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Poly(methylsilyne)



Poly(methylsilyne)
Formula[MeSi]n
Molecular mass200,000 to 100 million Daltons
Melting pointdecomposes @ 200°C
Boiling point N/A
Density??.?? g/cm3
CAS number???-??-?
SMILES???????

Poly(methylsilyne) (PMSy) is one of a class of silicon-based random network polymers primarily composed of tetrahedrally hybridized silicon atoms, each having one methyl substituent, exhibiting the generic formula [MeSi]n. PMSy is made from methyltrichlorosilane mixed with group 1 metal such as sodium and then mixed with organic group 1 metal and then water ,the reaction are all taken place in a solvent such as ether. At room temperature, poly(methylsilyne) is a dark yellow powder. It can be easily dissolved in a number of solvents (tetrahydrofuran, ether, toluene etc.), forming a colloidal suspension that is clear and non-viscous, which may then be deposited as a film or coating on various substrates. Upon thermolysis in argon at atmospheric pressure to 3 atmospheres and temperatures of 200 °C to 450 °C, decomposition of poly(methylsilyne) results in silicon carbide.

Additional recommended knowledge

The novelty of PMSy (and its related polymer poly(hydridocarbyne)) is that the polymer may be readily fabricated into various forms (e.g. films, fibers, plates) and then thermolized into a final silicon carbide ceramic.

References

  • U.S. Patent 6,989,428  "Methods of preparing polysilynes"
 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Poly(methylsilyne)". A list of authors is available in Wikipedia.
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