Упрощенная HTML-версия
of solute molecules, performed thermodynamic analysis of mixtures, for
complex research, proposed structure of the model polymer-inorganic sorbent,
- Results in a boundary curves are summarized in the ternary diagrams
polymer-TMOS-water.
The practical significance and direction:
- Data on the boundary curve that characterize the change in the phase
structure of the formation of organic-inorganic systems based on hydrophilic
polymers, the products of hydrolysis, condensation of TMOS, and can also be
used to develop specific composite materials for different purposes,
- Information on the kinetics of structure formation and the influence of
polymers on the rate of formation of the spatial grid of interest in solving
practical problems, in particular, the choice of formulations and polymeric
components for directional of sol - gel synthesis, to create a hybrid system of a
given structure,
- Changes on the kinetics of the rheological characteristics of the optical
density in aqueous solutions in the stages of gelation, solvent evaporation,
- Data structure - morphological studies of polymer - inorganic
compounds, depending on the composition and ratio nonHMep / (Si
02
) n
components,
- The results of water vapor sorption studies individual components and
blend compositions throughout the range of water vapor pressure (p / ps), and
calculation of thermodynamic characteristics in binary and ternary systems,
- Structuring model stages of its formation and supramolecular
organization of the final composition structure,
- Phase diagrams of ternary systems polymer - adTMOS - water
All studies were performed on films, powders and polymer solutions.
Organic-inorganic hybrid systems. Their synthesis - hybrid system was
performed by mixing an aqueous solution of PVA and PVP with PVK TMOS
content of which ranged from 10 to 90 wt% relative to the polymer. Total initial
concentration of the components in the solution is 2-12 wt%. Mixing was
carried out on a magnetic stirrer for 5-10 min. The solution was then placed in
photocolorimeter cell Ubbelohde capillary viscometer, a petri dish for studying
processes of gelation and phase transformations.
Drying the hydrogel obtained by solvent evaporation was performed under
ambient conditions to constant weight, and then in a desiccator and with
desiccant in a vacuum at a residual pressure of 10 "5 mm Hg.
Filled Polymer - inorganic systems. Mixing aqueous solutions of PVP,
PVA and PVC with aerosil performed long (2-4 hours) stirring the components
using a magnetic stirrer. Aerosil content per polymer ranged from 2 to 30 wt%.
96