Chemically Cross-linked Polysilanes as Stable Polymer Precursors for Conversion to Silicon Carbide

Cross-linked polysilanes were prepared by the co-polymerization of Me2SiCl2 or PhMeSiCl2 with varying amounts of divinylbenzene (2–15% by weight) using molten sodium as the dehalogenating agent. All the cross-linked polysilanes were stable to air and could be processed thermally for conversion to si...

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Bibliographic Details
Published inJournal of inorganic and organometallic polymers and materials Vol. 17; no. 2; pp. 439 - 446
Main Authors Chandrasekhar, Vadapalli, Krishnan, Venkatasubbaiah, Sasikumar, Palani, Murthy, Varanasi S. R.
Format Journal Article
LanguageEnglish
Published New York Springer Nature B.V 01.06.2007
Subjects
Conversion
Copolymerization
Crosslinking
Divinylbenzene
Heat treatment
Polysilanes
Prepolymers
Silicon carbide
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Summary:Cross-linked polysilanes were prepared by the co-polymerization of Me2SiCl2 or PhMeSiCl2 with varying amounts of divinylbenzene (2–15% by weight) using molten sodium as the dehalogenating agent. All the cross-linked polysilanes were stable to air and could be processed thermally for conversion to silicon carbide. Polymers containing from 5–15% of the cross-linking agent underwent a uniform shrinkage during thermal treatment (1500 °C) to afford β-SiC in good yields. The ceramic was characterized by a variety of techniques including Raman and infrared spectroscopy, powder XRD, as well as Scanning Electron Microscopy (SEM).
ISSN:1574-1443
1574-1451
DOI:10.1007/s10904-007-9131-6