Synthesis and Characterization of Novel Preceramic Polymer for SiC

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Polyphenylcarbosilane as a novel preceramic polymer for SiC was synthesized from thermal rearrangement of polymethylphenylsilane around 350 C {approx} 430 C. Characterization of synthesized polyphenylcarbosilane was performed with {sup 29}Si, {sup 13}C, {sup 1}H NMR, FT-IR, TG, XRD, and GPC analysis. From FT-IR data, the band at 1035 cm{sup -1} was very strong and assigned to CH{sub 2} bending vibration in Si-CH{sub 2}-Si group, indicating the formation of the polyphenylcarbosilane. The average of the molecular weight (M{sub w}) of the polyphenylcarbosilane synthesized was 2,500 and easily dissolves in an organic solvent. TGA data indicates that polyphenylcarbosilane is thermally stable up ... continued below

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Lee, Y J; Lee, J H; Kim, S R; Kwon, W T; Oh, H; Klepeis, J P et al. August 20, 2009.

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Polyphenylcarbosilane as a novel preceramic polymer for SiC was synthesized from thermal rearrangement of polymethylphenylsilane around 350 C {approx} 430 C. Characterization of synthesized polyphenylcarbosilane was performed with {sup 29}Si, {sup 13}C, {sup 1}H NMR, FT-IR, TG, XRD, and GPC analysis. From FT-IR data, the band at 1035 cm{sup -1} was very strong and assigned to CH{sub 2} bending vibration in Si-CH{sub 2}-Si group, indicating the formation of the polyphenylcarbosilane. The average of the molecular weight (M{sub w}) of the polyphenylcarbosilane synthesized was 2,500 and easily dissolves in an organic solvent. TGA data indicates that polyphenylcarbosilane is thermally stable up to 400 C. However, the rapid weight loss occurs above 400 C due to the pyrolysis of polyphenylcarbosilane, and the diffraction peak of pyrolysis residue at 1200 C corresponds to the {beta}-SiC ceramic. The ceramic yield calculated from TGA is approximately 65%.

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PDF-file: 12 pages; size: 0.7 Mbytes

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  • Journal Name: Journal of Material Science, vol. 45, no. 4, February 1, 2010, pp. 1025-1031; Journal Volume: 45; Journal Issue: 4

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  • Report No.: LLNL-JRNL-416396
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 1010389
  • Archival Resource Key: ark:/67531/metadc840563

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • August 20, 2009

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  • May 19, 2016, 3:16 p.m.

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  • Dec. 2, 2016, 2:52 p.m.

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Lee, Y J; Lee, J H; Kim, S R; Kwon, W T; Oh, H; Klepeis, J P et al. Synthesis and Characterization of Novel Preceramic Polymer for SiC, article, August 20, 2009; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc840563/: accessed October 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.