title: Silica-polymethacrylate hybrid particles synthesized using high-pressure atom transfer radical polymerization.
abstract: Hybrid nanoparticles with a silica core and grafted poly(methyl methacrylate) (PMMA) or poly(n-butyl methacrylate) (PBMA) chains were prepared via activators generated by electron transfer for atom transfer radical polymerization (AGET ATRP) at room temperature under high pressure. Due to enhanced propagation rate constant and reduced termination rate constant for polymerizations conducted under high pressure, the rate of polymerization was increased, while preserving good control over polymerization when compared to ATRP under ambient pressure. Molecular weights of greater than 1 million were obtained. The PMMA and PBMA brushes exhibited "semi-diluted" or "diluted" brush architecture with the highest grafting densities ≈0.3 chain·nm(-2).
authors: Institute of Polymer and Dye Technology, Technical University of Lodz, ul Stefanowskiego 12/16, 90-924 Lodz, Poland. joanna.pietrasik@p.lodz.pl
authors: Joanna
authors: J
authors: Pietrasik
authors: Chin Ming
authors: CM
authors: Hui
authors: Wojciech
authors: W
authors: Chaladaj
authors: Hongchen
authors: H
authors: Dong
authors: Jihoon
authors: J
authors: Choi
authors: Janusz
authors: J
authors: Jurczak
authors: Michael R
authors: MR
authors: Bockstaller
authors: Krzysztof
authors: K
authors: Matyjaszewski
mesh_terms: D005609:Free Radicals / Q000737:chemistry*; D007700:Kinetics; D015394:Molecular Structure; D008970:Molecular Weight; D053758:Nanoparticles; D058105:Polymerization; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D011312:Pressure; D012822:Silicon Dioxide / Q000737:chemistry*; D013696:Temperature
chemical_list: D005609:Free Radicals; D011108:Polymers; D011109:Polymethacrylic Acids; D012822:Silicon Dioxide; C068872:polybutyl methacrylate; D019904:Polymethyl Methacrylate