八甲基环四硅氮烷离子开环聚合研究

Progress on ion ring-opening polymerization of octamethyl silazane

以甲苯为反应溶剂、三氯化钌为催化剂,六甲基二硅氮烷锂盐为引发剂,通过对八甲基环四硅氮烷离子开环聚合合成聚硅氮烷聚合物。利用红外射线和核磁共振表征聚合物结构。实验结果表明:160℃下,八甲基环四硅氮烷在钌基催化剂和锂盐引发剂共同作用下持续反应16h,发生完全开环聚合反应。最后在理论上阐明了不同实验条件下八甲基环四硅氮烷离子开环聚合效率不同的原因。

Toluene as the reaction solvent,ruthenium trichloride as the catalyst,hexamethyl disilazane lithium salt as the initiator,polysilazane polymer was prepared by octamethyl silazane ion ring-opening polymerization.The characterization of structure was conducted by IR and NMR.the experiment showed that at 160℃,octamethyl silazane taken ring-opening polymerization completely under the joint action of ruthenium catalyst and lithium salt initiator for 16 h.Finally,it was illustrated that the reason which the different efficiency of ion ring-opening polymerization under different experimental conditions.