Synthesis of carbonate‐containing high temperature poly(arylene‐siloxanylenes)

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Abstract
A method for the first synthesis of high molecular weight carbonate‐containing siloxanylene polymers was successfully developed. The procedure covered the preparation and polymerization of pure carbonate‐containing bis‐silanols which included bis(4‐hydroxydimethylsilylphenyl)‐carbonate, bis[4‐(1‐hydroxy‐1,1,3,3‐tetramethyldisiloxanyl)‐phenyl] carbonate, and their meta analogs. Because conventional siloxane polymerization methods, such as the heterocondensation of bis‐silanols with diaminosilanes or homocondensation reactions catalyzed by alkali reagents, decomposed carbonate linkages, a new polymerization technique that involved the use of phosgene was used. The procedure was both facile and effective in the polymerization of other arylene bis‐silanols.