Asymmetric binuclear metallocene complexes and their application for olefin polymerization

作者：Xu, Sheng; Huang, Jiling^*

来源：Journal of Applied Polymer Science, 2013, 130(4): 2891-2900.

DOI：10.1002/app.39376

• catalysts
• copolymers
• polyolefins

Asymmetric double silylene-bridged binuclear complexes [((5)-RC5H4)MCl2](2)[, -(SiMe2)(2)((5)-t-BuC5H2)((5)-C5H3)][R = H, M = Ti (1); R = Me, M = Ti (2); R = allyl, M = Ti(3); R = H, M = Zr (4); R = allyl, M= Zr (6)]; and [((5)-C5H5)TiCl2](2)[, -(SiMe2)(2)((5)-Me3SiC5H2)((5)-C5H3)] (5) were synthesized by the reaction of ((5)-RC5H4) TiCl3 or ((5)-RC5H4)ZrCl3 center dot DME (R = H, allyl) with [, - (SiMe2)(2)((5)-t-BuC5H2)((5)-C5H3)] Li-2 or [, -(SiMe2)(2)((5)-Me3Si C5H2)((5)-C5H3)]Li-2 in THF, and they were all well characterized by H-1 NMR, MS, IR, and EA. When activated with methylaluminoxane (MAO), they are efficient catalysts for the polymerization of ethylene (Complex 4, 5.99 x 10(5) g-PE/mol center dot Zr center dot h) and the polymer with multipeak broaden molecular weight distribution (PD = Mw/Mn) was obtained (polymer sample gained by complex 3, PD = 25.03). The copolymerization results indicate that 1-hexene could incorporate into the growing PE chain with these complexes in the presence of MAO (Complex 4, 1.07 x 10(6) g-PE/mol center dot Zr center dot h; 1-hexene content, 1.57% mol).

• 出版日期2013-11-15
• 单位华东理工大学