Silicate layers, intercalating synthesis

Emulsion polymerization intercalation is an alternative method of PCN synthesis. This method is similar to in situ polymerization, but has several differences and limitations. In the emulsion polymerization method, micelle helps the polymer to be monodisperse, yet the micelles are limited in their ability to penetrate into the layer. Nonetheless, this method is attractive because of its use of a micelle as a targeted material, which helps the monomer or prepolymer to penetrate into the silicate layers. 

Another method for the intercalation of metalloporphy-rins into clays has been explored using porphyrins and metalloporphyrins as organic templates in the hydrothermal synthesis of layered silicates. X-ray powder-diffraction data indicate that the porphyrins are intercalated parallel to the silicate layers. Microanalysis and UV-visible diffuse-reflectance spectra indicate that the porphyrins are incorporated intact. 

Vaia, R.A., Ishii, H. and Giannelis, E.P. 1993. Synthesis and properties of two dimensional nanostructures by direct intercalation of polymer melts in layered silicates. Chemistry of Material 5 1694-1696. 

MePOR species and other complexes in cationic clays can be located at the edges of packed platelets, in the interlamellar space or in the mesopores present (Scheme 10.9). A review of the early data in this area is available.[86] The flat metallo macrocycles under clay synthesis conditions help to induce layer silicate formation, the complexes being intercalated between the layers. Whereas with monooxygen atom donors, alkanes can be oxygenated with significantly enhanced activities compared with the homogeneous case, in every case the expected products (ol/on) were obtained. Competitive oxygenation of adamantane and pentane shows lower... 

The synthesis of polymer nanocomposites is an integral aspect of polymer nanotechnology. By inserting the nanometric inorganic compounds, the properties of polymers improve and hence this has a lot of applications depending upon the inorganic material present in the polymers. The improvements obtained in day/PP nanocomposite structure can make this commercial thermoplastic polymer more suitable for automotive, construction and packaging applications. Different alkyl ammonium surfactants and compatibilizer was used to produce layered silicate/PP nanocomposites by the same melt intercalation technique. 

Direct Synthesis of Novel Intercalated Layer Silicates of the Metal Silicate Type... 

---