Dissymmetric ansa zirconocene complexes with di- and trisubstituted indenyl ligands as catalysts for homogeneous ethylene homo- and ethylene/1-hexene copolymerization reactions
作者:Andrea M. Rimkus、Helmut G. Alt
DOI:10.1016/j.poly.2017.01.021
日期:2017.4
PhCH2CH2, PhCH2CH2CH2, CH2CH = CH2. Subsequent deprotonation of these substituted indenes and reaction with indenyl zirconium trichloride gave the corresponding dissymmetric bis(indenyl) zirconium complexes. After activation with methylaluminoxane (MAO) these complexes show high activities both in ethylene homopolymerisation and ethylene/1-hexene copolymerisation. The rate of comonomer incorporation
摘要描述了合成1,2-和1,2,3-取代的茚衍生物的不同途径。代表性的取代基是:Me,Ph,PhCH 2,PhCH 2 CH 2,PhCH 2 CH 2 CH 2,CH 2 CH = CH 2。随后将这些取代的茚进行去质子化,并与茚三氯化锆反应,得到相应的不对称双(茚基)锆配合物。用甲基铝氧烷(MAO)活化后,这些络合物在乙烯均聚和乙烯/ 1-己烯共聚中均显示出高活性。共聚单体的掺入率可以达到33.3%(15 / MAO)。与均聚物相比,该共聚物具有更低的熔点,并且其结晶度α更低。