atactic

The activity and stereospecificity of the catalyst were so high that the very small amount of catalyst residues and atactic polypropylene possibly formed during the polymerization process might be left in the product without any further treatment.

由于该催化剂具有高活性和高定向能力，催化剂的残渣和无规物的含最很低，因而可以不经处理而残留在产品中。

It was concluded from the experiment that the content of the isotactic polymer was the lest, the syndiotactic polymer was the most and the atactic polymer was between them.

由实验得到以下主要结论：PA-18降凝剂结构中全同立构聚合物含量最少，间同立构聚合物含量最多，无规立构聚合物含量介于两者之间。

Preparation of atactic polypropylene elastomers with a c_p~ ticl_2n [ si ( ch_3)_3]_2/ mao catalyst

Cp~TiCl2N[Si（CH3）3]2/MAO催化剂合成无规聚丙烯弹性体