Pyrolysis of Poly(diphenylsilylene-co-methylene)

Abstract

The synthesis of poly(diphenylsilylene-co-methylene) of the general composition [SiPh₂(CH₂)₁,₁]_x was afforded by the reaction of diphenyldichlorosilane and dibromomethane with sodium. The product obtained was characterized by elemental analysis and by ¹H, ¹³C, ²⁹Si NMR, IR spectroscopy, and gel permeation chromatography. The pyrolysis process of the oligomeric poly(diphenylsilylene-co-methylene) was investigated up to 1700 °C, and the gaseous, liquid, and viscous decomposition products were mainly identified by GC-MS coupling method. The ceramic residues were determined and analyzed, and the state of β-SiC crystallization was examined by XRD analysis.