Results 251 to 260 of about 44,944 (293)

Microfluidically mediated atom-transfer radical polymerization

Chemical Communications, 2019
Microfluidically mediated atom-transfer radical polymerization can be used to fabricate polymer brushes with a controlled gradient.
Chengtao Zhang, Luxiang Wang, Dianzeng Jia, Junfeng Yan, Hongyi Li   +4 more
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A Chaperonin as Protein Nanoreactor for Atom‐Transfer Radical Polymerization

Angewandte Chemie International Edition, 2013
AbstractThe group II chaperonin thermosome (THS) from the archaea Thermoplasma acidophilum is reported as nanoreactor for atom‐transfer radical polymerization (ATRP). A copper catalyst was entrapped into the THS to confine the polymerization into this protein cage. THS possesses pores that are wide enough to release polymers into solution.
Renggli, Kasper, Nussbaumer, Martin G., Urbani, Raphael, Pfohl, Thomas, Bruns, Nico   +4 more
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Fundamentals of Atom Transfer Radical Polymerization

Journal of Chemical Education, 2010
Today’s market increasingly demands sophisticated materials for advanced technologies and high-value applications, such as nanocomposites, optoelectronic, or biomedical materials. Therefore, the demand for well-defined polymers with very specific molecular architecture and properties increases.
Veerle M. C. Coessens, Krzysztof Matyjaszewski   +1 more
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Copper Nanodrugs by Atom Transfer Radical Polymerization

Angewandte Chemie International Edition
AbstractIn this study, some copper catalysts used for atom transfer radical polymerization (ATRP) were explored as efficient anti‐tumor agents. The aqueous solution of copper‐containing nanoparticles with uniform spheric morphology was in situ prepared through a copper‐catalyzed activator generated by electron transfer (AGET) ATRP in water ...
Peng Chen, Ziyan Song, Xuxia Yao, Weibin Wang, Lisong Teng, Krzysztof Matyjaszewski, Weipu Zhu   +6 more
openaire   +2 more sources

Atom transfer radical polymerization of acrylonitrile

Journal of Applied Polymer Science, 2005
AbstractIron(II) chloride coordinated by succinic acid was first used as the catalyst in 2‐chloropropionitrile‐initiated atom transfer radical polymerization (ATRP) of acrylonitrile. N,N‐dimethylformamide was used as a solvent to improve the solubility of the ligand.
Chen Hou, Liang Ying, Chengguo Wang
openaire   +1 more source

Dithioesters in atom-transfer radical polymerization

Polymer Science Series B, 2006
Phenyl dithioacetates and bis(isobutyl) dithiocarbamates of Cu(II) and Ti(IV) were studied as chain-transfer agents in the controlled free-radical polymerization of methyl methacrylate and styrene. It was shown that the above compounds strongly decelerate the polymerization of at least one of the monomers.
Yu. A. Kabachii, S. Yu. Kochev, P. M. Valetski   +2 more
openaire   +1 more source

Radical Nature of Cu-Catalyzed Controlled Radical Polymerizations (Atom Transfer Radical Polymerization)

Macromolecules, 1998
Copper-catalyzed atom transfer radical polymerization (ATRP) is one of the most robust and precise techniques for controlling radical polymerization. The very good control of molecular weights, polydispersities, functionalities, chain composition, and topologies unusual for radical systems combined with the application of transition metals as catalysts
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Oxygen-Driven Atom Transfer Radical Polymerization

Journal of the American Chemical Society
In traditional atom transfer radical polymerization (ATRP), oxygen must be meticulously eliminated due to its propensity to quench radical species and halt the polymerization process. Additionally, oxygen oxidizes the lower-valent Cu catalyst, compromising its ability to activate alkyl halides and propagate polymerization.
Yuxuan Du, Zhe Chen, Zhikang Xie, Siyu Yi, Krzysztof Matyjaszewski, Xiangcheng Pan   +5 more
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Stereoregular Polymerization of Methylmethacrylate by Atom Transfer Radical Polymerization

Journal of Macromolecular Science, Part A, 2006
Methyl methacrylate (MMA) was polymerized by the atom transfer radical polymerization (ATRP) method to obtain living low molecular weight polymers. The initiator was p‐toluenesulfonylchloride and the catalyst ligand complex system was CuCl‐4,4′ dimethyl 2,2′bipyridine. Polymers with controlled molecular weight were obtained.
Bengi Aran, Ali Usanmaz
openaire   +1 more source

Polymerization of Substituted Styrenes by Atom Transfer Radical Polymerization

Macromolecules, 1997
A series of substituted styrenes were polymerized by controlled/“living” radical polymerization using atom transfer radical polymerization (ATRP), in order to correlate monomer structures with polymerization rate. The effect of substituents is discussed with regard to the Hammett equation.
Jian Qiu, Krzysztof Matyjaszewski
openaire   +1 more source