Composition and Structure of Spatial Polychromoorganylsiloxanes

The interaction of polyvinylsilsesquioxane (PVS) and polyvinyl,-polydimethylsiloxane with tris(3-chlorosulfenyl-2,4-pentanedionate) chromium was investigated. During the reaction, gels were obtained, after drying of which dark purple substances were isolated. The composition and structure of these substances were studied for the first time using thermogravimetry, diffractometry and positron annihilation spectroscopy (PAS). The densities of metallochelate polymers were found pycnometrically, and according to diffractometry data, it was revealed that the connection products are spatial reticular mesomorphic polymers with a fractal structure. Using the PAS data, it was concluded that there is a direct correlation between the volume of the positronium trap and the coherent scattering region (CSR) determined using X-ray diffraction. Based on the regular decrease in the interplane distance when introducing a chromium atom into the silsesquioxane chain, it was found that the synthesized polymetallorganosiloxanes have a different structure in comparison with typical representatives of this class of compounds. For a product with polyvinylsiloxane, enlarged SEM images were obtained and the morphology of the initially formed gel and dried solid powder was described.