Application of photocurable pre-ceramic polymers
A process for synthesizing photocurable poly(ethynyl) carbosilane includes the steps of mixing dichlorosilane and trichlorosilane reagents, adding sub-stoichiometric amounts of alkali metal and adding excess sodium acetylide.
1. A process for synthesizing photo-curable poly(ethynyl)carbosilane, comprising the steps of:
reacting a sub-stoichiometric amount of an alkali metal with an organochlorosilane, thereby forming a partially polymerized polyorganochlorosilane; and
reacting the partially polymerized polyorganochlorosilane with sodium acetylide to form photo-curable poly(ethynyl)carbosilane.
2. The process of claim 1 , in which the organochlorosilane comprises a mixture of organodichlorosilane and organotrichlorosilane.
3. The process of claim 1 , in which the organochlorosilane comprises a mixture selected from dichlorodimethylsilane, trichlorophenylsilane, and methyltrichlorosilane.
4. The process of claim 1 , further comprising removing sodium chloride after the first reacting step.
5. The process of claim 1 , further comprising condensing the partially polymerized polyorganochlorosilane.
6. The process of claim 1 , further comprising dissolving the partially polymerized polyorganochlorosilane in a solvent prior the second reacting step.
7. The process of claim 1 , further comprising retrieving the photo-curable poly(ethynyl)carbosilane by solvent evaporation.
8. The process of claim 1 , further comprising retrieving the photo-curable poly(ethynyl)carbosilane by filtration.