Thermal transformations of polydimethylsilethyne into ceramic product

The thermolysis of [-Si-(CH3)(2)C=C-](n) under vacuum and argon to 1400 degrees C gives silicon carbide containing ceramics. The polymer-ceramics transition was studied using the thermal analysis, infrared spectroscopy, solid-state Si-29 NMR spectroscopy, X-ray diffraction analyses, SEM analysis. The schemes of cross-polymerization of [-Si-(CH3)(2)C=C-](n) are discussed. A distinctive feature of polydimethylsilethyne is the presence of crystal phase conserving its stability up to 600 degrees C which is the starting point of the transition from organic to inorganic material.