Aiming at higher activities of group IV diamine bis(phenolate) catalysts in olefin polymerization, ligands containing electron-withdrawing groups have been introduced. The dibenzyl Zr complexes of these ligands lead to highly active 1-hexene catalysts upon activation yielding, however, low-molecular-weight titactic poly(1-hexene). In contrast, the corresponding titanium complexes are highly active and lead to ultrahigh-molecular-weight poly(1-hexene) of different isotacticities, dictated by the size of the phenolate substituents.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据