Macromolecules

Syndiospecific Propylene Polymerization Using C 1-Symmetric a nsa-Metallocene Catalysts: Substituent and Bridge Effects

FJ Gómez, RM Waymouth

文献索引：Gomez, Fernando J.; Waymouth, Robert M. Macromolecules, 2002 , vol. 35, # 9 p. 3358 - 3368

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被引用次数: 28

摘要

A series of syndiospecific C 1-symmetric ansa-metallocenes ([Me2X (Cp)(2-R1-3-R2-Ind)] ZrCl2, X= C, Si; R1= H, Me; R2= Me, Et, CH2SiMe3) have been synthesized, and their catalytic behavior in the polymerization of propylene has been studied. Upon activation with MAO, these carbon-or silicon-bridged cyclopentadienyl/indenyl systems afford polypropylene with various degrees of syndiotacticity ([rrrr]= 28-66%), as a function of the ...