Results 261 to 270 of about 22,210 (290)

How are Radicals (Re)Generated in Photochemical ATRP?

Journal of the American Chemical Society, 2014
The 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.
Krzysztof Matyjaszewski, Dominik Konkolewicz, Stefan Bernhard, Thomas G. Ribelli   +3 more
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Photoinduced ATRP of acrylonitrile with aniline as photoinitiator

Journal of Macromolecular Science, Part A, 2016
ABSTRACTPhoto-mediated atom transfer radical polymerization (ATRP) of acrylonitrile (AN) was carried out at 25°C in N,N-dimethyl formamide (DMF) with aniline as photoinitiator. Polyacrylonitrile (PAN) with predictable average molecular weight and narrow molecular weight distribution was synthesized with 2-Bromopropionitrile (BPN) as ATRP initiator and ...
Zhao-Hui Hou, Hu Wu, Li-Chao Liu, Bin-Hong He, Enxiang Liang, Guo-Xiang Wang, Ming Zhong, Yan Huang   +7 more
openaire   +2 more sources

Thermoresponsive biohybrid materials synthesized by ATRP

Journal of Materials Chemistry, 2007
The aqueous phase behaviour of poly(N-isopropylacrylamide)–protein conjugates prepared by atom transfer radical polymerization (ATRP) is reported.
Dayanara P. Parra, Vimary Vázquez-Dorbatt, Karina L. Heredia, Ronald C. Li, Heather D. Maynard   +4 more
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Rate‐enhanced ATRP in the presence of catalytic amounts of base: An example of iron‐mediated AGET ATRP of MMA

Journal of Polymer Science Part A: Polymer Chemistry, 2011
AbstractThe catalytic amount of inorganic bases (i.e., NaOH, Na3PO4, NaHCO3, and Na2CO3) and organic bases such as pyridine and triethylamine was used as the additives in an iron‐mediated atom transfer radical polymerization with activators generated by electron transfer (AGET ATRP) of a polar monomer methyl methacrylate (MMA) using FeCl3·6H2O as the ...
Nianchen Zhou, Zhengbiao Zhang, Zhenping Cheng, Xiulin Zhu, Lifen Zhang, Liangjiu Bai, Jian Zhu   +6 more
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Diselenocarbamates, novel initiators in ATRP of styrene

Journal of Polymer Science Part A: Polymer Chemistry, 2015
ABSTRACTThe atom transfer radical polymerizations (ATRPs) of styrene initiated by diselenocarbamates were carried out for the first time. The polymerization showed first‐order kinetic with respect to the monomer concentration, and the molecular weights of the obtained polymers increased linearly with the monomer conversions with narrow molecular weight
Xiulin Zhu, Zhengbiao Zhang, Feng Gao, Wei Zhang, Jian Zhu, Xiangqiang Pan   +5 more
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Synthesis and characterization of novel glycosurfaces by ATRP

Soft Matter, 2009
The direct synthesis of well defined sugar methacrylate-based homopolymer brushes with high grafting densities based on D-gluconamidoethyl methacrylate (GAMA) and 2-lactobionamidoethyl methacrylate (LAMA) from functionalized gold substrates was carried out using surface-initiated atom transfer radical polymerization (ATRP).
Jianding Ye, Maria Vamvakaki, Maria Vamvakaki, Anca Mateescu, Anca Mateescu, Ravin Narain   +5 more
openaire   +2 more sources

SARA ATRP or SET-LRP. End of controversy?

Polymer Chemistry, 2014
A debate has proceeded in the literature regarding the mechanism of reversible-deactivation radical polymerization in the presence of Cu0. The two proposed models are supplemental activator and reducing agent atom transfer radical polymerization (SARA ATRP) and single electron transfer living radical polymerization (SET-LRP).
Dominik Konkolewicz, Yu Wang, Pawel Krys, Mingjiang Zhong, AHMED ISSE, ABDIRISAK, GENNARO, ARMANDO, Krzysztof Matyjaszewski   +6 more
openaire   +2 more sources

Contribution of Photochemistry to Activator Regeneration in ATRP

Macromolecules, 2014
With the recent interest in photochemically mediated atom transfer radical polymerization (ATRP), an interesting question arises: how significant are the photochemical processes in ATRP reactions that are supposed to be chemically controlled, such as initiators for continuous activator regeneration (ICAR) ATRP?
Xiangcheng Pan, Dominik Konkolewicz, Krzysztof Matyjaszewski, Thomas G. Ribelli   +3 more
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Electrochemically mediated ATRP of acrylamides in water

Polymer, 2015
Abstract Electrochemically mediated atom transfer radical polymerization (eATRP) of acrylamide was investigated in aqueous media. The synthesis of poly(ethylene oxide)-block-poly(acrylamide) block copolymers via eATRP under potentiostatic conditions was carried out.
Antonina Simakova, Sangwoo Park, Paweł Chmielarz, Paweł Chmielarz, Krzysztof Matyjaszewski   +4 more
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Two decades of molecular brushes by ATRP

Polymer, 2015
Abstract This review presents the development of brush copolymers as macromolecular engineering materials prepared by atom transfer radical polymerization (ATRP) and reported by the Matyjaszewski's group during the last twenty years. The graft structures combine different segments which allowed to precisely design properties of macromolecules to ...
openaire   +2 more sources