Abstract The oily oligomers with low-molecular-weight, medium kinematic viscosity and high viscosity index are yielded through oligomerizations of higher α-olefins (1-hexene, 1-octene, 1-decene, 1-dodecene and 1-tetradecene) and co-oligomerization of 1-decene with 1-butene in the presence of the silicon-bridged Ph2Si(Cp)(9-Flu)ZrCl2 catalyst and the methylaluminoxane co-catalyst. The oligomerization activity is affected by the bulkiness and lateral size of monomer, and the viscosity of oligomer obtained. Through adding of 1-butene to 1-decene, the oligomerization activity is decreased, but viscosity index of oligomer obviously is increased. The highest co-oligomerization activity of 1-decene with 1-butene is presented at the temperature of 60 °C and Al/Zr molar ratio of 300. 1H and 13C NMR spectroscopy reveal that four types of vinylidene are existed in oligomers and the major olefinic bonds are internal disubstituted vinylidene, which are produced through 2,1-misinsertion and β-hydride elimination, or 2,1-misinsertion and rearrangement followed by β-hydride elimination. The chain termination of oligomerization of α-olefins favors chain transfer to the co-catalyst to produce saturated end group. The oligomerization pathways are summarized.

中文翻译：

---

硅桥茂二茂锆催化剂用于润滑油基础油合成低分子量聚α-烯烃

摘要 高级α-烯烃（1-己烯、1-辛烯、1-癸烯、1-十二碳烯和1-十四碳烯）与共聚反应得到低分子量、中等运动粘度、高粘度指数的油状低聚物。 -在硅桥联的 Ph2Si(Cp)(9-Flu)ZrCl2 催化剂和甲基铝氧烷助催化剂存在下，1-癸烯与 1-丁烯的低聚反应。低聚活性受单体的体积和横向尺寸以及所得低聚物的粘度影响。通过向1-癸烯中加入1-丁烯，降低了低聚活性，但明显提高了低聚物的粘度指数。1-癸烯与 1-丁烯的最高共聚活性出现在 60 °C 和 Al/Zr 摩尔比为 300 时。1H 和 13C NMR 谱表明低聚物中存在四种类型的亚乙烯基，主要的烯键是内部二取代的亚乙烯基，通过 2,1-错误插入和 β-氢化物消除或 2,1-错误插入和重排产生β-氢化物消除。α-烯烃低聚的链终止有利于链转移到助催化剂以产生饱和端基。总结了寡聚化途径。