侧链含锑聚硅烷的合成与性能研究

Synthesis and Characterization of Polysilanes with Antimony Side Groups

侧链含锑聚硅烷的合成可通过聚甲基硅烷的高分子反应在室温条件下实现，聚合物产率为75．2％，数均分子量为1600。其分子结构与组成可由元素分析、FT-IR、^1H—NMR、^29Si CP／MAS NMR、GPC和UV来确认。PSA可溶于一般常见的有机溶剂，紫外吸收的最大波长为330nm，其热分解特性表明，陶瓷收率为80％，可用作SiC陶瓷先驱体；其本体电导率为10^-8～10^-7S／cm，将其与碘掺杂，电导率可以达到10^-5S／cm以上。

Polysilanes with antimony side groups （PSA） can be synthesized from polymer reaction of polymethylsilane at room temperature. In so doing, the yield of polymer is 75.2% and the average molecular weights of the polymer are around 1600. Its chemical composition and structure can be characterized by elemental analysis, FF-IR, 1H-NMR,^29Si CP/MAS NMR, GPC, and UV. It is soluble in the common organic solvent; the UV absorption maximum wavelength is 330urn. The property of pyrolysis shows that its ceramic yield is 80% and it is a potential preceramic polymer. This polymer shows good semiconductive properties, whose intrinsic conductivities are within the range of 10^-8～ 10^-7S/cm, and can be increased above 10^5 S/cm after being doped with iodine.