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

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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).

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Acknowledgments

We thank MHRD, India for financial support. VK is thankful to CSIR – India for a Senior Research Fellowship. We are thankful to Prof. Kiyohito Okamura, Department of Metallurgy and Materials Science Graduate School of Enggineering, Osaka Prefecture University, Osaka 599–8531, Japan for his help in performing high-temperature pyrolyis.

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Authors and Affiliations

  1. Department of Chemistry, Indian Institute of Technology – Kanpur, Kanpur, 208 016, India

    Vadapalli Chandrasekhar, Venkatasubbaiah Krishnan & Palani Sasikumar

  2. Department of Materials and Metallurgical Engineering, Indian Institute of Technology – Kanpur, Kanpur, 208 016, India

    Varanasi S. R. Murthy

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  1. Vadapalli Chandrasekhar
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  2. Venkatasubbaiah Krishnan
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  3. Palani Sasikumar
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Correspondence to Vadapalli Chandrasekhar.

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Dedicated to Prof. C. W. Allen in recognition of his outstanding contributions to inorganic polymers.

Deceased in a tragic car accident in July 2004.

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Chandrasekhar, V., Krishnan, V., Sasikumar, P. et al. Chemically Cross-linked Polysilanes as Stable Polymer Precursors for Conversion to Silicon Carbide. J Inorg Organomet Polym 17, 439–446 (2007). https://doi.org/10.1007/s10904-007-9131-6

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  • DOI: https://doi.org/10.1007/s10904-007-9131-6

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