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.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
1998年第3期360-363,共4页
Acta Polymerica Sinica
关键词
双核
茂钛
聚合
乙烯聚合
催化剂
聚乙烯
Binuclear, Titanocene, Ethylene, Homogeneous, Polymerization
