第ⅣB族非茂金属烯烃聚合催化剂

烯烃聚合催化剂技术的发展关系着聚烯烃工业的命脉,而第ⅣB族非茂金属烯烃聚合催化剂作为目前催化剂研究的热点之一,不仅具有催化活性高、共聚单体范围广以及聚合物结构可控等优点,并且相比于茂金属催化剂而言,合成简单、成本低廉,有利于丰富烯烃聚合催化剂的种类和开发新型聚烯烃产品。本文按照配体的价齿类型综述了近十年来第ⅣB族非茂金属烯烃聚合催化剂的结构特点,及其在烯烃均聚和共聚反应中的催化性能,讨论了配体的电子效应和位阻效应对于配合物催化活性以及所得聚合物的结构、分子量等性质的影响,并对相关领域的未来发展提出了建议。

Advances in Group 4 Non-Metallocene Olefin Polymerization Catalysis

Group 4 non-metallocene catalyst is an important type of catalyst for olefin polymerization. It not only possesses advantages of high catalytic activity and wide scope of comonomers, but also can obtain poly-olefins with controllable structure. Besides, the synthesis and cost of this type of catalyst are easier and lower compared with metallocene catalyst. These advantages help group 4 non-metallocene catalyst enriching the catalyst structure and developing new polyolefin products. The research process of group 4 non-metallocene catalyst in recent ten years has been reviewed according to the structure of ligands. The structure characteristics and catalytic performance in olefin homo- and copolymerization of this kind of catalyst has been discussed, focusing on the electronic and steric effect within ligands on the catalytic activity of complexes and properties of resultant polyolefins. Finally, some suggestions on the future development of the related fields are put forward.