Paper number 1014

SYNTHESIS AND CHARACTERIZATION OF NOVEL SILAZANE PRECURSORS

Haifeng Hu, Zhaohui Chen, Wenwei Zheng, and Jiayu Xiao

Department of Material Engineering and Applied Chemistry, National University of Defense Technology, Changsha 410073, P.R.China

Summary

Two silazane precursors, PHAASZ (cyclo-[MeHSiNCH2CH=CH2]4) and PMAASZ (cyclo-[Me2SiNCH2CH=CH2]4), were obtained by reacting allylamine with MeHSiCl2 and Me2SiCl2, respectively. PHAASZ crosslinked readily under catalyst H2PtCl6 or initiator dicumyl peroxide (DCP), while PMAASZ under DCP and heat treatment. Upon pyrolysis in N2 crosslinked PHAASZ (H2PtCl6) led to a black solid with 71.0wt% yield (1273K), and PMAASZ (DCP) with 65.4wt% yield.

Keywords

polysilazane, pyrolysis, ceramic yield.