TY - JOUR A1 - Spange, St. A1 - Müller, H. A1 - Jäger, Christian A1 - Bellmann, C. T1 - Fabrication of carbon/silica hybrid materials using cationic polymerization and the sol-gel process PY - 2002 SN - 1022-1360 SN - 0258-0322 SN - 1521-3900 VL - 177 IS - 1 SP - 111 EP - 124 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-11017 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Meyer, T. A1 - Spange, St. A1 - Hesse, S. A1 - Jäger, Christian A1 - Bellmann, C. T1 - Radical Grafting Polymerization of Vinylformamide with Functionalized Silica Particles N2 - Two different radical polymerization techniques have been applied to covalently graft vinylformamide (VFA) onto silica particles. Grafting by the polymerization of VFA using an immobilized azo initiator on silica has been found less effective, because monomer conversion is limited in non-aqueous solvents and grafting yields are low in water. Radical copolymerization of VFA with vinyltriethoxysilane (VTS)-functionalized silica particles is suitable to produce poly(vinylformamide) (PVFA) silica hybrid particles in respectable yield. The VFA/VTS-silica ratio determines the degree of grafting. The PVFA-VTS-co-grafted silica particles can be acidically hydrolyzed into poly(vinylamine)-grafted silica particles. Molecular structures of the surface groups and grafted polymer chains have been confirmed by means of solid state 13C{1H} cross-polarization magic-angle spinning (CP MAS) NMR spectroscopy. Zeta potential measurements show the altering of the former silica particles surface charges arising from the introduction of basic groups on the surface. KW - Composites KW - Copolymerization KW - Graft copolymers KW - Polyamines KW - Surfaces PY - 2003 DO - https://doi.org/10.1002/macp.200390042 SN - 1022-1352 SN - 1521-3935 VL - 204 IS - 4 SP - 725 EP - 732 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-11019 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -