Syntheses and Properties of Silicon-containing, Soluble and Fully Aromatic Polymers

Abstract

In order to obtain excellently heat-resistant and transparent polymer materials, the fully aromatic polysilarylenesiloxanes were synthesized via the solution polymerization and the melt-condensation from the corresponding disilanol monomer. And the thermal properties of these polymers were investigated by using DSC and TGA. The polymer synthesized via the solution polymerization showed good solubility in various organic solvents, and 116℃ of glass transition temperature, T_g, and 529℃ of 5% weight loss temperature, T_d5. On the other hand, the product obtained by the melt-condensation polymerization partially dissolved in organic solvent, and showed 93℃ of T_g. Polyaryleneoxysiloxane was also prepared from 4,4’-dihydroxytetraphenylmethane and dichlorodiphenylsilane, and showed 137℃ of T_g, while polyaryleneoxysiloxane was easily hydrolyzed in homogeneous solution containing a base etc.