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New Polymer Precursors To SiNCB Materials

Published online by Cambridge University Press:  10 February 2011

T. Wideman ,
K. SU ,
E. E. Remsen ,
G. A. Zank  and
L. G. Sneddon
T. Wideman
Affiliation:
Department of Chemistry and Laboratory for the Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104
K. SU
Affiliation:
The Advanced Ceramics Program, Dow Corning Corporation, Midland, Michigan 48686
E. E. Remsen
Affiliation:
Analytical Sciences Center, Monsanto Corporate Research, Monsanto Company, 800 North Lindbergh Blvd., St. Louis, Missouri 63167
G. A. Zank
Affiliation:
The Advanced Ceramics Program, Dow Corning Corporation, Midland, Michigan 48686
L. G. Sneddon
Affiliation:
Department of Chemistry and Laboratory for the Research on the Structure of Matter, University of Pennsylvania, Philadelphia, Pennsylvania 19104
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Abstract

The first borazine/silazane backbone copolymers derived from the parent borazine, B3N3H6, have been obtained by the thermal condensation of borazine with either of two silazanes, tris(trimethylsilylamino)silane (TTS) or 1,1,3,3,5,5- hexamethylcyclotrisilazane (HCT), to yield copolymers of typical composition (B3N3H4)1.00(N)1.17(SiMe 3)1.16 (SiH)0.34 and (B3N3H4) 1.00(N) 1.67(SiMe 2)1.49(H) 1.5, respectively. Despite their similar compositions, upon pyrolysis the TTS copolymers yield B1.0N1.0Si<0.2 ceramics, while the ceramics derived from the HCT copolymers showed greater retention of silicon and carbon with typical compositions of B1.0N1.5Si0.4C0.2 The XRD spectra show the materials are amorphous to 1400 °C, but show crystalline phases of β-Si3N4, °C, with no diffraction from any boron-containing species. The DRIFT spectra of the ceramics, however, indicate the presence of boron nitride.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 410: Symposium S – Covalent Ceramics III-Science and Technology of Non-Oxides , 1995 , 185
Copyright
Copyright © Materials Research Society 1996

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References

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