Solid Polymer Electrolyte Membranes on the Basis of Fluorosiloxane Matrix

Hydrosilylation reactions of 2,4,6,8-tetrahydro-2,4,6,8-tetramethylcyclotetrasiloxane (D4H) with 2,2,3,3,4,4,5,5-octafluoropentyl acrylate at 1:4.2 ratio of initial compounds catalysed by platinum catalysts have been studied and corresponding adduct D4R' has been obtained. Ring opening polymerization of D4R in the presence of dry potassium hydroxide has been carried out and comb-type polymers with 2,2,3,3,4,4,5,5-octafluoropentyl propionate side groups have been obtained.

Fluorine-Containing Siloxane Based Polymer Electrolyte Membranes

The hydrosilylation reaction of 2,4,6,8-tetrahydro-2,4,6,8-tetramethylcyclotetrasiloxane (D4H) with 2,2,3,3-tetrafluoropropyl acrylate and vinyltriethoxysilane in the presence of platinum catalysts (platinum hydrochloric acid, Karstedt’s catalysts and Pt/C (10%) at 323 K) has been carried out and corresponding addition adduct (D4R,R‘) has been obtained. The synthesized product D4R,R was analyzed by FT-IR, 1H, 13C, and 29Si NMR spectroscopy.

Interpenetrating Network on the Basis of Methylcyclotetrasiloxane Matrix

Hydrosilylation reaction of 2,4,6,8-tetrahydro-2,4,6,8-tetramethylcyclotetra siloxane (D4H) allyl trifluoroacetate and vinyltriethoxysilane catalysed by platinum catalysts has been studied.The synthesized D4R,R' was analyzed with FTIR, 1H, 13C, and 29Si NMR spectroscopy. Via sol-gel reactions of D4R,R' systems doped with lithium trifluoromethylsulfonate (triflate) solid polymer electrolyte membranes have been obtained. It has been found that the electric conductivity of the polymer electrolyte membranes at room temperature changes in the range of (4•10-5)–(6•10-7) S/cm.