PMMA-based composite materials with reactive ceramic fillers. Part1.—Chemical modification and characterisation of ceramicparticles

Polymerisable organic silane molecules [3-(trimethoxysilyl)propyl methacrylate, γ-MPS] have been grafted onto the surface of ceramic oxide powders (Al 2 O 3 , ZrO 2 , TiO 2 ), via hydroxy groups of the latter oxides, in order to obtain organic–inorganic hybrid ‘macromonomers’. Densities of surface hydroxy groups have been determined using thermogravimetry (TG) and chemical titration. Quantification of γ-MPS grafting has been determined by FTIR spectroscopy, elemental analysis and TG. Typical grafting yields up to 6 µmol m -2 were obtained. The influence of the relative amount of silane used has been studied. Silane multilayers and/or aggregates are formed as observed in 29 Si CP MAS NMR spectroscopy.

[1]  R. Denoyel,et al.  Adsorption of (.gamma.-Aminopropyl)triethoxysilane on Silica from Aqueous Solution: A Microcalorimetric Study , 1995 .

[2]  E. Greener,et al.  Effects of coupling agents on mechanical properties of metal oxide-polymethacrylate composites. , 1994, Journal of dentistry.

[3]  P. Cousin,et al.  Dynamic mechanical properties of sulfonated polystyrene/alumina composites , 1994 .

[4]  T. Bein,et al.  Surface reactions on thin layers of silane coupling agents , 1993 .

[5]  J. Pesek,et al.  New Alumina-Based Stationary Phases for High-Performance Liquid Chromatography. Synthesis by Olefin Hydrosilation on a Silicon Hydride Modified Alumina Intermediate , 1993 .

[6]  T. A. Dang,et al.  Quantification of surface hydroxides using chemical labeling and XPS , 1992 .

[7]  E. Carlier,et al.  Functional polymers supported on porous silica: I. Grafting active precursors onto porous silica , 1991 .

[8]  N. Tsubokawa,et al.  Surface grafting of polymers onto inorganic ultrafine particles: Reaction of functional polymers with acid anhydride groups introduced onto inorganic ultrafine particles , 1991 .

[9]  M. Shimomura,et al.  Graft Polymerization of Vinyl Monomers from Inorganic Ultrafine Particles Initiated by Azo Groups Introduced onto the Surface , 1990 .

[10]  N. Tsubokawa,et al.  Grafting of polyesters from ultrafine inorganic particles: Copolymerization of epoxides with cyclic acid anhydrides initiated by COOK groups introduced onto the surface , 1990 .

[11]  J. Pesek,et al.  Evaluation of synthetic procedures for the chemical modification of alumina for HPLC , 1989 .

[12]  M. Shimomura,et al.  Graft Polymerization of Acrylamide from Ultrafine Silica Particles by Use of a Redox System Consisting of Ceric Ion and Reducing Groups on the Surface , 1989 .

[13]  E. Baumgarten,et al.  Quantitative determination of hydroxyl groups on alumina by IR spectroscopy , 1989 .

[14]  J. J. Ponjee,et al.  Characterization of modified silica powders by fourier transform infrared spectroscopy and cross-polarization magic angle spinning NMR , 1986 .

[15]  H. Ishida.  A review of recent progress in the studies of molecular and microstructure of coupling agents and their functions in composites, coatings and adhesive joints , 1984 .

[16]  É. Lippmaa,et al.  Solid-state high-resolution silicon-29 chemical shifts in silicates , 1984 .

[17]  F. O. Stark,et al.  Evidence for Chemical Bond Formation at Silane Coupling Agent Interfaces , 1967 .

[18]  Masao Satō,et al.  Hydroxyl groups on silica, alumina, and silica-alumina catalysts , 1967 .

[19]  W. Hall.  Studies of the hydrogen held by solids: VI. The hydroxyl groups of alumina and silica-alumina as catalytic sites , 1964 .

[20]  C. Chu,et al.  Interactions of aminosilane with alumina and silica substrates deposited from nonaqueous and aqueous media , 1993 .

[21]  J. V. Veen,et al.  A method for the quantitative determination of the basic, acidic, and total surface hydroxy content of TiO2 , 1985 .

[22]  P. Ratnasamy,et al.  Catalytic Aluminas: Surface Models and Characterization of Surface Sites , 1978 .

[23]  J. Knox,et al.  Performance and selected applications of a new range of chemically bonded packing materials in high-performance liquid chromatography , 1975 .

[24]  J. Kardos,et al.  The interaction of alkoxy silane coupling agents with silica surfaces , 1971 .