Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-26T07:52:18.906Z Has data issue: false hasContentIssue false
  • English
  • Français

Carborane-Siloxane-Diacetylene Thermosets and Ceramic Precursors

Published online by Cambridge University Press:  10 February 2011

J. P. Armistead ,
E. J. Houser ,
D. Y. Son  and
T. M. Keller
J. P. Armistead
Affiliation:
Naval Research Laboratory, Washington, D.C. 20375
E. J. Houser
Affiliation:
Naval Research Laboratory, Washington, D.C. 20375
D. Y. Son
Affiliation:
Naval Research Laboratory, Washington, D.C. 20375
T. M. Keller
Affiliation:
Naval Research Laboratory, Washington, D.C. 20375
Get access

Abstract

Thermosets and ceramic chars were characterized for three polymeric materials consisting of diacetylene-siloxane repeat units, DaS, diacetylene-siloxane-carborane-siloxane repeat units, DaSCS, and a 90/10 copolymerization. The goal was to incorporate the known thermo-oxidative stability of the siloxane-carborane elastomers into high performance thermosets and ceramic chars. The DaSCS thermoset has excellent thermo-oxidative stability as determined by a low weight loss and tough residue after annealing 100 hours in air at 316°C, however the glass transition is a low 94°C. DaS and 90/10 thermosets do not undergo glass transitions below 350°C and have low weight losses on thermo-oxidative aging, however the residue was quite brittle. The much higher carborane content in DaSCS also seems to help in ceramic char formation. All polymers had similar char yields to 800°C, whereas DaSCS solidified to a 15% denser ceramic.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 576: Symposium DD – Organic/Inorganic Hybrid Materials II , 1999 , 93
Copyright
Copyright © Materials Research Society 1999

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Peters, E. N., J. Macromol. Sci.-Rev. Macromol. Chem., C17, 173 (1979).10.1080/00222357908080910Google Scholar
2. Critchley, J. P., Knight, G. J., Wright, W. W., “Heat-Resistent Polymers: Technically Useful Materials,” Plenum Press, New York, 1983, chapter 7.10.1007/978-1-4899-0396-9Google Scholar
3. Henderson, L. J., Keller, T. M., Macromolecules, 27, 1660 (1994).10.1021/ma00084a060Google Scholar
4. Son, D. Y., Keller, T. M., Macromolecules, 28, 399 (1995).10.1021/ma00105a060Google Scholar
5. Son, D. Y., Keller, T. M., J. Polym. Sci. Part A: Polym. Chem., 33, (1995).10.1002/pola.1995.080331715Google Scholar
6. Corriu, R. J. P., Gerbier, P., Guerin, C., Henner, B. J. L., Jean, A., Mutin, P. H., Organometallics, 11, 2507 (1992).10.1021/om00043a038Google Scholar
7. Wilson, A. M., Zank, G., Eguchi, K., Xing, W., Yates, B., Dahn, J. R., Chem. Mater., 9, 1601 (1997).10.1021/cm970002rGoogle Scholar