu(I) activator species or formation of radicals.
Thomas G, Ribelli +3 more
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