Comb-type Methyl Propionate group Containing Siloxanes For Polymer Electrolyte Membranes

Author: Omar Mukbaniani
Co-authors: Natia Jalagonia, Tamar Tatrishvili, Eliza Markarashvili, Izabela Esartia, Donari Otiashvili, Jimsher Aneli
Keywords: Hydrosilylation, polymerization, solid polymer electrolyte membranes, ion-conductivity
Annotation:

The synthesis of comb-type polymers have been realized in two stages. On the first stage hydrosilylation reaction of 2.4.6.8-tetrahydro-2.4.6.8-tetramethylcyclotetrasiloxane (D4H) with methyl acrylate at 1:4.1 ratio of initial compounds as well as with methyl acrylate and vinyltriethoxysilane at 1:3:1 ratio of initial compounds, in the presence of various platinum catalyst at a 60-80 0C temperature have been carried out. D4R and D4R,R' organocyclotetrasiloxanes have been synthesized in a quantitative yield. Via polymerization and copolymerization reactions of organocyclotetrasiloxanes D4R and D4R,R' with molecular weight regulated agent hexamethyldisiloxane, have been investigated at 80-1000C temperature in the presence of anhydrous potassium hydroxide and well soluble comb-type polymers with regular structure have been obtained. The composition and structure of the synthesized substances have been determined via FTIR, 29Si, 1H and 13C NMR spectra data. Via sol-gel processes of polymers with various amount of lithium trifluoromethylsulfonate (triflate) and 1-2 drop of 0.1 M HCl alcohol solution the solid polymer electrolyte membranes have been obtained.