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The preparation of reversibly softening polymers and copolymers of phenylsilsesquioxane in a one-step synthesis has been studied. The synthetic methods are based on hydrolytic polycondensation of PhSiCl3 or copolycondensation of PhSiCl3 with Ph2SiCl2 using moistened or hydrated salts: (1) moistened Na2CO3, K2CO3, (2) Na2B4O7·10H2O, (3) Na3PO4·12H2O. Syntheses (1) and (2) gave products as reversibly...
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