It not only expands the application of metallocene catalysts in polymer science, but also develops a kind of polar polyolefin resin featuring new performance.
不仅拓宽了茂金属催化剂的应用范围，而且可开发出具有新性能的极性聚烯烃树脂。
The half-metallocene of the elements V, Nb and Ta in VB group could be used in the polymerization of olefin to prepare polymer with rather narrow molecular weight distribution (1.05).
VB族元素钒、铌、钽的单茂金属化合物作为烯烃催化剂可得到分子量分布相当窄（1.05）的聚烯烃；
The dinuclear metallocene catalysts, which have two diffeent active sites in one molecule, should be able to produce polymer with broader or bimodal molecular weight distribution.
因此，双核茂金属催化剂的研发已经成为一个热点，大量的文献表明双核茂金属催化剂确实能改善聚合物的分子量分布，得到性能更为优异的聚烯烃材料。
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