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Organosilicon polymers with bis‐acetylenic units: Conductivity and ceramisation studies
Author(s) -
Corriu R.,
Gerbier P.,
Guerin G.,
Henner B.
Publication year - 1996
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19961010136
Subject(s) - organosilicon , materials science , ceramic , carbon fibers , yield (engineering) , polymer , ceramic matrix composite , silicon , silicon carbide , conductivity , tin , composite material , chemical engineering , polymer chemistry , chemistry , composite number , metallurgy , engineering
The transformation poly[(silylene)diacetylene] into ceramic have been studied and SiC obtained with a quantitative yield: all the silicon atoms present in the starting material are converted into SiC. The key step is the crosslinkage of C 4 units into a carbon matrix in which the R 1 SiR 2 moieties are in the vicinity one to each other allowing the quantitative transformation into SiC. The carbon content of the resulting ceramic depends on the nature of R 1 and R 2 groups. The excess of carbon has been used for the carboreduction of oxides (TiO 2 , ZrO 2 , HfO 2 , etc…) and mixed ceramics with interpenetrating network have been obtained: SiC / TiC, SiC / ZrC, etc… Under nitrogen atmosphere, the ceramisation leads to different systems such as SiC / TiN, SiC / AlN, etc…