乙烯聚合用树枝状过渡金属催化剂研究进展

Research progress of dendritic transition metal catalysts for ethylene polymerization

树枝状过渡金属催化剂是在树枝状大分子上负载上过渡金属活性中心,因此,此类催化剂既具有树枝状大分子特有的艺术结构,同时具有过渡金属配合物的功能化性能,两者兼具均相和非均相催化体系的特点,协同发挥作用,在催化烯烃聚合方面具有较高的催化活性和良好的催化稳定性。树枝状过渡金属催化剂催化乙烯聚合是其中的研究热点之一。该文按其过渡金属活性中心(Ni、Fe、Ti及其他)进行分类,综述了近年来国内外树枝状过渡金属催化剂在乙烯聚合方面的研究进展,阐述了多种树枝状效应产生的原因,并对乙烯聚合用树枝状过渡金属催化剂的发展前景进行了展望。

Transition metal dendrimer catalysts are prepared from transition metal active centers loaded on dendritic macromolecules. Therefore, these catalysts, with unique artistic structure of dendrimers, functional activity of transition metal complexes and characteristics of coupled homogeneous and heterogeneous catalytic systems, exhibited high catalytic activity and excellent stability in olefin polymerization with catalysis in ethylene polymerization one of the research hotspots. On the basis of the classification of transition metal active center, the recent progress of dendritic transition metal catalysts in ethylene polymerization at home and abroad was reviewed, followed by discussions on the causes of various dendritic effects. Finally, the development directions of dendritic transition metal catalysts for ethylene polymerization were prospected.