硅氧硅桥链的双核茂钛催化剂用于乙烯聚合的研究  

DISILOXANE BRIDGED BINUCLEAR TITANOCENE CATALYSTS FOR ETHYLENE POLYMERIZATION

作　　者：冯茹[1] 苏立明[1] 贺大为[1] 王佰全[2] 田公路[2] 许善生 周秀中[2] 

机构地区：[1]中国科学院化学研究所 [2]南开大学化学系

出　　处：《高分子学报》1998年第3期360-363,共4页Acta Polymerica Sinica

摘　　要：硅氧硅桥链的双核茂钛催化剂用于乙烯聚合的研究冯茹苏立明贺大为（中国科学院化学研究所北京１０００８０）王佰全田公路许善生周秀中（南开大学化学系天津３０００７１）关键词双核，茂钛，均相，聚合金属茂与烷氧基铝（ＭＡＯ）作为烯烃聚合的催化体系以其高活性...Two tetramethyldisiloxanediyl bridged binuclear titanocenes Cl_2CpTiCp*(CH_3)_2SiOSi(CH_3)_2Cp*TiCpCl_2(Cp*=substituted cyclopendienyl, R=H in catalyst A, R=Si(CH_3)_3 in catalyst B) have been synthesized by the reacting dilithium salts of Cp*(CH_3)_2SiOSi(CH_3)_2Cp* with CpTiCl_3 in the yields of 42% and 51% respectively. Their catalysis behavior for the polymerization of ethylene under different conditions were investigated, and compared with mononuclear metallocene, cyclopentadienyl titanium dichloride. The result showed that these two catalysts have a middle activity for ethylene polymerization. The MWD of the polyethylene were rather wide and the highest molecular weight was as high as 5.9×10.4g/mol. Furthermore, catalyst B exhibited unexpected temperature dependence for ethylene polymerization.

关 键 词：双核 茂钛 聚合 乙烯聚合 催化剂 聚乙烯 

分 类 号：O632.12[理学—高分子化学] O643.36[理学—化学]