Efficient metal-free coupling of polystyrene chains using silane radical atom abstraction

Polystyrene/Clay Nanocomposites by Atom Transfer Radical Nitroxide Coupling Chemistryy

Muhammed Aydin, Mehmet Atilla Tasdelen, Tamer Uyar, Steffen Jockusch, Nicholas J. Turro,4,z Yusuf Yagci Department of Chemistry, Faculty of Science and Letters, Istanbul Technical University, Maslak, TR-34469 Istanbul, Turkey Department of Polymer Engineering, Faculty of Engineering, Yalova University, TR-77100 Yalova, Turkey UNAM-Institute of Materials Science and Nanotechnology, Bilkent Unive...

Metal-free atom transfer radical polymerization.

Overcoming the challenge of metal contamination in traditional ATRP systems, a metal-free ATRP process, mediated by light and catalyzed by an organic-based photoredox catalyst, is reported. Polymerization of vinyl monomers are efficiently activated and deactivated with light leading to excellent control over the molecular weight, polydispersity, and chain ends of the resulting polymers. Signifi...

Nitroxide-Mediated Radical Polymerization of Styrene Initiated from the Surface of Titanium Oxide Nanoparticles

Titanium dioxide (TiO2) nanoparticles, with an average size of about 45 nm, were encapsulated by polystyrene using in situ nitroxide mediated radical polymerization   in the presence of 3-aminopropyl triethoxy silane (APTES) as a coupling agent and 2, 2, 6, 6-tetramethylpiperidinyl-1-oxy  as a initiator. First, the initiator for NMRP was covalently bonded onto the surface of Titanium dioxide na...

[Silane coupling agents].

Highly Efficient Arsenic Removal Using a Composite of Ultrafine Magnetite Nanoparticles Interlinked by Silane Coupling Agents

Arsenic (As) contamination in groundwater is a great environmental health concern and is often the result of contact between groundwater and arsenic-containing rocks or sediments and from variation of pH and redox potentials in the subsurface. In the past decade, magnetite nanoparticles (MNPs) have been shown to have high adsorption activity towards As. Alerted by the reported cytotoxicity of 5...