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A TG/GC/MS Study of the Structural Transformation of Hybrid Gels Containing Si-H and Si-CH3 Groups into Oxycarbide Glasses

  • G. D. Sorarù (a1), R. Campostrini (a1), G. D'andrea (a1) and S. Maurina (a1)

Abstract

The pyrolytic transformation of hybrid gels containing Si-CH3 and Si-H groups is studied with a novel TG/GC/MS technique. Pyrolysis of a gel precursor for SiOC system shows a main decomposition step with the evolution of many different silanes and siloxane species arising from redistribution of Si-H and Si-O bonds in the polymeric network. B-containing gel, precursor for SiBOC oxycarbide glasses, displays a dramatically different pyrolysis pathway in which the redistribution reactions are completely suppressed and the Si-H and Si-CH3 groups are partially consumed at low temperature (≈ 220°C) to form H2 and CH4.

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A TG/GC/MS Study of the Structural Transformation of Hybrid Gels Containing Si-H and Si-CH3 Groups into Oxycarbide Glasses

  • G. D. Sorarù (a1), R. Campostrini (a1), G. D'andrea (a1) and S. Maurina (a1)

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