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Chemically Designed, UV Curable Polycarbosilane Polymers

  • Kevin J. Thorne (a1), Stephen E. Johnson (a2), Haixing Zheng (a1), John D. Mackenzie (a1) and M. F Hawthorne (a2)...

Abstract

To prepare new polycarbosilane polymer precursors with high solubility and the capability of UV cross-linking, commercial polycarbosilane was modified by a chemical route. These modifications involved AlCl3 catalyzed chlorination reactions of polycarbosilane's Si-H bonds. The resultant Si-Cl bonds were substituted by a reaction with sodium acetylyde to form Si-C=CH ligands. These ligands are suitable for controlled, free radical initiated cross-linking of the polycarbosilane polymers. The increase in molecular weight should allow for increased Tg's and the retention of polymer pre-forms. In this report, the chlorination of the polycarbosilane polymer and the substitution reactions of polycarbosilane were examined with IR, 29Si and 13C NMR spectroscopy. In addition, the retention of polymer pre-forms were analyzed after UV exposure and inert atmosphere pyrolysis.

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[1] Yajima, S., Hayashi, J., Omori, M.. Chemistry Letters. (1975), 931.
[2] Yajima, S., Okamura, K., Matsuzawa, T., Hasegawa, Y., Nature. 279 (1979) 706.
[3] Okamura, K., Sato, M., Matusuzawa, and Hasegawa, Y. Third International Conference on Ultrastructure Processing of Ceramics, Glasses and Composites. San Diego, C. A. Feb 23–27, 1987.
[4] Yajima, S., Iwai, T., Yamamura, T., Okamura, K., Hasegawa, Y.. J. Mater. Sci. 16 (1981) 1349.
[5] Yajima, S., Okamura, K., Hayashi, J. and Omori, M.. J. Am. Ceram. Soc., 59, 78, (1976) 324.
[6] Babonneau, F., Soraru, G. and Mackenzie, J. D.. J. Mater. Sci., 25 (1990) 3664.
[7] Ishikawa, M., Kumada, M. and Sakurai, H.. J. Organometal. Chem., 23, 63 (1970).
[8] Bacque, E., Pillot, J. P., Birot, M. and Dunogues, J. in Transformation or Organometallics into Common Exotic Materials: Design and Activation, edited by Laine, R. M. (Martinus Nijhoof Publishers, 1988) pp. 116132.

Chemically Designed, UV Curable Polycarbosilane Polymers

  • Kevin J. Thorne (a1), Stephen E. Johnson (a2), Haixing Zheng (a1), John D. Mackenzie (a1) and M. F Hawthorne (a2)...

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