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Features of composites prepared by radical graft‐polymerization of styrene to a hydrophilic macromer adsorbed on ultrafine colloidal particles
Author(s) -
Yoshinaga Kohji,
Nagao Kenichi
Publication year - 1994
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1994.220050607
Subject(s) - materials science , styrene , polymerization , macromonomer , colloid , oxide , radical polymerization , chemical engineering , composite number , adsorption , composite material , polymer , polymer chemistry , copolymer , organic chemistry , chemistry , engineering , metallurgy
Polymer modifications of ultrafine monodispersed colloidal metal oxide particles, smaller than 80 nm in diameter, by the graft‐polymerization of styrene to a hydrophilic macromer adsorbed on the surface were investigated. The polymerization in ethanolic silica and titania colloid solution, which had negatively larger ζ‐potentials, −30 and −42 mV in neutral aqueous solution respectively, gave poly(styrene)–silica or titania composite, being of nonspherical shape. The modifications of colloidal particles, having lower surface energy, such as Al(OH) 3 and CeO 2 –TiO 2 –SiO 2 complex, led to the formation of spherical composites, ranging in size from 500 to 3000 nm, of scattered metal oxide or hydroxide particles.