Zobrazeno 1 - 10
of 20
pro vyhledávání: '"M. J. Percy"'
Publikováno v:
Langmuir. 21:1175-1179
The internal nanomorphologies of two types of vinyl polymer-silica colloidal nanocomposites were assessed using electron spectroscopy imaging (ESI). This technique enables the spatial location and concentration of the ultrafine silica sol within the
Autor:
M. J. Percy, David P. Randall, Javier Ignacio Amalvy, John F. Watts, S. J. Greaves, S. P. Armes
Publikováno v:
Langmuir. 20:2184-2190
The surfactant-free synthesis of vinyl polymer-silica nanocomposite particles has been achieved in aqueous alcoholic media at ambient temperature in the absence of auxiliary comonomers. Styrene, methyl methacrylate, methyl acrylate, n-butyl acrylate,
Publikováno v:
Langmuir. 19:2072-2079
The surfactant-free synthesis of colloidal dispersions of vinyl polymer−silica nanocomposite particles in aqueous media using a batch emulsion polymerization protocol has been previously described [Percy, M. J.; et al. Langmuir 2000, 16, 6913]. In
Autor:
Christian Perruchot, M. J. Percy, Michael A. Khan, Steven P. Armes, M.J. Willis, Mark J. Burchell
Publikováno v:
Planetary and Space Science. 50:1025-1035
Results for electrostatic acceleration of organic, silica- and metal-based micro-projectiles ( μm diameter) are presented. These micro-projectiles, which are mimics for cosmic dust, are accelerated by using a conducting polymer (polypyrrole or polya
Autor:
M. J. Percy, S. P. Armes
Publikováno v:
Langmuir. 18:4562-4565
The surfactant-free synthesis of poly(methyl methacrylate)−silica nanocomposite particles has been achieved in aqueous alcoholic media at ambient temperature without the use of auxiliary comonomers. Stable colloidal dispersions with reasonably narr
Publikováno v:
Langmuir. 17:4770-4778
We report the surfactant-free synthesis of new, film-forming vinyl polymer/silica colloidal nanocomposites by copolymerization of 4-vinylpyridine (4VP) with either n-butyl acrylate (n-BuA) or n-butyl methacrylate (n-BuMA) in the presence of an ultraf
Autor:
Mohammed A. Khan, M. J. Percy, Stuart F. Lascelles, Maria Vamvakaki, C. Barthet, Steven P. Armes, J C Lobb
Publikováno v:
Langmuir. 16:6913-6920
Colloidal dispersions of polymer−silica nanocomposite particles were synthesized in high yield by homopolymerizing 4-vinylpyridine (4VP) in the presence of an ultrafine silica sol using a free-radical initiator in aqueous media at 60 °C. Copolymer
Publikováno v:
Journal of Materials Chemistry. 9:499-505
The influence of low ligand/Zr mole ratios (ρ=0-0.1) of acetylacetone on the hydrolysis of Zr(OPr n ) 4 has been examined by investigating its effect on the induction time (t i ) before precipitation commences in the system. A remarkable feature of
Publikováno v:
Journal of Sol-Gel Science and Technology. 2:215-220
The formation of zirconia colloids by hydrolysing zirconium n-propoxide in n-propanol has been investigated by simultaneous, multi-angle static and dynamic light scattering, and vibrational spectroscopy, as a function of reactant concentration, water
Publikováno v:
Inorganic Chemistry. 32:3408-3411
Electrospray mass spectrometric (ESMS) studies have been made on some representative examples of the trinuclear complexes [M 3 O(RCOO) 6 (H 2 O) 3 ] + (M=Cr, Fe; R=H, CH 3 , CH 3 CH 2 , (CH 3 ) 3 C) in methanol and pyridine/ methanol solutions. The n