Polysilane preceramic polymers

Abstract From the Canadian patent

Chlorine or bromine-containing polysilanes of the general formula (R2Si)(RSi)(R'Si) are disclosed. In these polysilanes, there are also bonded to the silicon atoms other silicon atoms and chlorine or bromine atoms R is an alkyl, radical containing 1 to 4 carbon atoms and R' is selected, from the group consisting of alkyl radicals of at least six carbon atoms, phenyl radicals, and radicals of the formula AyX(3-y)Si(CH2)z- wherein each A is independently selected from a hydrogen atom or alkyl radicals containing 1 to 4 carbon atoms, y is an integer egual to 0 to 3 X is chlorine, or bromine, and z is an integer greater than or equal to 1. These preceramic polymers can be pyrolyzed at elevated …